observe the image above and answer the following: 1 ) calculate the heart rate i
ID: 57581 • Letter: O
Question
observe the image above and answer the following:
1) calculate the heart rate in beats per minute
2) calculate the stroke volume (in mL per beat)
3) calculate the cardiac output in L/min
4)which of the following statements about the point labelled F in the diagram are true?
- F occurs at the end of the isovolumetric relaxation
- F occurs at the end of the isovolumetric contraction
- at the point in the cardiac cycle when the volume of blood in the right ventricle is volume F, then the volume of blood in the left ventricle is also volume F
- at the point in the cardiac cycle when the volume of the blood in the right ventricle is volume F, then the volume of blood in the left ventricle is less than F
- at the point in the cardiac cyle when the volume of blood in the right ventrivle is volume F, then the volume of blood in the left ventricle is greater than volume F.
Time (msec) 0 100 200300 400 500 600 700 800 135 Left ventricular volume (mL) Atrial systole Ventricular systole Ventricular diastole Atrial systoleExplanation / Answer
1. Here it is showing 1 heart beat in 0.8 sec. So heart rate in 1 minute = HR = 60/ 0.8 = 75 beats/ min.
2. Stroke volume = SV = 135 - 65 mL / beat = 70 mL /beat.
3. Cardiac output = HR * SV = 75 * 70 ml/ min = 5250 mL / min = 5.25 L / min.
4. This is true- F occurs at the end of the isovolumetric contraction.
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