CARDIAC echocardiography has many clinical uses. The normal movement of the posterior left atrial wall in sinus rhythm has been described, but there is little published information about left atrial wall movement in atrial arrhythmias.1
Report of a Case
A 64-year-old man with a ventricular rhythm of 125 beats per minute had an electrocardiographic rhythm strip that did not show definitive atrial activity. The echocardiogram showed presystolic 1-cm anterior movements of the posterior left atrial wall at a rate of 250/min (twice the rate of the simultaneously recorded QRS complexes [Fig 1]). After cardioversion with 30 Watt-seconds of energy, presystolic 1-cm anterior movements of the posterior left atrial wall at a rate of 60 beats per minute, equal to that of the simultaneously recorded QRS complexes, were demonstrated (Fig 2).Posterior left atrial wall echocardiography can be used in the diagnosis of arrhythmias especially in cases in which electrocardiography
Sasse L. Echocardiography of Left Atrial Wall. JAMA. 1974;228(13):1667. doi:10.1001/jama.1974.03230380035020
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