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Objectives: We investigated the effect of nasal continuous positive airway pressure (CPAP) on blood pressure (BP) and left ventricular structure in male patients with severe obstructive sleep apnea (OSA). Study design: Thirty-three male patients with severe OSA underwent CPAP treatment for six months. Compliance was defined as the use of CPAP for at least 3.5 hours per night during treatment; thus, 25 patients (mean age 47.9±8.2 years) were compliant with a mean of 5.3±1.9 hours, and eight patients (mean age 48.6±8.4 years) were noncompliant with a mean of 1.0±0.8 hours. Before and after CPAP, echocardiographic assessments were made to determine left ventricular structure (interventricular septum thickness, left ventricular posterior wall thickness, left ventricular mass, and left ventricular mass index) and function (E/A ratio, isovolumic relaxation time, mitral deceleration time, and velocity of mitral flow propagation), and systolic and diastolic blood pressures were measured. In the compliant group, 20 patients had hypertension, 22 patients had diastolic dysfunction, and 16 patients had left ventricular hypertrophy (LVH). All noncompliant patients were hypertensive, four had diastolic dysfunction, and four had LVH. Results: Systolic and diastolic BPs significantly decreased after CPAP treatment, the decreases being more pronounced in the compliant group (p

Objectives: We investigated the effect of nasal continuous positive airway pressure (CPAP) on blood pressure (BP) and left ventricular structure in male patients with severe obstructive sleep apnea (OSA). Study design: Thirty-three male patients with severe OSA underwent CPAP treatment for six months. Compliance was defined as the use of CPAP for at least 3.5 hours per night during treatment; thus, 25 patients (mean age 47.9±8.2 years) were compliant with a mean of 5.3±1.9 hours, and eight patients (mean age 48.6±8.4 years) were noncompliant with a mean of 1.0±0.8 hours. Before and after CPAP, echocardiographic assessments were made to determine left ventricular structure (interventricular septum thickness, left ventricular posterior wall thickness, left ventricular mass, and left ventricular mass index) and function (E/A ratio, isovolumic relaxation time, mitral deceleration time, and velocity of mitral flow propagation), and systolic and diastolic blood pressures were measured. In the compliant group, 20 patients had hypertension, 22 patients had diastolic dysfunction, and 16 patients had left ventricular hypertrophy (LVH). All noncompliant patients were hypertensive, four had diastolic dysfunction, and four had LVH. Results: Systolic and diastolic BPs significantly decreased after CPAP treatment, the decreases being more pronounced in the compliant group (p

Background and Objective: Obstructive sleep apnea (OSA) has a critical association with cardiovascular mortality and morbidity. Carotid intima-media thickness (IMT), flow-mediated dilatation (FMD) and aortic stiffness are early signs of atherosclerosis. The presence of subclinical atherosclerosis was assessed in OSA patients using these parameters. Methods: 40 patients with OSA showing an apnea-hypopnea index (AHI) ?5 (mean age 51.3 ± 9 years, 32 males) and 24 controls (AHI < 5, mean age 51.9 ± 5.2 years, 19 males) were enrolled in the study. In all subjects, polysomnographic examination and recordings were performed during sleep. IMT of the carotid artery, endothelium-dependent/-independent vasodilation of the brachial artery and aortic elastic parameters were investigated using high-resolution Doppler echocardiography. Results: The demographic data of the patients with OSA and controls were not significantly different. Subjects with OSA demonstrated higher values of aortic stiffness (7.1 ± 1.88 vs. 6.42 ± 1.56, respectively) and IMT (0.85 ± 0.13 vs. 0.63 ± 0.11 mm, p = 0.0001, respectively) but lower distensibility (9.47 ± 1.33 vs. 11.8 ± 3.36 cm2/dyn/106) and FMD (4.57 ± 1.3 vs. 6.34 ± 0.83%, p = 0.0001, respectively) than the controls. The respiratory disturbance index correlated positively with aortic stiffness and IMT and negatively with distensibility and FMD. Conclusion: We observed blunted endothelium-dependent dilatation, increased carotid IMT and aortic stiffness in patients with OSA compared with matched control subjects. This is evident in the absence of other diseases, suggesting that OSA is an independent cause of atherosclerosis. These simple and non-invasive methods help to detect subclinical atherosclerosis in OSA. Copyright © 2006 S. Karger AG.

