Systole

Alternate Names
: Extrasystole, Premature Beats, Premature Contraction, PVB (Premature Ventricular Beat), PVC (Premature Ventricular Contraction)
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During systole, your ventricles contract, forcing blood into the vessels going to your lungs and body - much like ketchup being forced out of a squeeze bottle. The right ventricle contracts a little bit before the left ventricle does.
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alternation of heart; electrical axis; electrical conductivity; electrical coupling; electrical diastole; electrical failure; electrical formula; electrical heart position; electrically; electricalness; electrical synapse; electrical systole; ...
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the coordination of systole and musical central time point (1st beat of the 6/8 time alla breve).
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For example, a presystolic murmur is heard just BEFORE systole and is usually caused by narrowing of the mitral or tricuspid valve (the valves between the atria and the ventricles).
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This program enables the viewer to determine the period of systole and diastole, and to identify the sounds in the proper portion of the cardiac cycle. Instructions for use of this program appear below.
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If your heart rate is very fast (over 100 beats per minute), this is called tachycardia. An unusually slow heart rate is called bradycardia, and an occasional extra heart beat is known as extrasystole.
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Atrial ectopic beats (AEB) refers to a contraction of the upper heart chamber which occurs before it would be expected. Atrial ectopic beats are also known as premature atrial beats, premature atrial complex (PAC), or atrial extrasystole.
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