Cardiac output is the volume of blood pumped by the heart in a minute. At rest this is about 5 litres in one minute and during exercise cardiac output can increase up to 30 litres in one minute. Heart rate is the number of beats per minute and the stroke volume is the amount of blood pumped out of the heart with each beat. Increasing either one of these will increase cardiac output.
Cardiac output is dependant on the amount of blood returning to the right side of the heart. During exercise the blood returning increases so the cardiac output increases. This is caused by the myocardium being stretched which causes it to contract with greater force. It changes the sodium and potassium balance in the heart which increases the myocardial temperature which changes the heart rate.
My cardiac output is: 80x80=6400 which is 6.4 litres a minute.
Every ones cardiac output is different this could be due to do with someones height, weight, age and the demands of the individuals body.
If someone has a low cardiac output they may be prone to low blood pressure, fainting as you are not getting enough oxygen to the brain and you are not getting rid of the carbon dioxide out of your body.
Cardiac output should be taken at different times of the day dependant of what you are doing and you will get a better reading of your cardiac output by doing this.
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