What is the 'pullback' technique used for during hemodynamic assessment of aortic stenosis?
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A
Measuring LVEDP while withdrawing from LV to aorta
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B
Withdrawing the catheter from the pulmonary artery to the right ventricle to measure pulmonic gradient
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C
Measuring the pressure gradient across the aortic valve as the catheter is pulled from the LV to the ascending aorta
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D
Assessing mitral valve gradient during withdrawal from PCWP to PA