Key result
Diverse supraventricular bigeminy patterns link to alternating ventricular activation on early beats.
Why the study?
The association of alternating intraventricular conduction with various types of supraventricular bigeminy has rarely been documented.
Case Report (n=5)
May warrant ECG vigilance in supraventricular bigeminy; extends sparse reports but leaves prevalence and significance open.
Several investigators have previously noted that in the presence of bigeminal atrial extrasystoles, the premature beats may exhibit an alternate pattern of ventricular excitation either in the form of alternating left and right bundle-branch block, or alternating right bundle-branch block and normal intraventricular conduction. However, the association of alternating intraventricular conduction with other types of supraventricular bigeminy has rarely been documented. In this report we present five diverse forms of supraventricular bigeminy exhibiting the phenomenon of alternating ventricular excitation on the early beats. Our findings suggest that the exact mechanism of supraventricular bigeminy is irrelevant in terms of subsequent ventricular events. Practically any type of supraventricular bigeminy may result in an alternate pattern of ventricular activation.
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László Littmann (1998) conducted a case report in Supraventricular bigeminy (n=5). Supraventricular bigeminy was evaluated on Alternate pattern of ventricular activation. Diverse forms of supraventricular bigeminy can result in an alternate pattern of ventricular activation on early beats, regardless of the exact mechanism of the bigeminy.
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