Murmur best heard with bell of stethoscope – Medicine MCQ – CVS – Answer
Murmur of which of the following condition is best heard with the bell of the stethoscope? – Correct answer: d) Mitral stenosis
Murmur of mitral stenosis is low pitched and is best heard with the bell of the stethoscope. This murmur is often very localized and needs careful auscultation at the apex, with the subject in left lateral position and in expiration. The bell should be placed gently on the chest. If the bell is pressed too much, it will act like a diaphragm along with the skin underneath, which becomes tightly adherent on the bell. Other low pitched sounds which are best heard with the bell are third and fourth heart sounds.
Regurgitant murmurs mentioned above are high pitched and best heard with the diaphragm of the stethoscope. All these lesions have a high pressure gradient between the proximal and distal chambers producing the high pitched murmur.