PMC7952125_01
Resolution of LAA Smoke After Administration of Isoproterenol. (A) Transesophageal echocardiogram demonstrating smoke in the left atrial appendage (LAA), which is concerning for possible thrombus. (B) Transesophageal echocardiographic imaging after 5-min infusion of isoproterenol, which demonstrates no evidence of LAA thrombus. See Online Videos 1 and 2.
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F1
Pre-procedural transesophageal echocardiography (TEE) demonstrated dense SEC in the LAA that had not cleared despite changes in his anticoagulant medications (Figure 1A). LAA thrombus was identified (Figure 1B, Online Videos 1 and 2). LAA velocity measured by pulsed-wave Doppler did not change substantially from pre-infusion to peak infusion (10.7 cm/s vs. 10 cm/s, respectively).