Which medication is an inotrope commonly used in shock?

Which medication is an inotrope commonly used in shock?

• A. Dobutamine
• B. Normal saline
• C. Furosemide
• D. Labetalol

Answer: (A)

Boosting heart muscle contractility is a key way to improve perfusion when the heart isn’t pumping enough blood. Dobutamine works by stimulating beta-1 receptors in the heart, which increases the force of contraction and raises stroke volume and overall cardiac output. This makes it a go-to inotropic support in shock states where the heart’s pumping ability is depressed, such as cardiogenic shock, and when there’s a need to improve forward flow without markedly increasing vascular resistance. In contrast, normal saline adds volume to the circulation, helping in hypovolemic states but not increasing the heart’s pumping strength. Furosemide is a diuretic used to reduce fluid overload, not to enhance contractility. Labetalol is a beta-blocker that lowers heart rate and blood pressure, so it would reduce inotropy rather than improve it.

Boosting heart muscle contractility is a key way to improve perfusion when the heart isn’t pumping enough blood. Dobutamine works by stimulating beta-1 receptors in the heart, which increases the force of contraction and raises stroke volume and overall cardiac output. This makes it a go-to inotropic support in shock states where the heart’s pumping ability is depressed, such as cardiogenic shock, and when there’s a need to improve forward flow without markedly increasing vascular resistance.

In contrast, normal saline adds volume to the circulation, helping in hypovolemic states but not increasing the heart’s pumping strength. Furosemide is a diuretic used to reduce fluid overload, not to enhance contractility. Labetalol is a beta-blocker that lowers heart rate and blood pressure, so it would reduce inotropy rather than improve it.