First Heart Sound (Markedly Split) | Auscultation #16 | Lesson with Audio

patient thorax when auscultating by stethoscope

patient position during auscultation
The patient was supine during auscultation.

Description

If the splitting of the first heart sound is large (about 50 milliseconds), it is an indication of an abnormal condition called Right Bundle Branch Block. The splitting is most clearly heard at the tricuspid area. In the mitral valve area, the mitral component is louder. At 50 milliseconds, the splitting of the first heart sound is clearly audible.

Phonocardiogram

Anatomy

First Heart Sound (Markedly Split)


Authors and Sources

Authors and Reviewers

Sources


? v:3 | onAr:0 | onPs:2 | tLb:0 | pv:1
uStat: False | db:0 | cc: | tar: False
| cDbLookup # 0



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