Proximity: In expiration less air is in the lungs moving the heart and great vessels closer to the chest wall and therefore the stethoscope. This makes the murmurs louder and easier to hear.
Answered 6/12/2015
5.8k views
3 doctors weighed in across 3 answers
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question