Abstract 8696: Assessment of Time-Left Atrial Volume Curve and Left Atrial Emptying Function by Speckle Tracking Echocardiography is Useful to Evaluate Left Ventricular Diastolic Function in Patients with Preserved Ejection Fraction

TL;DRAbstract

Background: Left atrial (LA) volume is proposed to evaluate left ventricular (LV) filling pressure and E/e' is used to estimate LV diastolic function instead of invasive measurement. However, it is difficult to measure LA volume accurately and quickly using routine echocardiography and E/e' from 8 to 15 is classified as a gray zone to estimate LV filling pressure. Thus, we assessed the hypothesis that evaluation of time-LA volume curve and LA emptying function (EF) measured by speckle tracking may be more useful to estimate LV diastolic function as a noninvasive method in the clinical settings than E/e' . Methods : LA phasic volume and EF were measured in 34 patients (age 69±8, 14 men) with LV ejection fraction ≥50% by speckle tracking echocardiography that can provide time-LA volume curve automatically, and E/e' was also obtained just before cardiac catheterization, and these parameters were compared with pulmonary capillary wedge pressure (PCWP). Results : LA max. and min. volume had

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