Normal cardiac output is?

Normal cardiac output is?

• A. 2-3 L/min
• B. 4-8 L/min
• C. 8-12 L/min
• D. 1-1.5 L/min

Answer: (B)

Cardiac output is the amount of blood the heart pumps each minute, and it equals heart rate times stroke volume. At rest, a typical heart rate is about 60–100 beats per minute and stroke volume is around 60–80 mL, which gives roughly 4–8 liters per minute of blood pumped. This range reflects normal tissue perfusion while at rest across adults of different sizes. Values well below this, like 2–3 or 1–1.5 L/min, indicate reduced output and can be seen in serious heart dysfunction or shock. Values higher than about 8 L/min can occur during intense exercise or hyperdynamic states, but aren’t considered normal at rest. So the normal resting cardiac output is about 4–8 L/min.

Cardiac output is the amount of blood the heart pumps each minute, and it equals heart rate times stroke volume. At rest, a typical heart rate is about 60–100 beats per minute and stroke volume is around 60–80 mL, which gives roughly 4–8 liters per minute of blood pumped. This range reflects normal tissue perfusion while at rest across adults of different sizes. Values well below this, like 2–3 or 1–1.5 L/min, indicate reduced output and can be seen in serious heart dysfunction or shock. Values higher than about 8 L/min can occur during intense exercise or hyperdynamic states, but aren’t considered normal at rest. So the normal resting cardiac output is about 4–8 L/min.