Question

A stroke volume ejected on the next heartbeat after a premature beat is usually larger than normal. Explain why this occurs. (Hint: At a given heart rate, the interval between a premature beat and the next normal beat is longer than the interval between two normal beats.

Answer 1

Answer: During this longer duration the ventricle is actually getting blood pumped into it.

Explanation:This premature beat is usually called PREMATURE VENTRICULAR CONTRACTION(PVC). this heart is actually an extra beat which usually starts from one of the ventricles it disorganises the normal heart beat pattern leading to fluttering(A fast beat). This is usually caused by certain health conditions,high alcohol, caffeine intake or a damage to any part of the heart especially the ventricles and also ectopic cardiac pacemaker located within the ventricles.