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What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricls at the end of the diastole is 100mL and at the end of ventricular systole is 50mL?
- Option 1)
50 beats per minute
- Option 2)
75 beats per minute
- Option 3)
100 beats per minute
- Option 4)
125 beats per minute
Answers (1)
Cardiac Output -
The stroke volume multiplied by the heart rate (number of beats per min.) gives the cardiac output.
- wherein
The cardiac output can be defined as the volume of blood pumped out by each ventricle per minute and averages 5000 mL or 5 litres in a healthy individual. The body has the ability to alter the stroke volume as well as the heart rate and thereby the cardiac output. For example, the cardiac output of an athlete will be much higher than that of an ordinary man.
Cardiac output is the product of heart rate ( number of beats per minute) and te stroke volume.
Given
Cardiac output [CO] = 5L
Stroke volume [SV] = EDV - ESV = 100mL - 50mL = 50mL or 0.05L
Heart rate = beats per minute
Option 1)
50 beats per minute
Option 2)75 beats per minute
Option 3)100 beats per minute
Option 4)125 beats per minute
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