cardiac cycle


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Related to cardiac cycle: cardiac output, blood pressure, Heart sounds
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Noun1.cardiac cycle - the complete cycle of events in the heart from the beginning of one heart beat to the beginning of the next; an electrical impulse conducted through the heart muscle that constricts the atria which is followed by constriction of the ventricles; "the cardiac cycle can be shown on an electrocardiogram"
oscillation, cycle - a single complete execution of a periodically repeated phenomenon; "a year constitutes a cycle of the seasons"
References in periodicals archive ?
Unlike FFR, which requires administration of the drug adenosine to maximally vasodilate the heart muscle and then measure the differences in a pressure along a blocked or narrowed artery, iFR relies on measuring the pressure during a specific point in the cardiac cycle.
The ECG trace is used to synchronize the cardiac cycle with cine image acquisition.
Engineered to restore natural valve performance, the Perceval valve features a super-elastic stent, which is able to adapt to the movement of the aorta during the cardiac cycle.
The characteristic findings were reductions in the P wave intensity, increase in QRS amplitude, QT interval and prolongation of cardiac cycle along with ST segment elevation.
Method: A total of 20 patients underwent technetium-99m-MIBI SPECT myocardial perfusion imaging using 16-frame per cardiac cycle acquisition.
The study will use the Inca PV system, which allows visualization of the complete cardiac cycle in real-time, to monitor ESPVR, EDPVR, Tau and cardiac output.
He then discussed in detail cardiac cycle and ECG, coronary artery system, approach to read ECG, pattern of reading ECG so that one does not miss anything.
Heart rate variability (HRV) is the beat to beat variation in the cardiac cycle which occurs due to the periodic alterations in the parasympathetic and sympathetic inputs to the heart.
This assumption is based upon the fact that at rest the proportion between systolic and diastolic periods of the cardiac cycle is approximately 1/3 and 2/3 for the systole and the diastole respectively.
HRV, 24 hour RR intermediate stage standard deviation (SDNN), five minutes average normal cardiac cycle standard deviation in 24 hour (SDANN), 24 hour close together normal cardiac cycle difference value mean square root (rMSSD), the percentage of difference of close together RR intermediate > 50 ms account total RR intermediate (PNN50), high frequency (HF) and low frequency (LF) parameters of patients were observed before and after treatment.
The velocities recorded upstream of the lesion are displayed for one cardiac cycle in Figures 2 and 3.