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 ?
Specific segments of the cardiac cycle may be analyzed.
Cardiac cycle parameters, such as Heart Rate, End Systolic Pressure, End Diastolic Pressure, Max Pressure, Min Pressure, Max dP/dt, Min dP/dt, Max Volume, Min Volume, End Systolic Volume, End Diastolic Volume, Stroke Volume, Cardiac Output, Ejection Fraction, and Stroke Work can be monitored online.
The Importance of Cardiac Myosin Light National Institutes of Health Chains in the Cardiac Cycle and Their Role in the Discovery of Adult Cardiac Stem Cells -- James H.
The techniques take advantage of 3-D spatial encoding and flow-sensitive MRI capabilities to provide anatomical and three-directional velocity information over the entire cardiac cycle for each pixel within a 3-D volume.
Unlike with pacemaker signals, which are delivered during a period of the cardiac cycle when a new beat can be initiated, the CCM signals are "non-excitatory," meaning they are delivered during the absolute refractory period and therefore cannot initiate a new contraction.
Combining faster scan times with better resolution allows visualization of coronary activity within one cardiac cycle for evaluation of coronary-artery problems, wall-motion abnormalities and heart-tissue viability," said Blodgett.
Compression of the right atrium and ventricle by a large circumferential pericardial effusion was noted, with collapse in < 50% of the cardiac cycle.
Heart valves are thin flaps of tissue in the mammalian heart, which ensure unidirectional flow of blood between the four chambers during the cardiac cycle.
Whenever a pericardial effusion is detected at CMR, assessment for signs of tamponade should occur which include early diastolic flattening of the right ventricular free wall, late diastolic and early systolic right atrial notching present during greater than one third of the cardiac cycle, and dilatation of the superior and inferior vena cava (Figure 2).
Patients with high heart rates or arrhythmia can be challenging to diagnose with confidence because high heart rates can introduce motion artefacts, making it difficult to find an appropriate phase of the cardiac cycle suitable for the analysis of all coronary segments.
Research: Pulmonary first pass filtration of particles marginally exceeding ~7 [micro]m (the size of a red blood cell) is used routinely in diagnostics, and allows cellular aggregates forming or entering the circulation in the preceding cardiac cycle to lodge safely in pulmonary capillaries/arterioles.
She describes basic cardiac anatomy, cardiac electrical conduction, the cardiac cycle and the rhythm strip, and the steps for reading an EKG, then how to recognize common cardiac rhythms, their possible causes, and examples, with practice strips and scenarios.