Early deflation waveform characteristics include which of the following?

Early deflation waveform characteristics include which of the following?

• A. Assisted systolic rises toward unassisted
• B. Diastolic augmentation looks fine
• C. Loss of afterload reduction
• D. Slurred upstroke

Answer: (C)

Intra-aortic balloon pump timing controls how the device affects the heart’s loading conditions. The balloon should inflate during diastole to boost coronary perfusion and deflate just before the heart systoles to unload the left ventricle and reduce afterload. If deflation happens too early—before the onset of LV ejection—the balloon is already deflated when systole begins, so there’s no afterload-reducing effect during ejection. The net result is a loss of afterload reduction, which is reflected in the waveform and hemodynamics as the heart working with near-native afterload during systole. The other descriptors reflect different waveform or monitoring issues (such as damping of the arterial line) that aren’t the direct consequence of premature deflation timing.

Intra-aortic balloon pump timing controls how the device affects the heart’s loading conditions. The balloon should inflate during diastole to boost coronary perfusion and deflate just before the heart systoles to unload the left ventricle and reduce afterload. If deflation happens too early—before the onset of LV ejection—the balloon is already deflated when systole begins, so there’s no afterload-reducing effect during ejection. The net result is a loss of afterload reduction, which is reflected in the waveform and hemodynamics as the heart working with near-native afterload during systole. The other descriptors reflect different waveform or monitoring issues (such as damping of the arterial line) that aren’t the direct consequence of premature deflation timing.