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A 36-year-old member asked:

What factors can affect cardiac output?

4 doctor answers8 doctors weighed in
Dr. Mark Milunski
Cardiology 37 years experience
Cardiac output: In strict physiologic terms, cardiac output is determined by something called stroke volume and heart rate. Heart rate is self-explanatory. Stroke volume is the amount of blood that the heart pumps out with each beat. This in turn is dependent on blood pressure, total blood volume, and how strong the heart contracts.
Dr. Sahba Ferdowsi
General Practice 18 years experience
Great answer!
Jan 29, 2012
Dr. Brian Strizik
Cardiology 28 years experience
So many things: Drugs, volume of fluid in your body, infection, other illnesses, etc. The list is extremely long.
Dr. Francis Uricchio
Cardiology 38 years experience
Numerous: Cardiac output is determined by the product of heart rate and a stroke volume (the amount of blood ejected with each heartbeat). Stroke volume is affected by something called contractility which is the strength of the heart muscle contraction. Contractility can be improved with sympathetic tone (epinephrine) or medications (dobutamine and others).
Dr. Calvin Weisberger
Cardiology 51 years experience
Cardiac output: Stroke volume times heart rate equals cardiac output. Stroke volume relates to myocardial contractility, vascular resistance, vascular volume, anemia and metabolic state. There are subcomponents to all of these.

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A 28-year-old member asked:

What factors in the body affect the cardiac output?

2 doctor answers6 doctors weighed in
Dr. Charles Jost
Cardiology 36 years experience
Many factors: Congenital heart disease, vitamin b1 defiency, anemia, thyroid problem, renal disease, liver disease, brain disease, vascular disease, blood disease, atherosclerosis, valve disease - these are the biggest influencers of cardiac output.
A 52-year-old member asked:

What are factors that influence the cardiac output?

2 doctor answers6 doctors weighed in
Dr. Mark Milunski
Cardiology 37 years experience
Cardiac output: In strict physiologic terms, cardiac output is determined by something called stroke volume and heart rate. Heart rate is self-explanatory. Stroke volume is the amount of blood that the heart pumps out with each beat. This in turn is dependent on blood pressure, total blood volume, and how strong the heart contracts.
CA
A 38-year-old member asked:

What systems affect cardiac output?

2 doctor answers5 doctors weighed in
Dr. Rajat Jhanjee
Cardiology 20 years experience
Heart rate, volume: Cardiac output is affected by heart rate and the volume of blood pumped out of the heart in each heart beat (stroke volume). Factors that increase the heart rate (anxiety, fever, walking) increase cardiac output. Similarly, factors that increase volume of blood that heart pumps with each cycle increase cardiac output. High level athletes have very high stroke volume, because of conditioning.
A 32-year-old member asked:

What are some factors affecting abnormal cardiac output?

1 doctor answer1 doctor weighed in
Dr. Frederick Tibayan
Thoracic Surgery 23 years experience
Many factors: Heart muscle not getting enough blood - ischemia. Abnormal heart muscle - cardiomyopathy. Valve disease. High blood pressure or too much afterload. Abnormal pumping rhythm. Difficulty filling heart.
Malaysia
A 20-year-old female asked:

How could venoconstriction affect cardiac output?

1 doctor answer1 doctor weighed in
Dr. Bennett Werner
Cardiology 44 years experience
Venoconstriction?: Cardiac output is inversely proportional to total peripheral resistance (which is related to mean arterial pressure.) venoconstriction refers to the venous system and can't be measured. If venous return increases, preload increases, and by starling's law of the heart, cardiac output increases. However, severe venoconstriction could eventually diminish venous return and reduce co. Yes?

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Last updated Feb 8, 2019

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