نتایج جستجو برای: diastole
تعداد نتایج: 4129 فیلتر نتایج به سال:
Precise estimation of fiducial points a seismocardiogram (SCG) signal is challenging problem for its clinical usage. Delineation techniques proposed in the existing literature do not estimate all clinically significant an SCG simultaneously. The aim this research work to propose delineation framework identify various systole and diastole with help photoplethysmogram (PPG) signal. method process...
Background Increased left atrial (LA) size measured at left ventricular (LV) end systole is associated with cardiovascular morbidity and mortality in population based studies. LA function can be divided into 3 components: LA filling during LV systole, a passive emptying phase during early diastole and active atrial systole during LV late diastole. We sought to assess the relationships of LA vol...
Reliable demonstration of the coronary arteries in the living is possible if special techniques are used. A historical summary and review of various methods will be found in publications by Dotter and Frische (1958) and Michell (1960). In a previous communication from this department (Sloman and Jefferson, 1960) a technique of coronary arteriography in living dogs was described using acetyl-cho...
Background Vortex formation in the left ventricle (LV) is suggested to contribute to efficient blood pumping and minimization of energy loss. Patients after atrioventricular septal defect (AVSD) repair may present abnormalities in valve morphology and subsequently develop altered LV inflow patterns [1], in which normal vortex formation may be disturbed. This may lead to energy loss. We aimed to...
This report describes the echocardiographic features seen in a case of bacterial endocarditis in which the aortic valve leaflets had been partially destroyed. The echocardiogram demonstrated unusual, disorganized echo patterns in the outflow tract of the left ventricle near the anterior leaflet of the mitral valve in diastole. These were shown to be continuous with similar disorganized echo pat...
AIMS To evaluate the effect of considerably high left ventricular filling pressure with mitral regurgitation on mitral annular velocity during early diastole. SUBJECTS Two hundred and forty-three patients who underwent cardiac catheterization for evaluation of chest pain. METHODS Mitral annular velocity during early diastole was measured by colour M-mode tissue Doppler imaging. Patients wer...
BACKGROUND Cardiac diffusion tensor imaging (cDTI) measures the magnitudes and directions of intramyocardial water diffusion. Assuming the cross-myocyte components to be constrained by the laminar microstructures of myocardium, we hypothesized that cDTI at two cardiac phases might identify any abnormalities of laminar orientation and mobility in hypertrophic cardiomyopathy (HCM). METHODS We p...
The purpose of this study was to verify the timing of triggering in relation to the cardiac cycle in shooting. The test subjects were six Finnish rifle and pistol champions as well as three beginners at shooting. The electrical activity of the trigger finger muscle (m. flexor digitorum superficialis; surface electrodes) and the heart cycle were fed into a two-channel x-t recorder. The movements...
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