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A 38-year-old member asked:

How do beta-blockers increase cardiac output?

2 doctor answers11 doctors weighed in
Dr. Francis Uricchio
Cardiology 39 years experience
They don't: Cardiac output is the product of heart rate and stroke volume. Beta blockers decrease heart rate and the strength of contraction (contractility). Thus, beta blockers would not be expected to increase cardiac output.
Dr. Mazin Albert
Dr. Mazin Albertanswered
General Practice 11 years experience
It does not: Beta-blockers do not increase, but rather decrease cardiac output. Their mechanism of action involves blocking the effects of Epinephrine and norepinephrine on beta-receptors within the heart and peripheral vasculature. By blocking these two hormones, a beta-blocker inhibits their effects including increased heart rate and contractility, the two factors that compose cardiac output.

Similar questions

A 38-year-old member asked:

How do beta-clockers increase cardiac output?

2 doctor answers5 doctors weighed in
Dr. Francis Uricchio
Cardiology 39 years experience
They don't: Beta blockers do not increase cardiac output. If anything, they reduce cardiac output by reducing heart rate and the strength of contraction (contractility).
India
A 23-year-old member asked:

What could increase cardiac output?

2 doctor answers7 doctors weighed in
Dr. Bart Denys
Cardiology 40 years experience
Cardiac output: Basically an increase in demand for oxygen by the body. This may be physiological (exercise) or pathological (sepsis - infection - fever) or increased metabolism (hyper active thyroid gland - hyperthyroidism) or abnormal conducts (shunting of blood).

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Last updated Oct 7, 2016
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