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A 25-year-old member asked:

Why would someone have low cardiac output?

2 doctor answers4 doctors weighed in
Dr. Nassir Azimi
Interventional Cardiology 23 years experience
Congestive heart: Failure can be cause of low cardiac output. If the pump is weak and failing then cardiac out put would be low. Very slow heart rate can also result in low cardiac output.
Dr. Bennett Werner
Cardiology 44 years experience
Size related: Cardiac output is directly related to your body surface area (your size). Small people have low cardiac outputs. Perhaps you meant cardiac index? This the co indexed to body size. If it's low, it's because the stroke volume or the heart rate is too low. Sv can be low when the the heart is beating weakly or blood is moving in the wrong direction due to valve disease or a shunt between the chambers.

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A 31-year-old member asked:

What happens when you have low or high cardiac output?

1 doctor answer6 doctors weighed in
Dr. Mazen Kherallah
Infectious Disease 34 years experience
Fatigue: Low cardiac output will lead to fatigue and shortness of breath. High cardiac output failure caused by severe anemia or paget's disease have similar manifestation.
A 31-year-old member asked:

I'm curious what could happen when cardiac output is low and what if it's high?

1 doctor answer2 doctors weighed in
Dr. Carlos Orrego
Cardiology 28 years experience
Low cardiac output: Cardiac output depends on heart rate and stoke volume. Therefore, the cardiac output increases when heart rate goes up in normal heart. However, when the heart is failing the stroke volume is lower as well as the cardiac out which is called heart failure . Sometimes, heart failure could occur when cardiac output is high due to other medical problems such as a severe anemia , hyperthyroidism, etc
A 46-year-old member asked:

What happens to the body when cardiac output is low and high?

1 doctor answer3 doctors weighed in
Dr. Calvin Weisberger
Cardiology 51 years experience
Cardiac output: Low cardiac output has low bp, high heart rate, cold, clammy, impaired mention, may be short of breath, decreased urine output . High cardiac output usually the obverse with warm, bounding pulses, increased BP may have increased urine output.

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Last updated Nov 26, 2013
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