Mental functions are influenced by states of physiological arousal. Afferent neural activity from arterial baroreceptors at systole conveys the strength and timing of individual heartbeats to the brain. We presented words under limited attentional resources time-locked to different phases of the cardiac cycle, to test a hypothesis that natural baroreceptor stimulation influences detection and s...

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...

Real-time two-dimensional sector sanning was used to analyse mitral valve motion in 4 normal subjects and 6 patients with previously diagnosed mitral valve prolapse syndromes. The normal mitral valve leaflets remain apposed for the duration of systole, and open abruptly with the onset of diastole. During diastole the leaflets are parallel to each other and only the distal ends tend to 'float' c...

A young man with IHSS who developed complete heart block was successfully treated with a permanent pacemaker. Echocardiography and other noninvasive techniques showed marked cycle-to-cycle variation in the evidence of subvalvular obstruction which decreased markedly when atrial systole preceded the ensuing paced complex by an appropriate interval. Because cycle length and therefore afterload we...

This study was conducted to explore the geometrical changes of the mitral annulus during systole. The 3D shape of the mitral annulus was reconstructed in 13 normal subjects who had normal structure of the mitral apparatus using real-time 3D echocardiography (RT3DE) and 3D computer software. The two orthogonal (antero-posterior and commissure-commissure) dimensions, the areas (2D projected and 3...

Free-breathing cardiac magnetic resonance (CMR) imaging has short examination time with high reproducibility. Detection of the end-diastole and the end-systole frames of the free-breathing cardiac magnetic resonance, supplemented by visual identification, is time consuming and laborious. We propose a novel method for automatic identification of both the end-diastole and the end-systole frames, ...