37 results on '"Tomohiko Sakatani"'
Search Results
2. The impact of home electrocardiograph measurement rate on the detection of atrial fibrillation recurrence after ablation: A prospective multicenter observational study
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Keitaro Senoo, Arito Yukawa, Takashi Ohkura, Hibiki Iwakoshi, Tetsuro Nishimura, Satoshi Shimoo, Keiji Inoue, Tomohiko Sakatani, Ken Kakita, Tetsuhisa Hattori, Hiroki Kitajima, Kentaro Nakai, Suguru Nishiuchi, Mitsuko Nakata, Satoshi Teramukai, Hirokazu Shiraishi, and Satoaki Matoba
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Atrial fibrillation ,Electrocardiography ,e-Health ,Monitoring ,Catheter ablation ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: This multicenter prospective observational study examined the impact of additionally using a home electrocardiograph (ECG) to detect atrial fibrillation (AF) recurrence after ablation. Methods: Between May 2019 and December 2020, 128 patients undergoing ablation were enrolled in the study. After performing ablation, they were instructed to measure their ECGs at home using Complete (ECG paired with a blood pressure monitor; Omron Healthcare, Japan) every day and to visit the hospital every 3 months until after 12 months for 24-hour Holter ECG and 12-lead ECG as usual care (UC). Results: After ablation, 94 patients were followed up, and AF recurrence at 12 months was detected more commonly in adjudicators-interpreted Complete (31 [33 %]) than in UC (18 [9 %]) (hazard ratio 1.95, 95 % confidence interval [95 %CI] 1.35–2.81, P
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- 2023
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3. Cholesterol crystal depth in coronary atherosclerotic plaques: A novel index of plaque vulnerability using optical frequency domain imaging.
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Masahiro Koide, Akiko Matsuo, Satoshi Shimoo, Kazuaki Takamatsu, Atsushi Kyodo, Yumika Tsuji, Kayoko Mera, Yoshinori Tsubakimoto, Koji Isodono, Tomohiko Sakatani, Keiji Inoue, and Hiroshi Fujita
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Medicine ,Science - Abstract
The involvement of cholesterol crystals (CCs) in plaque progression and destabilization of atherosclerotic plaques has been recently recognized. This study aimed to evaluate the association between the intraplaque localization of CCs and plaque vulnerability.We investigated 55 acute coronary syndrome (ACS) and 80 stable angina pectoris (stable AP) lesions using optical frequency domain imaging (OFDI) prior to percutaneous coronary intervention. The distance between CCs and the luminal surface of coronary plaques was defined as CC depth.Although the incidence of CCs had similar frequencies in the ACS and stable AP groups (95% vs. 89%, p = 0.25), CC depth was significantly less in patients with ACS than in those with stable AP (median [25th to 75th percentile]: 68 μm [58 to 92 μm] vs. 152 μm [115 to 218 μm]; p < 0.001). The incidences of plaque rupture, thrombus, lipid-rich plaques, and thin-cap fibroatheroma were significantly greater in patients with ACS than in those with stable AP (62% vs. 18%, p < 0.001; 67% vs. 16%, p < 0.001; 84% vs. 57%, p < 0.01; and 56% vs. 19%, p < 0.001, respectively).OFDI analysis revealed that CCs were found in the more superficial layers within the coronary atherosclerotic plaques in patients with ACS than in those with stable AP, suggesting that CC depth is associated with plaque vulnerability. CC depth, a novel OFDI-derived parameter, could be potentially used as an alternative means of evaluating plaque vulnerability in coronary arteries.
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- 2017
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4. IVUS-Guided Wiring Improves the Clinical Outcomes of Angioplasty for Long Femoropopliteal CTO Compared with the Conventional Intraluminal Approach
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Koji Isodono, Tomohiko Sakatani, Yoshinori Tsubakimoto, Daisuke Irie, Akiko Shiraga, Akiko Matsuo, Hiroshi Fujita, Tomotaka Fujimoto, Yosuke Kirii, Takeru Kasahara, Keiji Inoue, and Makoto Ariyoshi
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Male ,Reoperation ,medicine.medical_specialty ,Duplex ultrasonography ,medicine.medical_treatment ,Lumen (anatomy) ,Arterial Occlusive Diseases ,030204 cardiovascular system & hematology ,Severity of Illness Index ,Lesion ,03 medical and health sciences ,0302 clinical medicine ,Japan ,Restenosis ,Angioplasty ,Outcome Assessment, Health Care ,Intravascular ultrasound ,Internal Medicine ,medicine ,Humans ,Popliteal Artery ,Endovascular treatment ,Ultrasonography, Interventional ,Vascular Patency ,Aged ,medicine.diagnostic_test ,business.industry ,Endovascular Procedures ,Biochemistry (medical) ,medicine.disease ,Quality Improvement ,Femoropopliteal segment ,Femoral Artery ,Chronic total occlusion ,Surgery, Computer-Assisted ,Chronic Disease ,Velocity ratio ,Female ,Original Article ,Radiology ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,030217 neurology & neurosurgery - Abstract
Aims: This study aimed to assess the clinical efficacy of intravascular ultrasound (IVUS)-guided intraplaque wiring for femoropopliteal (FP) chronic total occlusion (CTO). Methods: This single-center, retrospective, observational study was performed at the Japanese Red Cross Kyoto Daini Hospital. From March 2013 to June 2017, a total of 75 consecutive patients (mean age: 75.4 ± 8.5 years; 59 males), who underwent endovascular treatment (EVT), having 82 de novo FP-CTO lesions, were enrolled in this study. Eleven of the lesions that met the exclusion criteria were excluded, and the remaining 71 lesions were divided into the IVUS-guided wiring group (n = 34) and non-IVUS-guided wiring group (n = 37). Primary patency, defined as a peak systolic velocity ratio of < 2.4 on duplex ultrasonography, and freedom from clinically driven target lesion revascularization (CD-TLR) at 12 months were the primary outcomes. Results: The mean lesion length was 21.6 ± 8.9 cm. The frequencies of primary patency and freedom from CD-TLR were significantly higher in the IVUS-guided wiring group than in the non-IVUS-guided wiring group (70.0% vs. 52.2%, p = 0.045; 83.9% vs. 62.8%, p = 0.036, respectively). The complete clinically true lumen angioplasty rate was also higher in the IVUS-guided wiring group than in the non-IVUS-guided wiring group (91.1% vs. 51.3%, p < 0.001, respectively). The clinically true and false wire passage rates were respectively 97.3% and 2.7% in the IVUS-guided wiring group. Conclusion: IVUS-guided wiring improves the clinical outcomes of EVT for FP-CTO by achieving a high clinically true lumen wire passage rate.
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- 2021
5. Cardiovascular event risk estimated after coronary revascularization and optimal medical therapy: J-ACCESS4 prognostic study
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Tomohiko Sakatani, Tsunehiko Nishimura, Hiroshi Fujita, and Kenichi Nakajima
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Cardiovascular event ,Adult ,medicine.medical_specialty ,Time Factors ,medicine.medical_treatment ,Myocardial Ischemia ,030204 cardiovascular system & hematology ,Single-photon emission computed tomography ,Revascularization ,Risk Assessment ,Ventricular Function, Left ,Cardiac ischemia ,Coronary artery disease ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Image Processing, Computer-Assisted ,Medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,030212 general & internal medicine ,Aged ,Aged, 80 and over ,Tomography, Emission-Computed, Single-Photon ,Ejection fraction ,medicine.diagnostic_test ,business.industry ,99mTc-tetrofosmin ,Myocardial Perfusion Imaging ,Technetium ,General Medicine ,Middle Aged ,medicine.disease ,Multicenter study ,Treatment Outcome ,Cardiology ,Original Article ,Female ,business ,Perfusion ,Medical therapy ,Emission computed tomography ,Software ,Follow-Up Studies - Abstract
Background An assessment of cardiac events and survival using quantitative gated myocardial single-photon emission computed tomography (SPECT) (J-ACCESS) associated several risk factors with cardiac events in Japan. The clinical course after revascularization and/or optimal medical therapy (OMT) was followed in patients with coronary artery disease (CAD) at moderate-to-high risk estimated by software incorporating the J-ACCESS risk model. The present study aimed to determine the relevance of changes in estimated risk to outcomes of these therapies. Methods This study included 494 patients with possible or definite CAD who underwent initial pharmacological stress 99mTc-tetrofosmin myocardial perfusion SPECT (MPS) before and eight months after therapy. Major cardiac event risk during 3 years of follow-up was calculated using an equation based on that in the J-ACCESS study. Patients with ≥ 10% cardiac event risk estimated at the first MPS (n = 31) were analyzed and followed up for at least 1 year. Results Estimated risk was reduced by ≥ 5% in 14 patients (45%) after therapy. During a follow-up period of 22.1 ± 6.7 months, one patient without such reduction had a major cardiac event. Mean %summed stress scores significantly decreased from baseline to follow-up in patients with and without risk reduction. Left ventricular ejection fraction (LVEF [%]) at rest was significantly increased at the second, compared with the first MPS between patients with, than without risk reduction (57 ± 17 vs. 45 ± 16%, p = 0.001 and 50 ± 11 vs. 49 ± 9%, p = 0.953, respectively). Conclusions A reduction in cardiac ischemia and an increase in LVEF by revascularization and/or OMT were necessary to avoid cardiac events among patients with moderate-to-high estimated risk, and changes in event risk were quantifiable.
