Click on image to view larger version.

Figure 2 A, Diagram of LAA flow in sinus rhythm. 1, LAA contraction; 2, LAA filling; 3, systolic reflection waves (positive and negative); 4, early diastolic LAA outflow (see text for details). B, Pulsed-Doppler tracing of LAA flow in sinus rhythm (flow signals 1 to 4 as in A).