Talk:Frank-Starling law of the heart

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I'm not so sure that Stroke Volume can be equal to End Diastolic Volume since there is residual volume. Stroke Volume would be equal to (End Diastolic Volume - Residual Volume). With heart disease the residual volume increases, but I don't believe that a healthy heart can eliminate it all together. EBRozen 08:50, 30 January 2006 (UTC)

Right. End-diastolic volume is around 120ml, while end-systolic volume is around 50ml (for all of us 70-kg men :-), putting stroke volume at 70ml. Those are resting values, but even during exercise ESV isn't going to drop to zero. The heart's like a sponge in that no matter what the force of contraction, it's not going to be able to eject 100% of EDV. A more appropriate indicator of a healthy heart is ejection fraction, which should be above 0.5 in healthy individuals. But I don't know if that fact belongs in this article. --David Iberri (talk) 00:49, 15 February 2006 (UTC)

[edit]  :-b

thank you for your idea , it's clear when i look for the relation between EDV and SV of the The heart. The equation SV = EDV - ESV is described why the curve doesn't initiate at the ( 0,0 )

How interesting in discussing of this subject.

i'll prepare my knowledge and see you , targeting for exchange about this topic