Bigeminal sandwiches galore

摘要

A long run of s “sandwiched” in between the sinus beats resulting in an almost doubling of the heart rate—interpolated s in bigeminy—is described. This case illustrates three interesting aspects of interpolated s. Although they are not uncommon, long runs of interpolated s in bigeminy are rare findings. In this case, the arrhythmia had a duration of 3 minutes. Second, it illustrates the “age‐old wisdom” of partial retrograde conduction. Also, even though the arrhythmia resulted in an almost doubling of the heart rate, the patient remained asymptomatic.