11 doctors weighed in:

Why does a higher stroke volume reduce angina ?

11 doctors weighed in
Dr. Mark Milunski
Internal Medicine - Cardiology
8 doctors agree

In brief: Stroke volume

Stroke volume is the amount of blood ejected from the heart with each beat.
A higher stroke volume implies increased cardiac contractility which means more oxygen demands by the heart muscle. In the presence of significant coronary artery disease, this increased contractility will increase, not reduce, angina.

In brief: Stroke volume

Stroke volume is the amount of blood ejected from the heart with each beat.
A higher stroke volume implies increased cardiac contractility which means more oxygen demands by the heart muscle. In the presence of significant coronary artery disease, this increased contractility will increase, not reduce, angina.
Dr. Mark Milunski
Dr. Mark Milunski
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Dr. Daniel Zanger
Internal Medicine - Cardiology
1 doctor agrees

In brief: Stroke volume

It doesn't higher stroke volume means the heart is working harder likely to provoke angina.

In brief: Stroke volume

It doesn't higher stroke volume means the heart is working harder likely to provoke angina.
Dr. Daniel Zanger
Dr. Daniel Zanger
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Dr. Gary Kilgo
Neurology
1 doctor agrees

In brief: Angina

Higher stroke volume helps decrease angina by decreasing the oxygen demand on the heart and improving the oxygen supply and demand ratio.

In brief: Angina

Higher stroke volume helps decrease angina by decreasing the oxygen demand on the heart and improving the oxygen supply and demand ratio.
Dr. Gary Kilgo
Dr. Gary Kilgo
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1 comment
Dr. Mark Milunski
You are confusing coronary blood flow (CBF)with stroke volume. In the presence of significant CAD, increased stroke volume means increased myocardial contractility/wall stress which means increased oxygen demands by the myocardium. Myocardial oxygen extraction is about 75% which at physiologic conditions is all the oxygen that hemoglobin can release. Therefore, myocardial oxygen supply is limited only by CBF which is restricted in significant CAD.
Dr. Satyabrata Chatterjee
Internal Medicine

In brief: CO is increased

Cardiac output is increased and hence the "supply" side of the supply-demand equation is increased.

In brief: CO is increased

Cardiac output is increased and hence the "supply" side of the supply-demand equation is increased.
Dr. Satyabrata Chatterjee
Dr. Satyabrata Chatterjee
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