Splitting | S1

The primary goal of splitting S1 is to identify and to localize the site of conduction delay or block during programmed stimulation. It answers the clinical question: Is the delay in AV conduction due to the AV node or the His-Purkinje system?

While a split S2 is often normal (physiologic), a split S1 is usually a sign of an underlying issue, such as a Right Bundle Branch Block (RBBB) . splitting s1

: Advanced algorithms now use intensity, time, and frequency domain features to automatically segment cardiac cycles and identify split sounds. Heart Sounds and Murmurs - UTMB The primary goal of splitting S1 is to