Cardiac event at the end of isometric relaxation phase:
Correct Answer: Atrioventricular valves open
Description: Isometric relaxation - Semilunar valves have closed. - AV valves yet to open In isometric relaxation ventricular muscle continues to relax without change in ventricular volume | Intraventricular pressure decreases back to the diastolic levels | AV valves open JVP correlation to cardiac cycle A wave: Atrial contraction C wave: Beginning of ventricular contraction bulging of AV valves back towards atria V wave: Towards end of ventricular contraction X wave: Ventricular contraction Y wave: Atrial emptying tricuspid valve opens
Category:
Physiology
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