Key result
Treatment with propafenone tid gradually decreased premature junctional beats and resolved pseudo-atrioventricular block in a 13-year-old girl.
Why the study?
Complex and simultaneous atrioventricular conduction abnormalities in a female teenager are extremely rare in clinical practice and require detailed characterization.
Case Report (n=1)
No
Answers are grounded in this paper and cite their sources.
Proper recognition of pseudo-AVB, a generally benign phenomenon, can prevent erroneous permanent pacemaker implantation.
A 13-year-old girl was admitted to the Cardiology Clinic of West China Hospital with complains of recurrent palpitations for 1 year, dizziness, and chest tightness. Her ECG intercepted at different time periods in the Holter exhibited complex electrophysiological phenomena, such as sinus arrhythmia, dominant PJB, interpolated PJB, concealed PJB, isolated forward block, insularly retrograde block, reciprocal beat, junctional escape beat, interference atrioventricular dissociation, pseudo-I°AVB, and pseudo-II°AVB, which occurred simultaneously. This condition is extremely rare in clinical practice. The patient was prescribed an antiarrhythmic drug (propafenone 50 mg tid). After treatment, the PJB gradually decreased, and the pseudo-AVB disappeared. Pseudo AVB is generally a benign phenomenon and proper recognition may avoid erroneously permanent pacemaker implantation.
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Chen et al. (2022) conducted a case report in Complex electrophysiological phenomena including pseudo-atrioventricular block (n=1). Propafenone was evaluated on Reduction of premature junctional beats and disappearance of pseudo-AVB. Treatment with propafenone tid gradually decreased premature junctional beats and resolved pseudo-atrioventricular block in a 13-year-old girl.
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