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- 2021
6. Prognostic value of left ventricular mechanical dyssynchrony induced by exercise stress in patients with normal myocardial perfusion single-photon emission computed tomography
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Tomohiko Sakatani, Keiji Inoue, Hiroshi Fujita, Akiko Matsuo, Daisuke Irie, Takeru Kasahara, and Yoshinori Tsubakimoto
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medicine.medical_specialty ,030204 cardiovascular system & hematology ,Single-photon emission computed tomography ,Pharmacological stress ,030218 nuclear medicine & medical imaging ,Ventricular Dysfunction, Left ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,In patient ,Retrospective Studies ,Tomography, Emission-Computed, Single-Photon ,medicine.diagnostic_test ,business.industry ,Myocardial Perfusion Imaging ,Exercise stress ,Prognosis ,medicine.disease ,Perfusion ,Heart failure ,Cardiology ,Cardiac-Gated Single-Photon Emission Computer-Assisted Tomography ,Cardiology and Cardiovascular Medicine ,Phase analysis ,business ,Emission computed tomography - Abstract
Left ventricular mechanical dyssynchrony (LVMD) induced by exercise stress was reported to be clinically useful in detecting multivessel coronary artery diseases. The aim of this study was to compare the prognostic value of LVMD induced by pharmacological stress with that induced by exercise stress. We retrospectively examined 918 consecutive patients who underwent exercise (N = 310) or pharmacological stress (N = 608) 99mTc-tetrofosmin single-photon emission computed tomography (SPECT) with normal myocardial perfusion. LVMD was evaluated by phase analysis as the indices of phase bandwidth and phase standard deviation (PSD). During the follow-up period (2.2 ± 1.9 years), 74 major cardiac events (MCEs) occurred (7 cases of cardiac death, 17 cases of heart failure, and 50 cases of coronary intervention). In global patients, the indices of LVMD on rest images were significantly greater in patients with MCEs (bandwidth (°): 51 ± 31 vs 37 ± 21, P = .001, PSD: 14 ± 9 vs 10 ± 6, P = .001). The exercise stress bandwidth was significantly higher in patients with MCEs (62 ± 37° vs 42 ± 21°, P = .026), as was the pharmacological stress bandwidth (57 ± 35° vs 43 ± 24°, P = .006). Multivariate analysis demonstrated the exercise stress bandwidth to be an independent predictor of MCEs (HR 1.017, CI 1.003 to 1.032, P = .019), but the pharmacological stress bandwidth had no influence on MCEs. LVMD induced by exercise stress was an independent predictor of MCEs in patients with normal perfusion SPECT, whereas that induced by pharmacological stress had no association with further events.
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- 2020
7. Utility of angiography–physiology coregistration maps during percutaneous coronary intervention in clinical practice
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Koji Isodono, Tomohiko Sakatani, Yoshinori Tsubakimoto, Daisuke Irie, Akiko Matsuo, Hiroshi Fujita, Takeru Kasahara, Keiji Inoue, and Makoto Ariyoshi
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Instantaneous wave-free ratio ,Male ,medicine.medical_specialty ,medicine.medical_treatment ,Concordance ,030204 cardiovascular system & hematology ,Pullback tracing ,Coronary Angiography ,Intraoperative Period ,03 medical and health sciences ,Percutaneous Coronary Intervention ,0302 clinical medicine ,Internal medicine ,Heart rate ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,030212 general & internal medicine ,Aged ,medicine.diagnostic_test ,business.industry ,Coronary Stenosis ,Percutaneous coronary intervention ,Stent ,General Medicine ,Odds ratio ,Physiological map ,Confidence interval ,Fractional Flow Reserve, Myocardial ,Angiography ,Cardiology ,Original Article ,Female ,Stents ,Cardiology and Cardiovascular Medicine ,business ,Coregistration - Abstract
This study aimed to evaluate the utility and feasibility of physiological maps coregistered with angiograms using the pullback of a pressure guidewire with continuous instantaneous wave-free ratio (iFR) measurements. iFR pullback was obtained for 70 lesions from 70 patients with stable angina pectoris using SyncVision (Philips Corp.). Physiological maps were created, whereby the post-intervention iFR (post-iFR) was predicted as iFRpred. The iFR gap was defined if the difference between the iFRpred and post-iFR was ≥ 0.3. The lesion morphology changed from that during the physiological assessment to that during the angiographic assessment in 26 lesions (37.1%). In particular, 22.6% of angiographic tandem lesions changed to physiological focal lesions. The mean pre-intervention iFR, post-iFR, and iFRpred were 0.73 ± 0.17, 0.90 ± 0.06, and 0.93 ± 0.05, respectively. The mean difference between the iFRpred and post-iFR was 0.029 ± 0.099, with 95% limits of agreement of -0.070–0.128. iFR gaps occurred in 28 patients (40%). Notably, a new iFR gradient causing a ≥ 0.03 iFR drop after stenting occurred in 11 (15.7%) cases. The study patients were divided into two groups according to biases between post-iFR and iFRpred p = 0.027). Physiological maps under resting conditions may contribute to a reduction in unnecessary stent placements without missing lesions requiring treatment. However, the predictive accuracy of post-iFR performance in the present study was slightly lower than that in the previous reports.
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- 2020
8. Cardiovascular event risk estimated by myocardial perfusion SPECT combined with clinical data
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Tsunehiko Nishimura, Kenichi Nakajima, and Tomohiko Sakatani
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Cardiovascular event ,Tomography, Emission-Computed, Single-Photon ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Gated SPECT ,Myocardial Perfusion Imaging ,Coronary Artery Disease ,medicine.disease ,Scintigraphy ,Prognosis ,Risk Assessment ,Coronary artery disease ,Clinical trial ,Perfusion ,Internal medicine ,Survival study ,Cardiology ,medicine ,Humans ,In patient ,Cardiology and Cardiovascular Medicine ,business - Abstract
Myocardial scintigraphy plays important roles in the diagnosis of coronary artery disease, prognostic risk stratification, and determination of the treatment policy. Recently, several large-scale clinical trials reported that coronary intervention was not necessarily advantageous for preventing future cardiac events in patients with stable angina. This review summarizes how we can estimate cardiac event risks based on Japanese Assessment of Cardiac Events and Survival Study by Quantitative Gated SPECT (J-ACCESS), and describes that the combination of scintigraphy and other clinical features leads to more accurate stratification of prognosis and the determination of subsequent treatment policy.
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- 2021
9. Diagnostic Value of Atrial Fibrillation by Built-in Electrocardiogram Technology in a Blood Pressure Monitor
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Takeshi Shirayama, Hirokazu Shiraishi, Takanori Ikeda, Kentaro Nakai, Keitaro Senoo, T Okura, Tomohiko Sakatani, Tomonori Miki, Keiji Inoue, Satoaki Matoba, Tetsuhisa Hattori, and Ken Kakita
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Original article ,Arrhythmia/Electrophysiology ,Atrial fibrillation ,Catheter ablation ,General Medicine ,medicine.disease ,Ecg monitoring ,Blood pressure ,Automated algorithm ,Internal medicine ,medicine ,Cardiology ,In patient ,Sinus rhythm ,cardiovascular diseases ,Electrocardiogram (ECG) ,business ,Stroke ,Digital health - Abstract
Background: Hypertension in patients with atrial fibrillation (AF) is a known independent risk factor for stroke. The Complete blood pressure (BP) monitor (Omron Healthcare, Kyoto, Japan) was developed as the first BP monitor with electrocardiogram (ECG) capability in a single device to simultaneously monitor ECG and BP readings. This study investigated whether the Complete can accurately differentiate sinus rhythm (SR) from AF during BP measurement. Methods and Results: Fifty-six consecutive patients with persistent AF admitted for catheter ablation were enrolled in the study (mean age 65.8 years; 83.9% male). In all patients, 12-lead ECGs and simultaneous Complete recordings were acquired before and after ablation. The Complete interpretations were compared with physician-reviewed ECGs, whereas Complete recordings were reviewed by cardiologists in a blinded manner and compared with ECG interpretations. Sensitivity, specificity, and κ coefficient were also determined. In all, 164 Complete and ECG recordings were simultaneously acquired from the 56 patients. After excluding unclassified recordings, the Complete automated algorithm performed well, with 100% sensitivity, 86% specificity, and a κ coefficient of 0.87 compared with physician-interpreted ECGs. Physician-interpreted Complete recordings performed well, with 99% sensitivity, 85% specificity, and a κ coefficient of 0.85 compared with physician-interpreted ECGs. Conclusions: The Complete, which combines BP and ECG monitoring, can accurately differentiate SR from AF during BP measurement.
