Question

What is SV (stroke volume)? How do you calculate it? What're the normal values?

a) Stroke Volume is the volume of blood pumped per heartbeat; SV = End Diastolic Volume - End Systolic Volume; Normal values range from 60-100 mL/beat
b) Stroke Volume is the rate of blood flow; SV = Cardiac Output / Heart Rate; Normal values range from 120-160 mL/beat
c) Stroke Volume is the amount of oxygen in the blood; SV = Oxygen Saturation x Hemoglobin; Normal values range from 90-95%
d) Stroke Volume is the volume of blood in the ventricles; SV = Aortic Pressure x Ventricular Compliance; Normal values range from 80-120 mL/beat

Answer 1

Stroke Volume (SV) is the volume of blood pumped by each ventricle of the heart per heartbeat. It is calculated by subtracting the End Systolic Volume (ESV) from the End Diastolic Volume (EDV): SV = EDV - ESV. Normal values range from 55-100 mL/beat.

Step-by-step explanation:

Stroke Volume (SV) is the volume of blood pumped by each ventricle of the heart per heartbeat. It is calculated by subtracting the End Systolic Volume (ESV) from the End Diastolic Volume (EDV): SV = EDV - ESV. Normal values range from 55-100 mL/beat.

SVs are also used to calculate the ejection fraction, which is the percentage of blood pumped out of the heart with each beat. Ejection fractions range from approximately 55-70 percent.

The measurement of SV is typically done non-invasively using an echocardiogram or can be measured invasively using a specialized catheter.