Key result
Simultaneous echocardiography and phonocardiography demonstrate markedly delayed ATL closure in Ebstein's anomaly despite RV preexcitation.
Why the study?
Is delayed anterior tricuspid leaflet closure in Ebstein's anomaly due to right bundle-branch block or a specific feature of the anomaly?
Case Report (n=2)
Is delayed anterior tricuspid leaflet closure in Ebstein's anomaly due to right bundle-branch block or a specific feature of the anomaly?
Delayed anterior tricuspid leaflet closure in Ebstein's anomaly appears to be a specific structural feature of the condition rather than a consequence of right bundle-branch block.
Supports delayed tricuspid leaflet closure as intrinsic to Ebstein's anomaly; leaves open confirmation beyond this single case.
The echocardiographic features of Ebstein's anomaly include a large anterior chamber, paradoxic ventricular septal motion (type B), increased velocity and amplitude of anterior tricuspid leaflet (ATL) motion, and delayed closure of the ATL. This delayed closure has been thought to be secondary to right bundle-branch block (RBBB). We have studied two patients by simultaneous echocardiography and phonocardiography. The findings in both patients were similar. One patient had RBBB and therefore resembles the previously reported patients. However, the other patient had W-P-W preexcitation syndrome, type B, and is reported here in more detail. The ATL closure of this patient was markedly delayed in spite of right ventricular preexcitation. This finding gives further insight into the altered pathophysiology in Ebstein's anomaly and implies that the delayed ATL closure is probably not due to RBBB and may be a specific feature of this anomaly.
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Tajik et al. (1973) conducted a case report in Ebstein's anomaly (n=2). Simultaneous echocardiography and phonocardiography was evaluated on Anterior tricuspid leaflet (ATL) closure delay. Simultaneous echocardiography and phonocardiography demonstrated markedly delayed anterior tricuspid leaflet closure in a patient with Ebstein's anomaly despite right ventricular preexcitation.
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