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- 2021
10. The frequency and clinical characteristics of in-stent restenosis due to calcified nodule development after coronary stent implantation
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Daisuke Irie, Tomohiko Sakatani, Hiroshi Fujita, Takeru Kasahara, Koji Isodono, Yoshinori Tsubakimoto, Tomotaka Fujimoto, Makoto Ariyoshi, Kenichi Fujii, Keiji Inoue, and Akiko Matsuo
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Neointima ,Male ,medicine.medical_treatment ,Lumen (anatomy) ,Coronary Artery Disease ,030204 cardiovascular system & hematology ,Coronary artery disease ,Coronary Restenosis ,03 medical and health sciences ,0302 clinical medicine ,Percutaneous Coronary Intervention ,Restenosis ,Predictive Value of Tests ,Risk Factors ,Coronary stent ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,030212 general & internal medicine ,Vascular Calcification ,Cardiac imaging ,Aged ,Retrospective Studies ,Aged, 80 and over ,business.industry ,Stent ,Middle Aged ,medicine.disease ,Coronary Vessels ,Treatment Outcome ,Female ,Stents ,Cardiology and Cardiovascular Medicine ,Nuclear medicine ,business ,Tomography, Optical Coherence ,Calcification - Abstract
The purpose of this study was to evaluated the clinical characteristics of calcified nodule-like in-stent restenosis (ISR) lesions using optical coherence tomography (OCT) in vivo. A total of 124 ISR lesions that were treated with a repeat coronary intervention under OCT guidance were included in this analysis. ISR neointimal morphology was classified as “calcified nodule-like ISR”, that appeared as a high-backscattering protruding mass with an irregular surface covered by signal-rich bands, or “non-calcified nodule-like ISR”. The maximum arc and thickness of calcium behind the stent struts was also measured. Of the 124 ISR lesions, calcified nodule-like ISR was observed in 11 lesions (9%). OCT analysis data showed that the maximum arc of calcium and the maximum calcium thickness behind the stent were significantly larger in the calcified nodule-like ISR lesions than in the non-calcified nodule-like ISR lesions (269 ± 51 vs. 179 ± 92°, p
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- 2020
11. Successful Complete Revascularization With PCI Using Super-Low Volume of Contrast Medium in a Patient With Three-Vessel Disease Including 2 Chronic Total Occlusions With Severe Renal Dysfunction
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Masayuki Kato, Keiji Inoue, Koji Isodono, Kayoko Mera, Masahiro Koide, Yoshinori Tsubakimoto, Tomohiko Sakatani, Hiroshi Fujita, Akiko Matsuo, and Kimihito Usui
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Male ,medicine.medical_specialty ,medicine.medical_treatment ,Contrast-induced nephropathy ,Contrast Media ,030204 cardiovascular system & hematology ,Coronary Angiography ,Revascularization ,03 medical and health sciences ,Percutaneous Coronary Intervention ,0302 clinical medicine ,Intravascular ultrasound ,medicine ,Humans ,Renal Insufficiency ,030212 general & internal medicine ,Aged ,medicine.diagnostic_test ,business.industry ,Retinal Vessels ,Percutaneous coronary intervention ,General Medicine ,Acute Kidney Injury ,medicine.disease ,Coronary Vessels ,Surgery ,Stenosis ,Contrast medium ,medicine.anatomical_structure ,Coronary Occlusion ,Surgery, Computer-Assisted ,Chronic Disease ,Conventional PCI ,Cardiology and Cardiovascular Medicine ,business ,Artery - Abstract
The most important factor for preventing contrast-induced nephropathy (CIN) during percutaneous coronary intervention (PCI) in patients with severe renal dysfunction is to minimize the contrast volume. Herein, we report a successful case of complete revascularization after 3 separate PCI procedures using a super-low volume of contrast medium in a patient with 3-vessel disease, including two chronic total occlusions (CTOs). A 70-year-old man having exertional angina despite maximal medical therapy was referred to our hospital. He had severe renal dysfunction (estimated glomerular filtration rate 19 mL/minute/1.73 m2). Coronary angiography, in which a total volume of 15 mL (over 3 injections) of contrast medium was used after hydration with normal saline, demonstrated 2 CTOs in the proximal left circumflex artery (LCX) and the proximal right coronary artery (RCA) as well as focal stenosis in the mid left descending artery (LAD). Because the patient refused coronary artery bypass grafting, we opted for revascularization with PCI, divided into 3 procedures. We made full use of microcatheter tip injection and evaluation with intravascular ultrasound and achieved complete revascularization with a total of 31 mL of contrast medium: 9 mL for RCA, 6 mL for LAD, and 16 mL for LCX, without the occurrence of CIN. Additionally, we present tips for performing PCI using super-low contrast medium.
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- 2017
12. Visualization of the improvement of myocardial perfusion after coronary intervention using motorized fractional flow reserve pullback curve
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Keiji Inoue, Kazuaki Takamatsu, Koji Isodono, Kayoko Mera, Yumika Tsuji, Akiko Matsuo, Hiroshi Fujita, Masahiro Koide, Yoshinori Tsubakimoto, Tomohiko Sakatani, Atsushi Kyodo, and Satoshi Shimoo
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Male ,Cardiac Catheterization ,medicine.medical_specialty ,medicine.medical_treatment ,Fractional flow reserve ,030204 cardiovascular system & hematology ,Coronary Angiography ,03 medical and health sciences ,Myocardial perfusion imaging ,Percutaneous Coronary Intervention ,0302 clinical medicine ,Pullback ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Motorized pullback curve ,030212 general & internal medicine ,Aged ,Cardiac catheterization ,Aged, 80 and over ,medicine.diagnostic_test ,business.industry ,Coronary Stenosis ,Myocardial Perfusion Imaging ,Percutaneous coronary intervention ,Stent ,General Medicine ,Middle Aged ,medicine.disease ,Coronary Vessels ,Surgery ,Fractional Flow Reserve, Myocardial ,Stenosis ,Conventional PCI ,Cardiology ,Coronary intervention ,Female ,Original Article ,Cardiology and Cardiovascular Medicine ,business - Abstract
This study aimed to evaluate the feasibility and utility of using motorized pullback of the pressure guidewire to provide a graphic assessment and prediction of the benefits of coronary intervention. Fractional flow reserve (FFR) measurements were performed with motorized pullback imaging in 20 patients who underwent successful percutaneous coronary intervention (PCI) of the left anterior descending artery. Physiological lesion length (PLL) was calculated using frame counts to determine stent length. FFR area was calculated by integrating the FFR values recorded during pullback tracing (FFRarea). The percentage increase in FFR area (%FFRarea) was defined as the ratio of the difference between the pre- and post-intervention FFRarea to the total frame count. The average FFR values were enhanced following PCI, from 0.64 to 0.82, and the median value of the difference between pre- and post-interventional FFR values (D-FFR) and %FFRarea were 0.13 and 10.6%, respectively. The %FFRarea demonstrated a significant positive correlation with D-FFR (R 2, 0.61; p
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- 2016
13. Optical Coherence Tomography (OCT) Findings of Coronary Computed Tomography Angiography (CTA) Detected Vulnerable Plaque
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Hiroshi Fujita, Keiji Inoue, Koji Isodono, Akiko Matsuo, Toru Tanigaki, Akira Sakamoto, Tomohiko Sakatani, Kohei Kawamura, Shinzo Kimura, and Yoshinori Tsubakimoto
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medicine.medical_specialty ,Acute coronary syndrome ,Optical coherence tomography ,medicine.diagnostic_test ,business.industry ,Multidetector computed tomography ,medicine ,Coronary computed tomography angiography ,Radiology ,medicine.disease_cause ,business ,medicine.disease ,Vulnerable plaque - Published
- 2014
14. Cholesterol crystal depth in coronary atherosclerotic plaques: A novel index of plaque vulnerability using optical frequency domain imaging
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Atsushi Kyodo, Yoshinori Tsubakimoto, Koji Isodono, Masahiro Koide, Akiko Matsuo, Satoshi Shimoo, Kazuaki Takamatsu, Keiji Inoue, Hiroshi Fujita, Kayoko Mera, Tomohiko Sakatani, and Yumika Tsuji
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Male ,Pathology ,Cardiovascular Procedures ,medicine.medical_treatment ,lcsh:Medicine ,030204 cardiovascular system & hematology ,Pathology and Laboratory Medicine ,Biochemistry ,Vascular Medicine ,Angina ,chemistry.chemical_compound ,White Blood Cells ,0302 clinical medicine ,Optical frequencies ,Animal Cells ,Medicine and Health Sciences ,030212 general & internal medicine ,lcsh:Science ,Coronary Arteries ,Multidisciplinary ,Optical Imaging ,Arteries ,Middle Aged ,Domain imaging ,Coronary Vessels ,Lipids ,Plaque, Atherosclerotic ,medicine.anatomical_structure ,Cholesterol ,Physical Sciences ,Cardiology ,Female ,Cellular Types ,Anatomy ,Research Article ,Acute coronary syndrome ,medicine.medical_specialty ,Materials by Structure ,Immune Cells ,Materials Science ,Immunology ,Surgical and Invasive Medical Procedures ,Crystals ,03 medical and health sciences ,Signs and Symptoms ,Diagnostic Medicine ,Internal medicine ,medicine ,Humans ,Angina, Stable ,Thrombus ,Aged ,Blood Cells ,business.industry ,Macrophages ,lcsh:R ,Angioplasty ,Percutaneous coronary intervention ,Biology and Life Sciences ,Cell Biology ,medicine.disease ,Coronary arteries ,chemistry ,Lesions ,Cardiovascular Anatomy ,Blood Vessels ,lcsh:Q ,business ,Coronary Angioplasty - Abstract
Background The involvement of cholesterol crystals (CCs) in plaque progression and destabilization of atherosclerotic plaques has been recently recognized. This study aimed to evaluate the association between the intraplaque localization of CCs and plaque vulnerability. Methods We investigated 55 acute coronary syndrome (ACS) and 80 stable angina pectoris (stable AP) lesions using optical frequency domain imaging (OFDI) prior to percutaneous coronary intervention. The distance between CCs and the luminal surface of coronary plaques was defined as CC depth. Results Although the incidence of CCs had similar frequencies in the ACS and stable AP groups (95% vs. 89%, p = 0.25), CC depth was significantly less in patients with ACS than in those with stable AP (median [25th to 75th percentile]: 68 μm [58 to 92 μm] vs. 152 μm [115 to 218 μm]; p < 0.001). The incidences of plaque rupture, thrombus, lipid-rich plaques, and thin-cap fibroatheroma were significantly greater in patients with ACS than in those with stable AP (62% vs. 18%, p < 0.001; 67% vs. 16%, p < 0.001; 84% vs. 57%, p < 0.01; and 56% vs. 19%, p < 0.001, respectively). Conclusion OFDI analysis revealed that CCs were found in the more superficial layers within the coronary atherosclerotic plaques in patients with ACS than in those with stable AP, suggesting that CC depth is associated with plaque vulnerability. CC depth, a novel OFDI-derived parameter, could be potentially used as an alternative means of evaluating plaque vulnerability in coronary arteries.
