What impact would dobutamine and dopamine have on LVSWI?
A) dobutamine would increase it while dopamine would decrease it
B) dopamine would increase it while dobutamine would decrease it
C) Both would increase it
D) Both would decrease it

Question

Quizplus · Accepted Answer

Both dobutamine and dopamine are positive inotropes, meaning they increase the force of the heart's contraction. Dobutamine specifically acts on beta-1 adrenergic receptors, leading to increased cardiac output without significantly increasing heart rate. Dopamine, at moderate doses, also increases cardiac output and heart rate by stimulating both beta-1 adrenergic and dopaminergic receptors. Therefore, both agents would increase left ventricular stroke work index (LVSWI), which is a measure of the work done by the left ventricle per beat.

What Impact Would Dobutamine and Dopamine Have on LVSWI