Capture beat
Let’s talk about capture beat.
Capture beat occurs when a sinus impulse conducts through the AV node and depolarizes the ventricle (captures the ventricles) producing a QRS complex with normal duration between wide QRS complexes in the setting of AV dissociation. As a result, the R‐R interval between the preceding VT beat and the QRS of the capture beat tends to be shorter than the R‐R intervals of the VT. The QRS complex of capture beats may appear similar to the QRS complexes observed during sinus rhythm.
Its important to note that capture beats are a hallmark of ventricular tachycardia.
The fifth complex is a capture beat (sinus P wave conducted with normal QRS) in the setting of accelerated idioventricular rhythm.
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