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- 2016
15. Clinical implications of coronary pressure measurement after stent implantation
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Tomohiko Sakatani, Takashi Shimonaga, Akiko Matsuo, Sinzo Kimura, Toru Tanigaki, Hiroshi Fujita, Akira Ueoka, Keiji Inoue, Makoto Kitamura, and Yoshinori Tsubakimoto
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Male ,medicine.medical_specialty ,medicine.medical_treatment ,Fractional flow reserve ,Balloon ,Coronary Restenosis ,Text mining ,Angioplasty ,Internal medicine ,Myocardial Revascularization ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Postoperative Period ,Angioplasty, Balloon, Coronary ,Aged ,medicine.diagnostic_test ,business.industry ,Coronary Stenosis ,Stent ,Drug-Eluting Stents ,Interventional radiology ,General Medicine ,Odds ratio ,Middle Aged ,Confidence interval ,Fractional Flow Reserve, Myocardial ,Treatment Outcome ,Cardiology ,Female ,Radiology ,Cardiology and Cardiovascular Medicine ,business ,Follow-Up Studies - Abstract
This study investigated the effect of fractional flow reserve (FFR) after stent implantation on clinical outcomes. Pressurewire measurements and follow-up data were obtained after stent implantation. Regarding the end point, target lesion revascularization (TLR) occurred in 11 patients (15.9 %). Patients with TLR had higher frequencies of multiple stenting (54.5 vs. 19.0 %, p = 0.01), lower post-interventional FFRs (0.84 vs. 0.88, p = 0.01), and longer stent lengths (42.20 vs. 27.69 mm, p = 0.01) than patients without TLR. The post-interventional FFR cutoff for TLR was 0.79, although this value had a weak discriminatory ability. However, multivariate analysis did not show any significant independent predictors of TLR (odds ratio 6.33; confidence interval 0.75–53.4, p = 0.09). Post-interventional FFR values were not significantly associated with TLR when a sub-analysis was performed in patients who underwent only drug-eluting stent (DES) implantation. It was difficult to achieve post-interventional FFRs of 0.9 or greater. DES implantation eliminated the effect of post-interventional FFR on TLR. Post-interventional FFR was not able to predict TLR in the present study.
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- 2012
16. Usefulness of the novel risk estimation software, Heart Risk View, for the prediction of cardiac events in patients with normal myocardial perfusion SPECT
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Kayoko Mera, Tomohiko Sakatani, Yumika Tsuji, Koji Isodono, Akiko Matsuo, Yoshinori Tsubakimoto, Masahiro Koide, Hiroshi Fujita, Satoshi Shimoo, Keiji Inoue, Atsushi Kyodo, and Kazuaki Takamatsu
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Male ,medicine.medical_specialty ,Myocardial Ischemia ,030204 cardiovascular system & hematology ,Risk Assessment ,030218 nuclear medicine & medical imaging ,Coronary artery disease ,03 medical and health sciences ,Myocardial perfusion imaging ,0302 clinical medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Myocardial infarction ,Prospective cohort study ,Event (probability theory) ,Aged ,Tomography, Emission-Computed, Single-Photon ,medicine.diagnostic_test ,business.industry ,Myocardial Perfusion Imaging ,General Medicine ,medicine.disease ,Heart failure ,Female ,Radiology ,business ,Risk assessment ,Perfusion ,Software - Abstract
Myocardial perfusion single-photon emission-computed tomography (SPECT) can predict cardiac events in patients with coronary artery disease with high accuracy; however, pseudo-negative cases sometimes occur. Heart Risk View, which is based on the prospective cohort study (J-ACCESS), is a software for evaluating cardiac event probability. We examined whether Heart Risk View was useful to evaluate the cardiac risk in patients with normal myocardial perfusion SPECT (MPS). We studied 3461 consecutive patients who underwent MPS to detect myocardial ischemia and those who had normal MPS were enrolled in this study (n = 698). We calculated cardiac event probability by Heart Risk View and followed-up for 3.8 ± 2.4 years. The cardiac events were defined as cardiac death, non-fatal myocardial infarction, and heart failure requiring hospitalization. During the follow-up period, 21 patients (3.0 %) had cardiac events. The event probability calculated by Heart Risk View was higher in the event group (5.5 ± 2.6 vs. 2.9 ± 2.6 %, p
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- 2016
17. Clinical Outcome After Permanent Pacemaker Implantation in Patients With a High Percentage of Ventricular Pacing
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Akiko Matsuo, Makoto Kitamura, Koji Isodono, Kohei Kawamura, Hiroshi Fujita, Keiji Inoue, Yoshinori Tsubakimoto, Toru Tanigaki, Tomohiko Sakatani, Akira Sakamoto, and Shinzo Kimura
- Subjects
Male ,medicine.medical_specialty ,Comparative Effectiveness Research ,Pacemaker, Artificial ,Heart Ventricles ,Ventricular Septum ,Sick sinus syndrome ,QRS complex ,Basal (phylogenetics) ,Japan ,Internal medicine ,Prosthesis Fitting ,Atrial Fibrillation ,medicine ,Humans ,Atrial Appendage ,Atrioventricular Block ,Tinea Capitis ,Aged ,Aged, 80 and over ,Sick Sinus Syndrome ,Ejection fraction ,business.industry ,Incidence (epidemiology) ,Cardiac Pacing, Artificial ,Atrial fibrillation ,General Medicine ,medicine.disease ,Outcome and Process Assessment, Health Care ,Treatment Outcome ,Heart failure ,cardiovascular system ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business ,Atrioventricular block - Abstract
Previous reports have suggested that right ventricular apical pacing may lead to cardiac dysfunction. Septal pacing is thought to be superior to apical pacing in the prevention of cardiac dyssynchrony, however, there have been no reports on the contribution of septal pacing to improving clinical outcome.We retrospectively evaluated factors associated with cardiac events in patients with right ventricular pacing.The study population consisted of 256 consecutive patients newly implanted with permanent pacemakers and followed-up for 29 ± 18 months. Cardiac events, consisting of cardiac death or heart failure requiring hospitalization, occurred in 22 patients. Kaplan-Meier curves revealed that patients with a high percentage of ventricular pacing (> 90%, n = 101, group H) had a higher incidence of cardiac events than patients with a low percentage of ventricular pacing (< 10%, n = 83, group L) (P = 0.002). In group H, multivariate analysis showed that age (HR: 1.174, 95%CI: 1.066-1.291, P = 0.001), ejection fraction (EF) (HR: 0.898, 95%CI: 0.836-0.964, P = 0.003), QRS duration during cardiac pacing (HR: 1.059, 95%CI: 1.017-1.103, P = 0.006), and existing basal cardiac diseases (HR: 13.080, 95%CI: 2.463-69.479, P = 0.003) were significant predictors of cardiac events, although pacing site had no significant association with prognosis (P = 0.56).Higher age, lower EF, longer QRS duration during cardiac pacing, and existing basal cardiac diseases are associated with poor prognosis in patients with a high percentage of ventricular pacing.
