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Your search keyword '"Ayumi Iwamuro"' showing total 2 results
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2 results on '"Ayumi Iwamuro"'

1. Ventricular Fibrillation Induced by Takotsubo Syndrome with Congenital Long QT Syndrome

Author

Masayasu Izuhara, Mamoru Taguchi, Takashi Uegaito, Keisuke Shioji, Tomoki Sasa, Mitsuo Matsuda, and Ayumi Iwamuro

Subjects
medicine.medical_specialty, Case Report, 030204 cardiovascular system & hematology, QT interval, Hyperkinesis, 03 medical and health sciences, Electrocardiography, 0302 clinical medicine, Heart Rate, Takotsubo Cardiomyopathy, Internal medicine, T wave, Internal Medicine, medicine, Humans, cardiovascular diseases, Takotsubo syndrome, business.industry, congenital long QT syndrome, General Medicine, Middle Aged, medicine.disease, Stenosis, Long QT Syndrome, medicine.anatomical_structure, Ventricle, Echocardiography, Ventricular fibrillation, Ventricular Fibrillation, Cardiology, cardiovascular system, 030211 gastroenterology & hepatology, Female, business, Artery
Abstract

We herein report a case of congenital long QT syndrome (LQTS) in which the QT interval was prolonged by Takotsubo syndrome (TTS), inducing ventricular fibrillation (VF). The patient was a 55-year-old woman who had been diagnosed with LQTS. Cardiopulmonary arrest occurred while coughing during sleep. VF was observed, and her heartbeat returned after two defibrillations. An electrocardiogram showed marked QT prolongation and large negative T waves. Echocardiography demonstrated hyperkinesis at the base of the left ventricle and akinesis at the apex. As there was no significant stenosis in the coronary artery, she was diagnosed with TTS.

Published
2019

2. Aortic valve replacement with a 17-mm mechanical prosthesis in octogenarian or older patients

Author

Takashi Uegaito, Ayumi Iwamuro, Keisuke Shioji, Mitsuo Matsuda, Tatsuya Ogawa, Masahiko Onoe, and Souji Moriwaki

Subjects
Male, Pulmonary and Respiratory Medicine, medicine.medical_specialty, Peak pressure, medicine.medical_treatment, Hemodynamics, 030204 cardiovascular system & hematology, Prosthesis Design, Prosthesis, New york heart association, Transcatheter Aortic Valve Replacement, 03 medical and health sciences, 0302 clinical medicine, Older patients, Quality of life, Aortic valve replacement, Internal medicine, medicine, Humans, Retrospective Studies, Aged, 80 and over, Body surface area, business.industry, Aortic Valve Stenosis, medicine.disease, Surgery, Treatment Outcome, 030228 respiratory system, Echocardiography, Aortic Valve, Heart Valve Prosthesis, Cardiology, Female, Cardiology and Cardiovascular Medicine, business, Follow-Up Studies
Abstract

Objective Few studies have reported on aortic valve replacement (AVR) in patients aged >80 years who have small aortic annuli. Various surgical techniques have been proposed for treating such patients. We investigated AVR using small-diameter mechanical valves, in patients aged >80 years, to determine its effectiveness. Methods Eighteen consecutive patients (15 women; 3 men) aged >80 (mean: 83.3 ± 2.7) years underwent surgical AVR with a 17-mm prosthesis. The clinical status and results of pre- and post-operative echocardiography were evaluated. Midterm examination was conducted at 12.0 ± 1.0 months after AVR. Results The average preoperative body surface area of the patients was 1.39 ± 0.15 m 2 ; the average New York Heart Association functional class was 3.28 ± 0.75. Echocardiography showed a peak pressure gradient of 99.1 ± 38.4 mm Hg. Operative mortality was absent. A significant decrease in the peak pressure gradient was found on early (22.6 ± 7.2 mm Hg) and midterm (22.2 ± 8.0 mm Hg) postoperative echocardiography, compared with that in the preoperative period. During this follow-up, 16 patients improved to class I, a significant change in each perioperative period compared with the preoperative period. No mortality was observed at 1 year postoperatively. Conclusions In patients aged >80 years who have small aortic annuli, AVR using a 17-mm prosthesis showed satisfactory clinical and hemodynamic results and provided a satisfactory remote prognosis.

Published
2016
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