AR Index

ECHONOMY
Tools for Echocardiographic Calculations
Muhamed Saric, MD, PhD
New York University

AR Index

Aortic Regurgitation (AR) Index Post TAVR

	A pressure index based on invasive intracardiac and arterial blood pressures.
	The more severe the aortic regurgitation post TAVR, the lower the value of the AR index

Formula

AR index = (DPB - LVEDP) / SBP

DBP, diastolic blood pressure; LVEDP, left ventricular end-diastolic pressure; SBP, systolic blood pressure (all pressures expressed in mm Hg).

Figure

Reference Values

Reference

Sinning JM, Hammerstingl C, Vasa-Nicotera M, et al. Aortic regurgitation index defines severity of peri-prosthetic regurgitation and predicts outcome in patients after transcatheter aortic valve implantation. J Am Coll Cardiol 2012;59:1134–41.