M-mode Diagnosis of Tachyarrhythmia Can be Erroneous Owing to “Pseudo 1:1 Atrioventricular Movement” of the Atrial Wall Adjacent to the Atrioventricular Valve Possibly due to Atrioventricular Constraint: A Case of Neonatal Atrial Flutter With 2:1 Atrioventricular Conduction
Abstract:M-mode echocardiography has been playing an important role in the diagnosis of
fetal tachyarrhythmia. We recently encountered a neonatal case of atrial flutter
with 2:1 atrioventricular conduction. However, M-mode erroneously indicated 1:1
atrioventricular movement. While the movement of the atrial wall far from the
atrioventricular valve was much faster than that of the ventricular wall, the
atrial wall adjacent to the atrioventricular valve fully synchronized to that of
the ventricular wall. Thus, to avoid t… Show more
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