Upon auscultation at the apex, the APRN hears a grade 3 systolic heart murmur that is soft and blowing in character. What does this finding suggest?

Choice A reason: Aortic stenosis typically produces a harsh, crescendo-decrescendo systolic murmur radiating to the carotids, not a soft blowing murmur at the apex. Choice B reason: Mitral valve regurgitation produces a blowing, holosystolic murmur best heard at the apex and radiating toward the axilla. The grade 3 intensity corresponds to a moderately loud murmur without a palpable thrill. Choice C reason: Tricuspid stenosis produces a diastolic murmur best heard at the lower left sternal border, not a systolic apex murmur. Choice D reason: Austin-Flint murmur is associated with severe aortic regurgitation, producing a mid-to-late diastolic rumble at the apex, not a systolic blowing murmur.