Effective inflation of an intra-aortic balloon pump should occur at which time?

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Multiple Choice

Effective inflation of an intra-aortic balloon pump should occur at which time?

Explanation:
The timing tested is diastole. Intra-aortic balloon pump inflation should occur immediately after the aortic valve closes, so during diastole. This raises diastolic aortic pressure and improves coronary perfusion without hindering left ventricular ejection. Inflating during atrial contraction, opening of the aortic valve, or the systolic upstroke would oppose ejection and increase afterload, which is undesirable.

The timing tested is diastole. Intra-aortic balloon pump inflation should occur immediately after the aortic valve closes, so during diastole. This raises diastolic aortic pressure and improves coronary perfusion without hindering left ventricular ejection. Inflating during atrial contraction, opening of the aortic valve, or the systolic upstroke would oppose ejection and increase afterload, which is undesirable.

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