What is the typical stroke volume for an adult heart?

The typical stroke volume for an adult heart is approximately 70 mL per beat. Stroke volume refers to the amount of blood pumped by the left ventricle of the heart in one contraction. This volume can vary slightly based on factors such as the individual’s size, fitness level, and health status, but 70 mL is regarded as an average value for a healthy adult at rest.

This figure is critical for understanding cardiac output, which is the volume of blood the heart pumps per minute and is calculated as the stroke volume multiplied by the heart rate. A typical stroke volume of around 70 mL is utilized when calculating cardiac output in clinical settings, indicating a healthy level of blood circulation to meet the metabolic demands of the body. In contrast, the other figures – 50 mL, 90 mL, and 110 mL – are either too low or too high for an average adult’s stroke volume, making 70 mL the most appropriate choice.