How do you tell S1 from S2?
The area of greatest intensity is different (apical for S1 and basilar for S2), and so is the timing (beginning of
the short interval for S1 versus beginning of the long interval for S2). Finally, S1 is lower pitched and longer
than S2, but still high pitched enough to require the diaphragm.
The area of greatest intensity is different (apical for S1 and basilar for S2), and so is the timing (beginning of
the short interval for S1 versus beginning of the long interval for S2). Finally, S1 is lower pitched and longer
than S2, but still high pitched enough to require the diaphragm.