Nobuhiko Haruki

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AIMS The aim of this study was to determine differences in the acute and chronic impact of adaptive servo-ventilation (ASV) on left chamber geometry and function in patients with chronic heart failure (CHF). METHODS AND RESULTS An acute ASV study was performed to measure echocardiographic parameters before and 30 min after the initiation of ASV therapy in(More)
BACKGROUND Aging and westernization of lifestyle has accelerated the prevalence and severity of atherosclerotic cardiovascular diseases in the Japanese population. The aim of this study was to examine the prevalence of complex plaque formation in the descending thoracic aorta (DTA) as assessed by real-time 3-dimensional transesophageal echocardiography(More)
BACKGROUND Although left atrial volume (LAV) by two-dimensional (2D) echocardiography provides prognostic information, the misalignment of the 2D cutting plane of the left atrium could make the measurements inaccurate. The aim of this study was to test the hypothesis that LAV measurement from three-dimensional (3D) echocardiographic data sets using the(More)
BACKGROUND Mitral inflow patterns reflect not only left ventricular diastolic function but also left atrial (LA) remodeling. The aim of this study was to determine the effects of left ventricular diastolic dysfunction on LA volumetric and functional parameters assessed using two-dimensional speckle-tracking echocardiography. METHODS Two-dimensional(More)
BACKGROUND Precise evaluation of the aortic root geometry prior to transcatheter aortic valve implantation is important for procedural success in patients with aortic stenosis (AS). To determine the potential for 3-dimensional transesophageal echocardiography (3DTEE), the aims of the present study were: (1) to assess the accuracy of 3DTEE measurements of(More)
BACKGROUND Aging and gender may affect left ventricular (LV) mechanics. The aim of this study was to determine the age and gender dependency of LV mechanical indices obtained from real-time three-dimensional echocardiography (RT3DE). METHODS RT3DE was performed in 280 healthy subjects (age range, 1-88 years; 137 men). From full-volume data sets, LV(More)
OBJECTIVES The hypothesis of this study was that minimal left atrial volume index (LAVImin) by 3-dimensional echocardiography (3DE) is the best predictor of future cardiovascular events. BACKGROUND Although maximal left atrial volume index (LAVImax) by 2-dimensional echocardiography (2DE) is a robust index for predicting prognosis, the prognostic value of(More)
AIMS We hypothesized that continuous positive airway pressure (CPAP) therapy could improve sleep-induced left ventricular (LV) dysfunction in patients with obstructive sleep apnoea syndrome (OSA). The aim of this study was to investigate the effects of CPAP therapy on LV systolic dysfunction during overnight sleep in patients with OSA using two-dimensional(More)
BACKGROUND The aim of this study was to investigate the effect of out-of-plane motion on discrepancies in strain measurements between two-dimensional (2D) and three-dimensional (3D) echocardiography. METHODS Two-dimensional and 3D data sets were acquired in 54 patients. Using 2D and 3D speckle-tracking software, global circumferential strain (CS) and(More)
AIMS Although left ventricular (LV) diastolic dysfunction is frequently observed in patients with obstructive sleep apnoea (OSA), the effects of overnight sleeping on LV function remain unclear. The aim of this study was to determine acute effects of overnight sleeping on LV function in OSA patients. METHODS AND RESULTS In 29 OSA patients with normal LVEF(More)