Background and Objective: Obstructive sleep apnea (OSA) has a critical association with cardiovascular mortality and morbidity. Carotid intima-media thickness (IMT), flow-mediated dilatation (FMD) and aortic stiffness are early signs of atherosclerosis. The presence of subclinical atherosclerosis was assessed in OSA patients using these parameters. Methods: 40 patients with OSA showing an apnea-hypopnea index (AHI) ≥5 (mean age 51.3 ± 9 years, 32 males) and 24 controls (AHI < 5, mean age 51.9 ± 5.2 years, 19 males) were enrolled in the study. In all subjects, polysomnographic examination and recordings were performed during sleep. IMT of the carotid artery, endothelium-dependent/-independent vasodilation of the brachial artery and aortic elastic parameters were investigated using high-resolution Doppler echocardiography. Results: The demographic data of the patients with OSA and controls were not significantly different. Subjects with OSA demonstrated higher values of aortic stiffness (7.1 ± 1.88 vs. 6.42 ± 1.56, respectively) and IMT (0.85 ± 0.13 vs. 0.63 ± 0.11 mm, p = 0.0001, respectively) but lower distensibility (9.47 ± 1.33 vs. 11.8 ± 3.36 cm2/dyn/106) and FMD (4.57 ± 1.3 vs. 6.34 ± 0.83%, p = 0.0001, respectively) than the controls. The respiratory disturbance index correlated positively with aortic stiffness and IMT and negatively with distensibility and FMD. Conclusion: We observed blunted endothelium-dependent dilatation, increased carotid IMT and aortic stiffness in patients with OSA compared with matched control subjects. This is evident in the absence of other diseases, suggesting that OSA is an independent cause of atherosclerosis. These simple and non-invasive methods help to detect subclinical atherosclerosis in OSA. Copyright © 2006 S. Karger AG.

Amaç: Metabolik sendrom (MS), kardiyovasküler hastalık riskini artırdığı kabul edilen bir durumdur. Bu çalışmanın amacı, NCEP (ATP III) kriterlerine göre MS tanısı konmuş hastalarda, sol ventrikül fonksiyonlarını atriyoventriküler plan yer değişimi (AVPD), miyokardiyal performans indeksi (MPİ) ve konvansiyonel metodlarla değerlendirmektir. Yöntemler: Metabolik sendromlu 53 kadın hasta (ortalama yaş 53.5±6.9 yıl) ve 30 sağlıklı kadın (ortalama yaş 52.7±6.3 yıl, p>0.05) tam ekokardiyografik değerlendirmeye alındı. Olguların hiçbirinde kalp ve akciğer hastalığı yoktu. Sistolik mitral AVPD 4 bölgeden (septal, lateral, anteriyor ve posteriyor) M-mod ekokardiyografi ile ölçüldü ve ortalama AVPD’den sol ventrikül ejeksiyon fraksiyonu (EF) hesaplandı (EF-AVPD). Sol ventrikül EF, ayrıca biplan Simpson (EF-2D) ve Teichholz (EF-T) metodlarıyla da değerlendirildi. Miyokardiyal performans indeksi, Doppler ekokardiyografi ile (isovolümik kontraksiyon zamanı + isovolümik relaksasyon zamanı) / aortik ejeksiyon zamanı) formülünden hesaplandı. Bulgular: Metabolik sendromlu kadınlar, sağlıklı kişilerle kıyaslandığında hafif sol ventrikül diyastolik disfonksiyonu (DD) gösterdiler. Hasta ve kontrol gruplarında EF-2D ve EF-T anlamlı fark oluşturmadı ve normal sınırlardaydı. Metabolik sendromlu hastalar sağlıklı kişilere göre sol ventrikül global disfonksiyonu gösterdiler (MPİ sırasıyla 0.56±0.12 ve 0.46±0.11, p