Atrial systole contributes most of a ventricle's EDV.

Name: Atrial systole contributes most of a ventricle's EDV.
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Quizplus · Accepted Answer

Ventricular filling during diastole, specifically passive filling during early diastole, contributes the most to a ventricle's end diastolic volume (EDV). Atrial systole occurs during late diastole and contributes to approximately 20% of ventricular filling, but this is not the primary contributor to EDV.

Atrial Systole Contributes Most of a Ventricle's EDV