Philippe Pibarot et al. JIMG 2015;8:

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Philippe Pibarot et al. JIMG 2015;8:340-360 AR Index for the Assessment of PVR Severity The aortic regurgitation (AR) index can be used for quantitating AR severity following transcatheter heart valve (THV) deployment; it is calculated as the ratio of the diastolic transvalvular pressure gradient to the systolic blood pressure measured by left heart catheterization. In the patient with moderate paravalvular regurgitation (PVR) (A), the AR index is 16.7, whereas in the patient with trace PVR (B), the index is 30.8. Adapted with permission from Sinning et al. (16). DBP = end-diastolic blood pressure in the aorta; LVEDP = left-ventricular end-diastolic pressure; SBP = systolic blood pressure in the aorta. Philippe Pibarot et al. JIMG 2015;8:340-360 American College of Cardiology Foundation