- Published
- 2015
18. Importance of measuring the fractional flow reserve in patients receiving hemodialysis
- Author
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Yoshinori Tsubakimoto, Makoto Kitamura, Akira Ueoka, Hiroshi Fujita, Masato Nishimura, Tomohiko Sakatani, Keiji Inoue, Akiko Matsuo, Yoshiaki Shimoda, Naoki Maruyama, and Eigo Kishita
- Subjects
medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,medicine.medical_treatment ,Ischemia ,Mean Aortic Pressure ,Interventional radiology ,General Medicine ,Fractional flow reserve ,medicine.disease ,Coronary artery disease ,Stenosis ,Internal medicine ,Angiography ,medicine ,Cardiology ,Radiology, Nuclear Medicine and imaging ,Hemodialysis ,Radiology ,Cardiology and Cardiovascular Medicine ,business - Abstract
Angiography is not always an accurate indicator of physiologically significant stenosis. We examined the usefulness of functional evaluation of coronary stenosis severity by determining the fractional flow reserve (FFR) using a pressure wire in patients who received hemodialysis with angiographically intermediate lesions. We recruited 44 patients with intermediate lesions; of these, 22 were undergoing hemodialysis while 22 were not. Quantitative coronary angiography (QCA) was performed to measure the minimal lumen diameter (MLD) and calculate the percent diameter stenosis (%DS). The FFR was calculated as the ratio of the coronary pressure at the distal stenotic site to the mean aortic pressure during maximum hyperemia. In each group, we investigated the relationship between the FFR and %DS and FFR and MLD. The patients in the hemodialysis group were significantly younger and had more calcified and type B2/C lesions than those in the non-dialysis group. Although the FFR was correlated with both %DS (r = 0.71, p
- Published
- 2011
19. A case report: 201Tl/99mTc-Pyrophosphate dual-isotope myocardial SPECT for detecting annular subendocardial infarction induced by a transient shock
- Author
-
Naoki Makita, Yoshiaki Shimoda, Tetsuya Tanaka, Akiko Matsuo, Kiyonari Matsuo, Makoto Kitamura, Keiji Inoue, Shinji Seto, Toshiyuki Ootomo, Yasutsugu Shiono, Morihiko Kondou, Kazuto Yamamoto, Tomohiko Sakatani, Hiroshi Fujita, and Yoshinori Tsubakimoto
- Subjects
ST depression ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Ischemia ,Percutaneous coronary intervention ,Infarction ,medicine.disease ,Article ,Angina ,Internal medicine ,Right coronary artery ,medicine.artery ,Shock (circulatory) ,cardiovascular system ,medicine ,Cardiology ,Dual-isotope myocardial SPECT ,cardiovascular diseases ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,Annular subendocardial infarction ,Transient shock ,Endocardium - Abstract
SummaryThe patient was a 74-year-old woman with angina pectoris, who had undergone percutaneous coronary intervention with stent placement in the right coronary artery on October 2, 2007. On November 12 of the same year, she suffered from paroxysmal atrial fibrillation. She was treated with pilsicainide hydrochloride administered by intravenous injection, which was followed by a sudden sinus standstill, with marked bradycardia and a shock state. The patient was then treated with a catecholamine, however, the shock state persisted for about an hour. An electrocardiogram revealed persistent ST depression in leads V4–6 along with elevation of the serum creatinine kinase. A coronary angiography performed on the admission day revealed no abnormality. On the third hospital day, a dual-isotope myocardial SPECT using 201Tl and 99mTc-pyrophosphate demonstrated an annular accumulation of 99mTc-pyrophosphate concordant with the endocardium from apex to the mid-portion of the left ventricle, suggestive of subendocardial infarction. The case is reported here, as there are few reports of subendocardial infarction developing due to ischemia arising from a shock state.
- Published
- 2010
20. Chronotropic incompetence and autonomic dysfunction in patients without structural heart disease
- Author
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Hiroki Sugihara, Satoshi Kaimoto, Shigeyuki Miki, Toshiro Kuribayashi, Tatsuya Kawasaki, Hiroaki Matsubara, Tomohiko Sakatani, and Tadaaki Kamitani
- Subjects
Male ,Chronotropic ,medicine.medical_specialty ,Heart disease ,Blood Pressure ,Heart Rate ,Physiology (medical) ,Internal medicine ,Heart rate ,medicine ,Humans ,Heart rate variability ,Aged ,business.industry ,Heart ,Vagus Nerve ,Middle Aged ,medicine.disease ,Pathophysiology ,Cardiovascular physiology ,Vagus nerve ,Blood pressure ,Autonomic Nervous System Diseases ,Exercise Test ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
Aims An attenuated heart rate response to exercise, termed chronotropic incompetence (CI), has been reported to be an independent predictor of cardiovascular mortality. We examined the change in autonomic function during exercise testing and correlated the results with CI. Methods and results Exercise testing using a bicycle ergometer was performed in 172 patients who had no evidence of cardiac disease. Chronotropic incompetence was defined as the failure to achieve 85% of the age-predicted maximum heart rate, heart rate reserve
- Published
- 2010
21. Cardiac Hypertrophy Diminished the Effects of Isoproterenol on Delayed Rectifier Potassium Current in Rat Heart
- Author
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Hirokazu Shiraishi, Takeshi Shirayama, Tomohiko Sakatani, Taku Yamamoto, Hiroaki Matsubara, and Hiroki Mani
- Subjects
Male ,medicine.medical_specialty ,Patch-Clamp Techniques ,Sympathetic Nervous System ,IBMX ,Calcium Channels, L-Type ,Phosphodiesterase Inhibitors ,Physiology ,Action Potentials ,Left ventricular hypertrophy ,Muscle hypertrophy ,chemistry.chemical_compound ,1-Methyl-3-isobutylxanthine ,Internal medicine ,medicine ,Animals ,Repolarization ,Myocytes, Cardiac ,Patch clamp ,Rats, Wistar ,Sympathomimetics ,Phosphodiesterase inhibitor ,Forskolin ,Phosphoric Diester Hydrolases ,business.industry ,Colforsin ,Isoproterenol ,Phosphodiesterase ,Heart ,Adrenergic beta-Agonists ,medicine.disease ,Rats ,Endocrinology ,chemistry ,Potassium ,cardiovascular system ,Cardiology ,Hypertrophy, Left Ventricular ,business ,Delayed Rectifier Potassium Channels ,Signal Transduction - Abstract
We investigated the association between sympathetic nerve activity and delayed rectifier potassium current (I(K)) in hypertrophic rat hearts. Left ventricular hypertrophy was induced by a 50% constriction of suprarenal abdominal aorta for 6 weeks. The effects of isoproterenol on action potential duration (APD), I(K), and L-type calcium current (I(Ca)) were investigated using the whole-cell patch clamp technique. In hypertrophic rats, I(K) was decreased by 28.2%, resulting in significant APD(90) (90% repolarization) prolongation (sham: 55 +/- 3.9, hypertrophy: 98 +/- 11 ms, P = 0.01). Isoproterenol (100 nM)-stimulated I(K) was increased by 54.9% +/- 0.10% in sham-operated rats, but not in hypertrophic rats. On the other hand, isoproterenol increased I(Ca) in both sham-operated (77.7% +/- 7.6%) and hypertrophic rats (69.6% +/- 9.7%). Consequently, isoproterenol prolonged further APD in hypertrophic rats (98 +/- 11 vs. 145 +/- 8.6 ms, P0.01), but not in sham-operated rats (55 +/- 3.9 vs. 61 +/- 5.6 ms, n.s.). Forskolin (1 microM, an adenylyl cyclase stimulator) did not enhance I(K) in hypertrophic rats, but IBMX (100 microM, a nonselective phosphodiesterase inhibitor) enhanced the current (30.2 +/- 0.05%), as much as in sham-operated rats. We concluded that in hypertrophic hearts, I(K) was not increased by isoproterenol because of the enhanced activity of phosphodiesterase, which leads to excessive APD prolongation.
- Published
- 2006
22. The Association Between Cholesterol and Mortality in Heart Failure Comparison Between Patients With and Without Coronary Artery Disease
- Author
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Yoko Suzaki, Hiroaki Matsubara, Takeshi Shirayama, Taku Yamamoto, Tatsuya Kawasaki, Tomohiko Sakatani, Hiroki Mani, and Hiroki Sugihara
- Subjects
medicine.medical_specialty ,Multivariate analysis ,business.industry ,Cholesterol ,General Medicine ,Odds ratio ,medicine.disease ,Confidence interval ,Coronary artery disease ,chemistry.chemical_compound ,chemistry ,Internal medicine ,Heart failure ,Cardiology ,Medicine ,Risk factor ,Cardiology and Cardiovascular Medicine ,business ,Survival rate - Abstract
Hypercholesterolemia is a risk factor for development of coronary artery disease (CAD), however, several reports have suggested that low serum cholesterol is associated with a worse prognosis in patients with congestive heart failure (CHF). The objective of this study was to determine the prognostic value of cholesterol for CHF. The study subjects consisted of 133 consecutive patients hospitalized in our institution for progressive heart failure from April 2000 to March 2003. Thirty-two percent of the patients had CAD. After improvement of congestive heart failure and discharge from the hospital, lipid profiles, including serum total cholesterol (TC), triglycerides, and high and low density lipoprotein cholesterol (HDL, LDL, respectively), were obtained. During the follow-up period (2.3 +/- 0.9 years), 21 patients died. There was a significant difference between survivors and nonsurvivors in HDL (53 +/- 15, 43 +/- 15 mg/dL, P = 0.01), but no differences were observed in other variables. In patients with CAD, survivors had significantly lower TC concentrations (179 +/- 30 versus 246 +/- 55 mg/dL, P = 0.004), although in patients without CAD, survivors had significantly higher TC concentrations (203 +/- 37 versus 170 +/- 40 mg/dL, P = 0.02). Multivariate analysis showed high TC predicted a worse outcome in patients with CAD (odds ratio (OR) = 1.052, 95% confidence interval (CI) 1.002-1.104, P = 0.04), but a better outcome in patients without CAD (OR = 0.972, 95% CI 0.948-0.997, P = 0.03), independent of age, gender, medication, and complications. Thus, low serum cholesterol is associated with an improved outcome in patients with CAD, while it predicts a worse outcome in patients without CAD.
