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Related to S3 gallop: S4 gallop
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When using a non-electronic, cardiology-type stethoscope versus the LittmannA stethoscope 3000 series, cardiologists missed an S3 gallop 40% more often, a Grade 2 aortic regurgitation murmur five times more often and critical care nurses misidentified whether a sound was normal or abnormal two times more often.
Detecting S3 gallops: 191 cardiologists listened to pre-recorded heart sounds with and without an S3 gallop of two different magnitudes, presented in random order and in the presence of ambient noise.