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Figure 3 Left atrial appendage flow in the representative animal shown in Figure 2 at baseline (top left panel), and after one week of rapid atrial pacing at 400 beats/min (bottom left panel), two weeks of rapid ventricular pacing at 220 beats/min (top right panel), and both rapid atrial and ventricular pacing (bottom right panel). Recordings were obtained during atrioventricular sequential pacing at 80 beats/min. The "e" and "a" waves correspond to early ventricular diastole and left atrial systole, respectively. Doppler scale = 20 cm/s. See text for details.
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