- Published
- 2005
23. Usefulness of the Percentage of Plasma Lymphocytes as a Prognostic Marker in Patients With Congestive Heart Failure: Comparison With Brain Natriuretic Peptide
- Author
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Hiroki Sugihara, Tomohiko Sakatani, Tadaaki Kamitani, Shingo Kawasaki, Mitsuyoshi Hadase, and Tatsuya Kawasaki
- Subjects
medicine.medical_specialty ,Univariate analysis ,business.industry ,Diastole ,Atrial fibrillation ,Brain natriuretic peptide ,medicine.disease ,medicine.anatomical_structure ,Epinephrine ,Ventricle ,Internal medicine ,Heart failure ,medicine ,Cardiology ,Systole ,Cardiology and Cardiovascular Medicine ,business ,medicine.drug - Abstract
This prospective study was designed to evaluate the prognostic value of the percentage of plasma lymphocytes in patients with diastolic dysfunction as well as systolic dysfunction of the left ventricle. The subjects were 70 consecutive patients who were hospitalized in our institution from April 2001 to August 2002. Following the improvement of congestive heart failure, leukocyte differentiation and neurohumoral factors (plasma levels of atrial and brain natriuretic peptide, norepinephrine, epinephrine, and dopamine) were measured. During the follow-up period (17 +/- 9 months), 18 patients experienced a cardiac event. In the univariate analysis, the percentage of plasma lymphocytes in the cardiac event group was significantly less than that in the noncardiac event group (24.7 +/- 8.40 vs 33.3 +/- 7.64%, P = 0.0006), and brain natriuretic peptide was significantly larger in the cardiac event group (402 +/- 168 vs 153 +/- 51 pg/mL, P = 0.04). However, in patients with preserved systolic function, there was a significant difference in the percentage of plasma lymphocytes between the cardiac and noncardiac event groups (21.7 +/- 9.42 vs 34.2 +/- 8.21%, P = 0.037), although no difference was observed in brain natriuretic peptide (133 +/- 43 vs 125 +/- 50 pg/mL, P = 0.87). Multivariate analysis showed the percentage of plasma lymphocytes was an independent predictor of a cardiac event. The percentage of plasma lymphocytes may be useful for predicting the course of patients with congestive heart failure based on diastolic dysfunction as well as systolic dysfunction.
- Published
- 2004
24. Prognostic value of heart rate variability in patients with hypertrophic cardiomyopathy
- Author
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Shingo Kawasaki, Hiroki Sugihara, Tomohiko Sakatani, Toshiro Kuribayashi, Tatsuya Kawasaki, Tadaaki Kamitani, Mitsuyoshi Hadase, and Akihiro Azuma
- Subjects
Adult ,Male ,medicine.medical_specialty ,Heart disease ,Cardiomyopathy ,Sensitivity and Specificity ,Sudden death ,Syncope ,Japan ,Heart Rate ,Predictive Value of Tests ,Risk Factors ,Internal medicine ,Heart rate ,medicine ,Humans ,Heart rate variability ,cardiovascular diseases ,Aged ,medicine.diagnostic_test ,business.industry ,Incidence ,Hypertrophic cardiomyopathy ,Cardiomyopathy, Hypertrophic ,Middle Aged ,Prognosis ,medicine.disease ,Survival Analysis ,Echocardiography ,Heart failure ,Multivariate Analysis ,Electrocardiography, Ambulatory ,cardiovascular system ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business ,Anti-Arrhythmia Agents ,Electrocardiography ,Follow-Up Studies - Abstract
Hypertrophic cardiomyopathy (HCM) have been reported to display impaired heart rate variability, although little is known regarding its prognostic value. By using fast Fourier transformation of 24-hour Holter recordings in 73 HCM patients at a stable clinical condition, we computed 4 spectral components: very low frequency, low frequency, high frequency, and total power. During 28 months, 7 HCM patients experienced death or acquired hospitalization for heart failure. Sudden death did not occurred. High frequency component was lower in HCM patients with cardiac events than that in patients without cardiac events (3.78 +/- 0.66 vs. 4.43 +/- 0.92 In(ms(2)), P =.045). There were no significant differences in other heart rate variability variables between HCM patients with and without cardiac events. In multivariate analysis, high frequency component remained to be an independent predictor of cardiac events (relative risk=0.10, 95% CI 0.01-0.73, P =.023). Heart rate variability analysis is predictive of heart failure in our cohort of HCM patients, whereas its predictive value of sudden death remains unclear.
- Published
- 2003
25. Usefulness of Paroxetine in Depressed Men With Paroxysmal Atrial Fibrillation
- Author
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Takeshi Shirayama, Hiroki Mani, Takashi Sakamoto, Taku Yamamoto, Tomohiko Sakatani, and Hiroaki Matsubara
- Subjects
Adult ,medicine.medical_specialty ,Heart disease ,Nausea ,Pharmacotherapy ,Internal medicine ,Atrial Fibrillation ,Humans ,Medicine ,Vagal tone ,Vagovagal reflex ,Depression ,business.industry ,Atrial fibrillation ,Middle Aged ,medicine.disease ,Paroxetine ,Anesthesia ,Cardiology ,Antidepressant ,Drug Therapy, Combination ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,Anti-Arrhythmia Agents ,Selective Serotonin Reuptake Inhibitors ,medicine.drug - Abstract
The occurrence and the duration of paroxysmal atrial fibrillation (AF) are influenced by vagal tone. Paroxetine, an antidepressant, can modulate vagal tone at the level of the mid-brain and inhibit the vasovagal reflex. In this study, oral paroxetine 10 mg/day was administered to patients with multidrug-resistant paroxysmal AF. Nine consecutive men responded favorably to the drug. In 3 patients, AF resolved completely. One patient could not tolerate the drug because of nausea and nervousness. These preliminary results suggest that paroxetine could be a choice in the pharmacologic treatment of paroxysmal AF.
- Published
- 2006
26. [Clinical characteristics of patients diagnosed as high cardiac event probability by 'Heart Risk View']
- Author
-
Tomohiko, Sakatani, Akira, Ueoka, Naoki, Maruyama, Yoshiaki, Shimoda, Eigo, Kishita, Yoshinori, Tsubakimoto, Akiko, Matsuo, Keiji, Inoue, Hiroshi, Fujita, Makoto, Kitamura, and Tsunehiko, Nishimura
- Subjects
Male ,Tomography, Emission-Computed, Single-Photon ,Heart Diseases ,Humans ,Female ,Software ,Aged ,Probability - Abstract
"Heart Risk View" is the software to evaluate the cardiac event probability, and it is based on the results of the prospective cohort study (J-ACCESS). We examined the usefulness of this software. Study population consisted of 83 patients, who were diagnosed that cardiac event probability was over 20% by "Heart Risk View." During the follow-up period (596 +/- 356 days), cardiac event occurred in 23 patients (27.7%), including 7 patients death. No significant differences were observed in the ejection fraction by Quantitative Gated SPECT, total defect score calculated from SPECT, and the percentage of stress perfusion abnormality detected by SPECT between event and non-event groups. However, the percentage of cardiac revascularization therapy based on the SPECT was significantly lower in the event group (9 vs. 38%, p = 0.03). In conclusion, cardiac event probability calculated by "Heart Risk View" was reliable in our study cohort. Cardiac event strongly depended on the cardiac ischemia, for which the therapy was difficult because of lesion complexity or combined diseases.
