A spontaneously beating frog heart was automatically frozen at certain intervals after the R wave of the electrocardiogram. The determination of the SH groups in the ventricular myocardium was carried out during four periods of the cardiac cycle: at the onset of the muscular contraction; at the ...
corresponding electrocardiogram signals (lower left). A zoomed-in plot shows the different phases of a representative cardiac cycle (right). Primary events include diastole and opening of the mitral valve during the P-wave of the electrocardiogram, opening of the aortic valve and systole during the...
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Reference equations for pulse wave velocity, augmentation index, amplitude of forward and backward wave in a European general adult population ArticleOpen access05 October 2024 Measurement of pressure dependent variations in local pulse wave velocity within a cardiac cycle from forward travelling pulse wa...
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The cardiac cycle consists of one complete contraction (systole) and one complete relaxation (diastole), or one complete heartbeat. Atrial systole is... Learn more about this topic: Cardiac Cycle | Definition, Phases & Diagram from Chapter 13/ Lesson 8 ...
To remove motion artefacts, a device was built to convert “noisy” umbilical arterial Doppler waveforms (UADWs) from an ultrasound (US) system into sharp ECG R-wave-like cardiac cycle triggering signals (CCTSs). These CCTSs were then used to gate a simultaneous (online) 3-D acquisition of...
Another analysis method finds the time shift at which both curves have the highest correlation; however, this can be affected by the correlation window and presence of wave reflections starting from the systolic downslope [150]. Instead of relying on phase-contrast acquisitions in two slices, PWV...
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