Background: The deceleration time of the pulmonary venous diastolic flow has been well-correlated with invasive pulmonary capillary wedge pressure in several studies regardless of left ventricular systolic function. This study was conducted to correlate deceleration time of pulmonary venous diastolic wave, DT(D), and left atrial pressure (LAP), obtained noninvasively from mitral early diastolic inflow velocity-to-early diastolic mitral annulus velocity ratio (E/e'), and to assess the ease of each method in patients with coronary artery disease undergoing off-pump coronary artery bypass grafting (OPCAB) by transesophageal echocardiography.
Methods: Forty-five adult patients with coronary artery disease, with left ventricular ejection fraction of ≥50% posted for elective OPCAB were enrolled in the study.
Results: Forty values of LAP and DT(D) were analyzed. A significant linear correlation (r = -0.64) was found between DT(D) and LAP. Area under the curve of DT(D) of ≤183 ms for predicting elevated LAP (>15) was 0.903 (95% confidence interval: 0.767 to 0.974, P < 0.0001).
Conclusion: Deceleration time of pulmonary venous flow diastolic waveform, DT(D), feasible promising echocardiographic measure in determining elevated LAP and DT(D)≤183 ms predicts elevated LAP.
Keywords: Deceleration time; E/e′; left atrial pressure; pulmonary venous flow.