- Published
- 2012
27. Enhanced activity of ventricular Na+-HCO3- cotransport in pressure overload hypertrophy
- Author
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Hiroaki Matsubara, Takeshi Shirayama, Tomosaburo Takahashi, Tetsuro Takamatsu, Taku Yamamoto, Tomohiko Sakatani, Kenneth W. Spitzer, and Hideo Tanaka
- Subjects
Male ,medicine.medical_specialty ,Time Factors ,Transcription, Genetic ,Physiology ,Intracellular pH ,Heart Ventricles ,Losartan ,Muscle hypertrophy ,Membrane Potentials ,Physiology (medical) ,Internal medicine ,medicine ,Myocyte ,Animals ,Myocytes, Cardiac ,Aorta, Abdominal ,RNA, Messenger ,Rats, Wistar ,Ligation ,Membrane potential ,Pressure overload ,Chemistry ,Sodium-Bicarbonate Symporters ,Hydrogen-Ion Concentration ,Rats ,Up-Regulation ,Disease Models, Animal ,Endocrinology ,Circulatory system ,Hypertension ,Hypertrophy, Left Ventricular ,Sodium-Potassium-Exchanging ATPase ,Cardiology and Cardiovascular Medicine ,Cotransporter ,Angiotensin II Type 1 Receptor Blockers ,Intracellular - Abstract
The Na+-HCO3− cotransporter (NBC) plays a key role in intracellular pH (pHi) regulation in normal ventricular muscle. However, the state of NBC in nonischemic hypertrophied hearts is unresolved. In this study, we examined functional and molecular properties of NBC in adult rat ventricular myocytes. The cells were enzymatically isolated from both normal and hypertrophied hearts. Ventricular hypertrophy was induced by pressure overload created by suprarenal abdominal aortic constriction of 50% for 7 wk. pHi was measured in single cells using the fluorescent pH indicator 2′,7′-bis(2-carboxyethyl)5-( 6 )carboxyfluorescein. Real-time PCR analysis was used to quantitatively assess expression of NBC-encoding mRNA, including SLC4A4 (encoding electrogenic NBC, NBCe1) and SLC4A7 (electroneutral NBC, NBCn1). Our results demonstrate that: 1) mRNA levels of both the electrogenic NBCe1 (SLC4A4) and electroneutral NBCn1 (SLC4A7) forms of NBC were increased by aortic constriction, 2) the onset of NBC upregulation occurred within 3 days after constriction, 3) normal and hypertrophied ventricles displayed regional differences in NBC expression, 4) acid extrusion via NBC ( JNBC) was increased significantly in hypertrophied myocytes, 5) although acid extrusion via Na+/H+ exchange was also increased in hypertrophied myocytes, the relative enhancement of JNBC was larger, 6) membrane depolarization markedly increased JNBC in hypertrophied myocytes, and 7) losartan, an ANG II AT1 receptor antagonist, significantly attenuated the upregulation of both NBCs induced by 3 wk of aortic constriction. Enhanced NBC activity during hypertrophic development provides a mechanism for intracellular Na+ overload, which may render the ventricles more vulnerable to Ca2+ overload during ischemia-reperfusion.
- Published
- 2007
28. The association between cholesterol and mortality in heart failure. Comparison between patients with and without coronary artery disease
- Author
-
Tomohiko, Sakatani, Takeshi, Shirayama, Yoko, Suzaki, Taku, Yamamoto, Hiroki, Mani, Tatsuya, Kawasaki, Hiroki, Sugihara, and Hiroaki, Matsubara
- Subjects
Adult ,Aged, 80 and over ,Heart Failure ,Male ,Cholesterol, HDL ,Cholesterol, LDL ,Coronary Artery Disease ,Middle Aged ,Prognosis ,Survival Rate ,Cholesterol ,Treatment Outcome ,Risk Factors ,Humans ,Female ,Triglycerides ,Aged - Abstract
Hypercholesterolemia is a risk factor for development of coronary artery disease (CAD), however, several reports have suggested that low serum cholesterol is associated with a worse prognosis in patients with congestive heart failure (CHF). The objective of this study was to determine the prognostic value of cholesterol for CHF. The study subjects consisted of 133 consecutive patients hospitalized in our institution for progressive heart failure from April 2000 to March 2003. Thirty-two percent of the patients had CAD. After improvement of congestive heart failure and discharge from the hospital, lipid profiles, including serum total cholesterol (TC), triglycerides, and high and low density lipoprotein cholesterol (HDL, LDL, respectively), were obtained. During the follow-up period (2.3 +/- 0.9 years), 21 patients died. There was a significant difference between survivors and nonsurvivors in HDL (53 +/- 15, 43 +/- 15 mg/dL, P = 0.01), but no differences were observed in other variables. In patients with CAD, survivors had significantly lower TC concentrations (179 +/- 30 versus 246 +/- 55 mg/dL, P = 0.004), although in patients without CAD, survivors had significantly higher TC concentrations (203 +/- 37 versus 170 +/- 40 mg/dL, P = 0.02). Multivariate analysis showed high TC predicted a worse outcome in patients with CAD (odds ratio (OR) = 1.052, 95% confidence interval (CI) 1.002-1.104, P = 0.04), but a better outcome in patients without CAD (OR = 0.972, 95% CI 0.948-0.997, P = 0.03), independent of age, gender, medication, and complications. Thus, low serum cholesterol is associated with an improved outcome in patients with CAD, while it predicts a worse outcome in patients without CAD.
- Published
- 2005
29. Clinical significance of preserving spontaneous QRS wave in the therapy of DDD pacing for sick sinus syndrome
- Author
-
Yoko Suzaki, Tomohiko Sakatani, Midori Yamamura, Hiroaki Matsubara, Takeshi Shirayama, Takashi Sakamoto, Hiroki Mani, and Masafumi Taniwaki
- Subjects
Cardiac function curve ,Male ,medicine.medical_specialty ,Heart Valve Diseases ,Sick sinus syndrome ,QRS complex ,Internal medicine ,Natriuretic Peptide, Brain ,medicine ,Humans ,Aged ,Dual Chamber Pacemaker ,Echocardiography, Doppler, Pulsed ,Sick Sinus Syndrome ,business.industry ,Cardiac Pacing, Artificial ,General Medicine ,medicine.disease ,Brain natriuretic peptide ,Crossover study ,Hypertensive heart disease ,SSS ,Echocardiography ,cardiovascular system ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business ,Cardiomyopathies - Abstract
The aim of this clinical crossover study was to elucidate the effects of atrioventricular (AV) synchronous pacing on cardiac function in patients with sick sinus syndrome (SSS). Thirty SSS patients, each with dual chamber pacemaker (DDD), were enrolled and divided into two groups based on echocardiographic findings. Group A (n = 16) had hypertensive heart disease (wall thickness 11 approximately 12 mm) or mitral or aortic regurgitation (Grade I or II). Group B (n = 14) had no organic heart disease. Three successive 3-month pacing periods were tested. For the first 3 months, long AV delay that achieved > 80% ventricular sensing was chosen. For the next 3 months, AV delay was abbreviated to achieve > 80% ventricular pacing at an optimal AV interval. For the final 3 months, the first setting was resumed. At the end of each period, M mode echocardiography, pulsed-Doppler study, and measurement of plasma brain natriuretic peptide (BNP) level were conducted. In both groups, echocardiographic parameters were not significantly changed during the evaluation. In group A, plasma BNP level was significantly higher at the end of the short AV delay period than at the long AV delay period (P = 0.009), while in group B it did not differ during each period. AV synchronous pacing (> 80% ventricular pacing) in the SSS patients with a DDD pacemaker implanted could increase the ventricular load, and it is better to preserve the spontaneous QRS with the DDD mode with prolonged AV delay in patients with mild hypertensive or valvular disease.
- Published
- 2004
30. Usefulness of the percentage of plasma lymphocytes as a prognostic marker in patients with congestive heart failure
- Author
-
Tomohiko, Sakatani, Mitsuyoshi, Hadase, Tatsuya, Kawasaki, Tadaaki, Kamitani, Shingo, Kawasaki, and Hiroki, Sugihara
- Subjects
Adult ,Aged, 80 and over ,Heart Failure ,Male ,Systole ,Middle Aged ,Prognosis ,Plasma ,Ventricular Dysfunction, Left ,Catecholamines ,Atrial Fibrillation ,Natriuretic Peptide, Brain ,Humans ,Female ,Lymphocyte Count ,Prospective Studies ,Biomarkers ,Aged - Abstract
This prospective study was designed to evaluate the prognostic value of the percentage of plasma lymphocytes in patients with diastolic dysfunction as well as systolic dysfunction of the left ventricle. The subjects were 70 consecutive patients who were hospitalized in our institution from April 2001 to August 2002. Following the improvement of congestive heart failure, leukocyte differentiation and neurohumoral factors (plasma levels of atrial and brain natriuretic peptide, norepinephrine, epinephrine, and dopamine) were measured. During the follow-up period (17 +/- 9 months), 18 patients experienced a cardiac event. In the univariate analysis, the percentage of plasma lymphocytes in the cardiac event group was significantly less than that in the noncardiac event group (24.7 +/- 8.40 vs 33.3 +/- 7.64%, P = 0.0006), and brain natriuretic peptide was significantly larger in the cardiac event group (402 +/- 168 vs 153 +/- 51 pg/mL, P = 0.04). However, in patients with preserved systolic function, there was a significant difference in the percentage of plasma lymphocytes between the cardiac and noncardiac event groups (21.7 +/- 9.42 vs 34.2 +/- 8.21%, P = 0.037), although no difference was observed in brain natriuretic peptide (133 +/- 43 vs 125 +/- 50 pg/mL, P = 0.87). Multivariate analysis showed the percentage of plasma lymphocytes was an independent predictor of a cardiac event. The percentage of plasma lymphocytes may be useful for predicting the course of patients with congestive heart failure based on diastolic dysfunction as well as systolic dysfunction.
