What is the typical stroke volume (SV) at rest?

The typical stroke volume at rest is approximately 70 mL. Stroke volume refers to the amount of blood pumped by the left ventricle of the heart in one contraction. At rest, a stroke volume of around 70 mL is considered an average value for a healthy adult, reflecting a balance between the volume of blood returning to the heart and the heart's capability to pump efficiently.

This value is influenced by various factors, including the size of the heart, the level of fitness of the individual, and the overall cardiovascular health. It is important in assessing cardiovascular function, as stroke volume, along with heart rate, contributes to cardiac output, which is vital for delivering oxygen and nutrients to tissues throughout the body.

In contrast, values such as 50 mL, 100 mL, or 125 mL do not typically represent the average stroke volume at rest for healthy adults. A stroke volume significantly lower than 70 mL could indicate issues with heart function, while values that are substantially higher than 70 mL might suggest an athletic condition or other physiological adaptations that are not common at rest in the average population.