In cardiac auscultation, at what murmur grade is a thrill first felt?

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Multiple Choice

In cardiac auscultation, at what murmur grade is a thrill first felt?

Explanation:
Thrill appears when a murmur is loud enough to produce a palpable vibration on the chest wall. On the standard murmur scale, you hear grades I through VI, and the transition to a detectable thrill starts at the fourth grade. Before that, grades I–III are heard with the stethoscope but without a palpable thrill. Therefore, the first time you can feel a thrill as you palpate the chest is with a grade four murmur.

Thrill appears when a murmur is loud enough to produce a palpable vibration on the chest wall. On the standard murmur scale, you hear grades I through VI, and the transition to a detectable thrill starts at the fourth grade. Before that, grades I–III are heard with the stethoscope but without a palpable thrill. Therefore, the first time you can feel a thrill as you palpate the chest is with a grade four murmur.

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