A 30-year-old member asked:
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how could hypertension affect cardiac output?

2 doctor answers
Dr. Louis Grenzer
54 years experience Cardiology
Two ways: It can cause the heart muscle to get thick and stiff so that it does not relax and fill up with blood properly. It could also cause the heart muscle to become weak so that it does not squeeze or contract as forcefully. These are called diastolic dysfunction (too thick) or systolic dysfunction (weak and flabby).
Answered on Jun 18, 2019
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Dr. Tracy Lawrence
21 years experience Cardiology
Increases workload: Hypertension causes the central aortic blood pressure to increase. Going back to physics: flow (cardiac output) = pressure gradient (pressure the heart generates-blood pressure) / resistance of the vessels. So if the blood pressure is higher the pressure gradient is lower. Also the resistance may be higher.
Answered on Mar 27, 2013

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A 38-year-old member asked:
Dr. Samuel Hahn
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It doesn't: In a physiologic model, increased blood pressure or "hypertension" or increased "afterload" tends to decrease cardiac output. In a complete animal or ... Read More
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A 31-year-old member asked:
Dr. Mark Stern
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No: No, in fact a very weak heart can cause low blood pressure , or normal or high blood pressure.
A 40-year-old member asked:
Dr. Robert Vogt Lowell
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Depends: In theory, the harder it is for blood to leave the heart (as when BP is very elevated) the less of it will be pumped out per beat or per minute (decre ... Read More
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Dr. Gurmukh Singh
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Cardiac damage: Hypertension, if not treated, leads to myocardial hypertrophy, accelerated atherosclerosis resulting in inadequate blood supply to heart muscle that l ... Read More
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