Sinus Bradycardia: Escape-Capture Bigeminy

Report:

Sinus bradycardia 34 - 43/min

Junctional escape beats

Escape-capture bigeminy

Phasic aberrant conduction, RBBB type

Comment:

The mechanism of the bigeminy is sinus bradycardia. Here the effective sinus cycle is the same as the actual one; in other situations, AV block renders the effective cycle longer by multiples (depending on the block) of the sinus cycle.

The captures have slight variations in their “coupling” intervals. Note the reciprocal RP - PR relationship: the earliest P waves have the longest PR intervals – and aberrant conduction.

If you have any suggestions for or feedback on this report, please let us know.