A 15‐year‐old female with recurrent episodes of wide‐QRS tachycardia responsive to intravenous adenosine was referred to our arrhythmia center to undergo an electrophysiological study (EPS). Physical examination, blood tests, chest radiograph, and echocardiogram were all unremarkable. Baseline 12‐lead ECG showed normal sinus rhythm (SR) without evidence of ventricular preexcitation. Before the procedure, continuous 12‐lead ECG recording revealed SR with transient phases of wider‐QRS rhythm (WQR), showing left bundle branch block (LBBB) morphology at a similar heart rate (HR). Based on the presented data what is the most likely underlying mechanism of these electrocardiographic observations?
Transient baseline rhythm changes unmasking an uncommon arrhythmic substrate / Ali, Hussam; De Ambroggi, Guido; Lupo, Pierpaolo; Foresti, Sara; Cristiano, Ernesto; Farghaly, Ahmad Abdelrady Abdelsalam; Cappato, Riccardo. - In: JOURNAL OF CARDIOVASCULAR ELECTROPHYSIOLOGY. - ISSN 1540-8167. - 33:12(2022), pp. 2663-2666. [10.1111/jce.15706]
Transient baseline rhythm changes unmasking an uncommon arrhythmic substrate
Foresti, Sara;Cristiano, ErnestoWriting – Original Draft Preparation
;
2022
Abstract
A 15‐year‐old female with recurrent episodes of wide‐QRS tachycardia responsive to intravenous adenosine was referred to our arrhythmia center to undergo an electrophysiological study (EPS). Physical examination, blood tests, chest radiograph, and echocardiogram were all unremarkable. Baseline 12‐lead ECG showed normal sinus rhythm (SR) without evidence of ventricular preexcitation. Before the procedure, continuous 12‐lead ECG recording revealed SR with transient phases of wider‐QRS rhythm (WQR), showing left bundle branch block (LBBB) morphology at a similar heart rate (HR). Based on the presented data what is the most likely underlying mechanism of these electrocardiographic observations?I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
