Reverse Wenckebach periods: Five cases of an unstable form of partial auriculoventricular block

Principles governing 2:1 AV block with interference dissociation.

“…Despite these reports, relatively little is known of this arrhythmia which is often mistaken for other arrhythmias. Katz (1946) published several such examples as "almost complete AV block"; and Berman (1955) misinterpreted the condition as a "reverse Wenckebach phenomenon"-a " mechanism" or term that is unacceptable under any circumstances.…”