Key result
A patient with ventricular fibrillation and right bundle branch block exhibited beat-to-beat alternation of ST segment morphology between coved and saddle-back types in precordial leads.
This case report provides the first documented observation of beat-to-beat variation between coved and saddle-back ST segment morphologies in a patient with Brugada-like ECG patterns and ventricular fibrillation.
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Alerts to possible ECG instability in VF with RBBB; leaves open clinical significance and requires prospective validation.
Hirata et al. (1998) studied this question. A patient with ventricular fibrillation and right bundle branch block exhibited beat-to-beat alternation of ST segment morphology between coved and saddle-back types in precordial leads.
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