EDV? End diastolic volume.. confusion?!

[StrongBeliever]

So, EDV is basically the volume of blood loading the ventricle before its contraction but my question is, inorder to visualise this.

Is EDV bascially after when the atria pumps its blood to the ventricle while it's relaxed.. as in before it ejects the blood to the big arteries(ESV) or am I wrong

?

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[KVBane]

Atrial contractions actually contribute a surprisingly small percentage of blood into the ventricles, the majority of blood in the ventricles come from passive ventricular filling.

Dont overthink things, end diastolic volume is simply the amount of blood present in the ventricles the instant before contraction (systole) begins.

 

[nwciowa]

EDV is the volume of blood in the ventricles (usually L ventricle) immediately prior to semilunar (aortic/pulmonic) valve opening. It does include the volume pumped by the atria. ESV is the volume of blood immediately after these valves close, when the aorta and pulmonary artery pressures overcome that of the ventricles. If there is any ejection fraction at all, EDV > ESV. The greater the difference, the more efficient the heart's ventricular function. Think of these volumes in terms of the valve dynamics. Hope that helps!