Is stroke volume the same as cardiac output

Stroke output and cardiac output are different indicators of cardiac function, and they are not the same. Stroke output refers to the amount of blood ejected from one ventricle during each contraction of the heart, while cardiac output is the total amount of blood ejected from one ventricle per minute, calculated by multiplying stroke output by heart rate.

Stroke output reflects the efficiency of a single cardiac contraction, which is approximately 60-80 milliliters in a normal adult's resting state. The cardiac output reflects the heart's ability to pump blood per minute, which is approximately 4-6 liters in a quiet state. During exercise or stress, cardiac output can be increased by increasing heart rate or stroke volume. Cardiac output is a core indicator for evaluating the overall pumping function of the heart, while stroke volume focuses more on single contraction efficiency. The values of the two are influenced by factors such as age, position, and exercise status, and clinical monitoring is often combined to determine the state of cardiac function.

Daily aerobic exercise can enhance cardiac reserve function, such as brisk walking, swimming, etc; Avoid high salt diets and excessive alcohol consumption to reduce heart load; Pay attention to the ejection fraction indicators in the echocardiogram report during regular physical examinations. If symptoms such as shortness of breath and lower limb edema occur after activity, it is recommended to undergo specialized examinations such as cardiac ultrasound and exercise stress test in a timely manner.