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Accuracy of the Single Cycle Length Method for Calculation of Aortic Effective Orifice Area in Irregular Heart Rhythms

Authors:	Kerry A Esquitin Omar K Khalique Qi Liu Susheel K Kodali Leo Marcoff Tamim M Nazif Isaac George Torsten P Vahl Martin B Leon Rebecca T Hahn

Institution:	1. Columbia University Medical Center/New York-Presbyterian Hospital, New York, New York;2. Morristown Medical Center, Morristown, New Jersey

Abstract:

Keywords:	Aortic valve Aortic stenosis Echocardiography Continuity equation Atrial fibrillation Transcatheter aortic valve replacement AF Atrial fibrillation AS Aortic stenosis AV Aortic valve DVI Doppler velocity index EOA Effective orifice area FE Frequent ectopy (atrial and ventricular premature contractions) ICC Intraclass correlation coefficient LVOT Left ventricular outflow tract R-R1 Interval (in milliseconds) between beats for the preceding interval R-R2 Interval (in milliseconds) between beats for the prepreceding interval TTE Transthoracic echocardiogram Velocity time integral of the transaortic flow on continuous wave Doppler Velocity time integral of the left ventricular outflow tract flow on pulsed wave Doppler
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