Tasneem Z. Naqvi JIMG 2010;3:1168-1180 Pulmonary Vein Atrial Reversal and Diastolic MR at Short and Long AVDs Effect of a very short atrioventricular delay.

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Tasneem Z. Naqvi JIMG 2010;3:1168-1180 Pulmonary Vein Atrial Reversal and Diastolic MR at Short and Long AVDs Effect of a very short atrioventricular delay (AVD) on mitral inflow and pulmonary vein inflow is shown in A and B and that of long AVD on mitral inflow and MR in C and D. A short AVD leads to absence of mitral inflow A-wave and marked pulmonary vein atrial reversal (B, white arrow). Prolonged AVD causes E and A approximation (C), shortening of diastolic filling time (C), and appearance of diastolic mitral regurgitation (MR) (white arrows, D). (E) Shows intermittent diastolic MR (white arrow) at an AVD of 130 ms with complete resolution at an AVD of 80 ms (F). Diastolic tricuspid regurgitation is shown at an AVD of 200 ms (white arrows, G) with resolution at an AVD of 80 ms (H) and a reduction in right ventricular–right atrial gradient in H compared with G. Tasneem Z. Naqvi JIMG 2010;3:1168-1180 American College of Cardiology Foundation