What is the percentage of cardiac output delivered to the heart?

About 4% About 4% of the cardiac output goes to the heart muscle itself. That is the same either at rest or with exercise.
Cardiac output. The major organs get about 80% of the total co. The percent each gets varies depending on the dynamics going on. As the heart can vary its resistance markedly coronary blood flow can vary by a factor of 5 depending on heart rate and resistance so it isn't a constant percent of co.

Related Questions

How does the heart increase cardiac output?

Two ways. Either by pumping out more blood with each beat (by squeezing harder) or by beating faster. The output is the heart rate times the stroke volume. (the amount of blood pumped out with each beat). Read more...
Cardiac output. This is a product of stroke volume or cc's of blood per beat times the heart rate so cardiac output increases with either an increase in stroke volume or heart rate or both. Read more...

What is an abnormal heart rate that can impair cardiac output called?

Cardiac Output. Cardiac output equals stroke volume x heart rate. That means if the heart rate goes up the cardiac output will go up. The stroke volume is how much the heart pumps out with each contraction. That can go down if the heart rhythm is off like in atrial fibrillation. Read more...

What happens to cardiac output and after load when when heart rate is low? Does it increase because high heart rate causes decrease in CO

Varies. BUT in a young healthy person, generally the heart rate is low because the heart is efficiently pumping and the cardiac output is good. Generally, (in normals), increasing the heart rate increases pumping and cardiac output. Read more...

What to do if a transplanted heart has no nerve supply, how does the cardiac output of a transplanted heart increase and adapt to physiological changes?

Hormonal +/- nervous. The transplanted heart responds to hormonal changes. There is also some evidence that the transplanted heart may have some sympathetic re-innervation and possibly conduction of signals from the old sinus node to the new heart. Read more...

What is main test for heart strength? Echo? What about the cardiac output?

Echo. Echo is the simplest, easiest, cheapest, fastest way to determine the heart's strength ("ejection fraction"). Cardiac output, which is the product of heart rate and stroke volume (the amt of blood ejected per beat) can be calculated. Mri is more accurate but far more expensive and takes longer. Cardiac catheterization is the oldest way & still works fine for both but is invasive & more expensive. Read more...
Echocardiography. There are other modalities that can calculate "heart strength" (how well is the heart pumping blood) and cardiac output (how many liters of blood are pumped per minute) but the most accessible and non-invasive is an echo. By measuring the heart when full of blood and then when fully contracted you can estimate the effectiveness of the "squeeze" as well as the volume pumped. Read more...

How can I find stroke volume and heart rate given cardiac output equation?

SVxHR=CO. You can count your heart rate by taking your pulse. That's the easy part. To get SV, you can do an echo to estimate it or do a right heart catheterization and perform a thermodilution and Fick measurements. (That's how cardiologists obtain it), Read more...

Can you tell me what occurs to heart rate, stroke volume and cardiac output during exercise?

All increase. Exercise causes an increased demand for blood flow to provide oxygen to the muscles doing the work. This is accomplished by increase in heart rate and stoke volume. Since cardiac output is determined by heart rate and stroke volume, it also goes up. Blood pressure also typically increases with strenuous exercise. Read more...

What are the signs and symptoms of left sided heart failure associated with decreased cardiac output?

Swelling. The left side of the heart pumps blood throughout your body. When it fails, it decreases blood flow to organs. This can cause kidney injury, liver injury, fatigue, shortness of breath with little exertion, swelling of the feet and legs, fluid build-up in the lungs, and difficulty sleeping flat due to shortness of breath. Medications and diet are important for this disease! Read more...