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J Am Coll Cardiol, 2004; 44:1543-1549, doi:10.1016/j.jacc.2004.07.034 © 2004 by the American College of Cardiology Foundation |
,*
* Department of Medicine, College of Physicians and Surgeons
Department of Medicine, New York University School of Medicine, New York, New York
Manuscript received December 8, 2003; revised manuscript received July 6, 2004, accepted July 12, 2004.
* Reprint requests and correspondence: Dr. Itzhak Kronzon, New York University School of Medicine, 550 First Avenue, New York, New York 10016 (Email: itzhak.kronzon{at}med.nyu.edu).
Heart failure with a normal ejection fraction (HFNEF) predominately afflicts older, female individuals and is considered to be a consequence of diastolic dysfunction. Doppler echocardiography has become the standard method for identifying and characterizing diastolic function. However, the important distinction between Doppler measures of filling dynamics and true indexes of intrinsic ventricular diastolic chamber properties is not widely appreciated. Herein, we delineate physiologic measures of intrinsic ventricular diastolic function, as determined by pressure volume analysis, and compare and contrast these measures with those derived from Doppler echocardiography. Doppler-derived indexes of ventricular filling do not provide specific information on intrinsic passive diastolic properties, and thus, abnormal filling dynamics do not necessarily equate with intrinsic myocardial diastolic dysfunction. This raises a fundamental question as to whether delayed relaxation and/or stiffened passive properties are the unifying pathophysiologic mechanisms in all patients who present with HFNEF.
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