- Published
- 2004
31. Novel application of the hemostatic device TOMETA KUN
- Author
-
Tomohiko Sakatani, Mitsuyoshi Hadase, Tadaaki Kamitani, Hiroki Sugihara, Tatsuya Kawasaki, and Shingo Kawasaki
- Subjects
medicine.medical_specialty ,medicine.medical_treatment ,Myocardial Infarction ,Hemorrhage ,medicine.artery ,Angioplasty ,medicine ,Humans ,Myocardial infarction ,Radial artery ,Angioplasty, Balloon, Coronary ,Arterial perforation ,Intraoperative Complications ,Aged ,business.industry ,Percutaneous coronary intervention ,General Medicine ,Equipment Design ,medicine.disease ,Bandages ,Coronary Vessels ,Surgery ,medicine.anatomical_structure ,Anesthesia ,Hemostasis ,Radial Artery ,Female ,Cardiology and Cardiovascular Medicine ,Complication ,business ,Artery - Abstract
A 79-year-old woman was admitted with worsening chest discomfort and diagnosed as having an acute myocardial infarction. She underwent emergency coronary angioplasty via the transradial artery, but during surgery the proximal portion of the radial artery was perforated by a wire injury. The TOMETA KUN compression system (Zeon Medical, Tokyo, Japan) was used for hemostasis at the perforation site and enabled an anterograde flow to be maintained in the radial and ulnar arteries without extravascular leakage. In addition to stabilizing the arterial perforation, the device allowed the successful completion of the percutaneous coronary intervention procedure without the need to cease anticoagulant therapy.
- Published
- 2003
32. [Chronic pulmonary thromboembolism originating from left forearm deep vein thrombosis: a case report]
- Author
-
Hiroki, Mani, Tomohiko, Sakatani, Mitsuyoshi, Hadase, Tatsuya, Kawasaki, Tadaaki, Kamitani, Shingo, Kawasaki, and Hiroki, Sugihara
- Subjects
Venous Thrombosis ,Forearm ,Chronic Disease ,Humans ,Female ,Pulmonary Embolism ,Aged - Abstract
Upper extremity deep venous thromboembolism has become increasingly common due to the use of subclavian venous access. However, forearm deep venous thrombosis is rare. We report a case of chronic pulmonary thromboembolism originating from left forearm deep venous thrombosis. A 66-year-old woman was admitted to our hospital because of dyspnea, which had worsened over the previous 2 months. Echocardiography showed severe right ventricular enlargement and pulmonary hypertension. Perfusion lung scintigraphy revealed multisegmental perfusion defects. No likely factors responsible for hypercoagulability were found. The patient had a history of left radial fracture and had been treated with external fixation. Venography of the upper and lower extremities revealed total occlusion of the deep veins of the left forearm with collateral vessels, but no evidence of other upper or lower extremity venous thrombosis.
- Published
- 2002
33. Incidental Detection of Skeletal Uptake on Tetrofosmin Cardiac Imaging in a Patient with Multiple Myeloma
- Author
-
Tatsuya Kawasaki, Tadaaki Kamitani, Mitsuyoshi Hadase, Shingo Kawasaki, Hiroki Sugihara, Tomohiko Sakatani, and Yuri Kamitsuji
- Subjects
Male ,Heart Diseases ,Scintigraphy ,Whole-Body Counting ,Bone and Bones ,Myocardial perfusion imaging ,Coronary artery bypass surgery ,Organophosphorus Compounds ,Biopsy ,Humans ,Medicine ,Radiology, Nuclear Medicine and imaging ,Radionuclide Imaging ,Cardiac imaging ,Multiple myeloma ,Aged ,Incidental Findings ,medicine.diagnostic_test ,business.industry ,Technetium (99mTc) tetrofosmin ,Heart ,Organotechnetium Compounds ,General Medicine ,medicine.disease ,medicine.anatomical_structure ,Bone marrow ,Radiopharmaceuticals ,Multiple Myeloma ,business ,Nuclear medicine ,medicine.drug - Abstract
A 75-year-old man with a history of coronary artery bypass surgery was referred for evaluation of dyspnea and chest discomfort. He underwent myocardial perfusion imaging with 600 MBq (16.2 mCi) Tc-99m tetrofosmin at rest, followed 30 minutes later by whole-body planar imaging. Imaging revealed skeletal uptake throughout. Subsequent bone marrow biopsy revealed multiple myeloma. This finding is probably attributable to a hyperactive bone turnover rate occurring secondary to multiple myeloma.
- Published
- 2003
34. 573 Antihypertensive efficacy and safety of Losartan/hydrochlorothiazide vs. high-dose angiotensin receptor blocker (ARB) in patients with uncontrolled hypertension
- Author
-
Koji Isodono, Makoto Kitamura, Yoshinori Tsubakimoto, Toru Tanigaki, Keiji Inoue, Tomohiko Sakatani, Akiko Matsuo, Shinzo Kimura, and Hiroshi Fujita
- Subjects
Angiotensin receptor ,Physiology ,business.industry ,Anti hypertensive treatment ,Losartan/hydrochlorothiazide ,Internal Medicine ,Medicine ,In patient ,Pharmacology ,Cardiology and Cardiovascular Medicine ,business ,medicine.drug - Published
- 2012
35. Postextrasystolic Potentiation on Quantitative Gated SPECT
- Author
-
Tomohiko Sakatani, Hiroki Sugihara, Tatsuya Kawasaki, Mitsuyoshi Hadase, Shingo Kawasaki, Hiroki Mani, and Tadaaki Kamitani
- Subjects
Male ,medicine.medical_specialty ,Contraction (grammar) ,Gated SPECT ,Myocardial Ischemia ,Postextrasystolic potentiation ,Electrocardiography ,Ventricular Trigeminy ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,cardiovascular diseases ,Systole ,Aged ,Tomography, Emission-Computed, Single-Photon ,business.industry ,Technetium (99mTc) tetrofosmin ,Technetium ,Stroke Volume ,General Medicine ,Myocardial Contraction ,Circulatory system ,cardiovascular system ,Cardiology ,Radiopharmaceuticals ,Nuclear medicine ,business ,Perfusion ,medicine.drug - Abstract
A longer filling interval induces better ventricular filling and subsequently stronger contraction. This phenomenon is often observed after a premature ventricular contraction and is called postextrasystolic potentiation. The following three-dimensional perfusion images show visualization of postextrasystolic potentiation induced by ventricular trigeminy.
- Published
- 2002
36. The Association between Electrocardiographic Characteristics and Clinical Outcome in Cardiac Resynchronization Therapy
- Author
-
Shinzo Kimura, Tomohiko Sakatani, Akira Ueoka, Toru Tanigaki, Hiroshi Fujita, Takashi Shimonaga, Akiko Matsuo, Makoto Kitamura, Keiji Inoue, and Yoshinori Tsubakimoto
- Subjects
medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Internal medicine ,Cardiology ,medicine ,Cardiac resynchronization therapy ,Cardiology and Cardiovascular Medicine ,Association (psychology) ,business ,Outcome (game theory) - Published
- 2011
37. Prognostic Value of Plasma Aldosterone Levels on the Future Risk of New-Onset Atrial Fibrillation
- Author
-
Hiroshi Fujita, Keiji Inoue, Akiko Matsuo, Tomohiko Sakatani, Toru Tanigaki, Makoto Kitamura, Takashi Shimonaga, Shinzo Kimura, Yoshinori Tsubakimoto, and Akira Ueoka
- Subjects
medicine.medical_specialty ,Aldosterone ,endocrine system diseases ,business.industry ,Incidence (epidemiology) ,Hazard ratio ,Atrial fibrillation ,Brain natriuretic peptide ,medicine.disease ,chemistry.chemical_compound ,chemistry ,Internal medicine ,medicine ,Cardiology ,Outpatient clinic ,Cardiology and Cardiovascular Medicine ,Prospective cohort study ,business ,Body mass index - Abstract
Background: Renin-angiotensin-aldosterone system has been reported as one of the risk factors of atrial fibrillation (Af). However, roles of aldosterone (ALD) and predictor of new-onset Af are still unclear. We therefore evaluated predictive value of plasma ALD levels on the incidence of Af. Methods: The levels of plasma ALD were quantified in a prospective cohort study of 796 consecutive outpatient clinic patients initially free from Af (age 68.5±12.6). The subjects were divided into two groups of elevated ALD group (group H) and non-elevated ALD group (group L) according to the median value of baseline plasma ALD. The end point of the study was new-onset Af. Results: The median value of baseline ALD was 89.0 pg/mL in all patients. During a median follow-up of 941 days, incidence of new-onset Af was 7.5%. Patients of group H had a significantly higher Af incidence rates, as compared to those of group L (12.5% vs. 2.5%, P
- Published
- 2011
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