Simultaneous Doppler Tracing of Transmitral Inflow and Mitral Annular Velocity as an Estimate of Elevated Left Ventricular Filling Pressure in Patients With Atrial Fibrillation

Abstract

The time interval between the onset of early transmitral flow velocity (E) and that of early diastolic mitral annular velocity (e') (T(E-e')) is a good predictor of elevated left ventricular (LV) filling pressure in patients with sinus rhythm. Although the evaluation of LV filling pressure using E/e' has been challenging in atrial fibrillation (AF), the usefulness of T(E-e') is unknown. E and e' were simultaneously recorded using dual Doppler echocardiography in 45 AF patients (30 men; mean age, 69 ± 9 years). E/e' and T(E-e') were calculated and compared with the pulmonary capillary wedge pressure (PCWP), which was measured invasively. E/e' and T(E/e') correlated with PCWP (E/e', r=0.57, P<0.001; T(E-e'), r=0.77, P<0.001). Using receiver operating characteristic analysis, the optimal cut-off for T(E-e') was 34 ms (sensitivity, 95%; specificity, 88%) and that for E/e' was 14.6 (sensitivity, 50%; specificity, 84%) in order to predict >12-mmHg PCWP. When the combined cut-offs of T(E-e') >34 ms and E/e' >14.6 were used, the sensitivity and specificity of predicting elevated PCWP were improved to 100% and 88%, respectively. In AF patients, the simultaneous recording of E and e' using dual Doppler echocardiography and the analysis of T(E-e'), in addition to E/e', improved the accuracy of evaluation of LV filling pressure.