isovolumetric relaxation
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isovolumetric relaxation phase — isovolumic relaxation phase period of isovolumic relaxation … Medical dictionary
relaxation — 1. Loosening, lengthening, or lessening of tension in a muscle. 2. In nuclear magnetic resonance, r. is the decay in magnetization of protons after the direction of the surrounding magnetic field is changed; the different rates of r. for… … Medical dictionary
isovolumetric period — isovolumic period in the cardiac cycle, an interval during which the cardiac muscle fibers are contracting or relaxing but the valves are all closed, so that ventricular pressure changes rapidly while volume remains constant; see p. of isovolumic … Medical dictionary
pressure-volume loops — graphic representations of the pressure within cardiac ventricles as a function of their volumes, recorded over the course of the cardiac cycle under various conditions, such as increased preload or afterload, and used to assess cardiac… … Medical dictionary
Jugular venous pressure — A man with congestive heart failure and marked jugular venous distension. External jugular vein marked by an arrow. The jugular venous pressure (JVP, sometimes referred to as jugular venous pulse) is the indirectly observed pressure over the… … Wikipedia
Wiggers diagram — A Wiggers diagram is a standard diagram used in cardiac physiology. The X axis is used to plot time, while the Y axis contains all of the following on a single grid:* Blood pressure ** Aortic pressure ** Ventricular pressure ** Atrial pressure *… … Wikipedia
