The auscultation point for the mitral valve is at which interspace and line?

• A. Left 5th interspace midclavicular
• B. Right 5th interspace
• C. Left 2nd interspace
• D. Xiphisternal joint

Answer: (A)

The mitral valve is best heard at the apex of the heart, which corresponds to the left 5th intercostal space along the midclavicular line. This location is where the left ventricle’s apex comes closest to the chest wall, so the auscultatory sounds of the mitral valve (S1, and murmurs like mitral regurgitation or stenosis) are loudest, especially when the patient is in the left lateral decubitus position.

The right 5th interspace isn’t a typical valve listening spot; the aortic valve is best heard at the right 2nd intercostal space, and the left 2nd interspace corresponds to the aortic area rather than the mitral area. The xiphisternal region is not a standard valve auscultation site.