A harsh systolic murmur best heard at the right second intercostal space with radiation to the carotids is most consistent with which condition?

Study for the PANCE Cardiology Test. Enhance your knowledge with comprehensive flashcards and multiple-choice questions. Each question comes with hints and detailed explanations. Prepare thoroughly for your exam!

Multiple Choice

A harsh systolic murmur best heard at the right second intercostal space with radiation to the carotids is most consistent with which condition?

The main idea here is recognizing where a systolic murmur originates and how it radiates. A harsh, crescendo–decrescendo systolic murmur best heard at the right second intercostal space (the aortic area) that radiates to the carotids points to narrowing of the aortic valve. The right upper sternal border corresponds to the aortic valve as the jet of blood is ejected into the aorta; the flow across the stenotic valve creates turbulent flow that travels into the aorta and then the carotid arteries, producing that characteristic radiation. This pattern reflects increased left ventricular afterload from the stenotic valve, often due to calcific degeneration with aging or a bicuspid valve in younger patients. You may also notice a delayed upstroke of the carotid pulse and a single or soft S2, consistent with aortic stenosis progression. Other murmurs don’t fit this pattern: a mitral regurgitation murmur is holosystolic and best heard at the apex with radiation to the axilla; a tricuspid regurgitation murmur is holosystolic at the left lower sternal border and can radiate toward the right sternum, not to the carotids; pulmonic stenosis is a systolic murmur best heard at the left upper sternal border and typically does not radiate to the carotids; aortic regurgitation is diastolic, not systolic.

The main idea here is recognizing where a systolic murmur originates and how it radiates. A harsh, crescendo–decrescendo systolic murmur best heard at the right second intercostal space (the aortic area) that radiates to the carotids points to narrowing of the aortic valve. The right upper sternal border corresponds to the aortic valve as the jet of blood is ejected into the aorta; the flow across the stenotic valve creates turbulent flow that travels into the aorta and then the carotid arteries, producing that characteristic radiation.

This pattern reflects increased left ventricular afterload from the stenotic valve, often due to calcific degeneration with aging or a bicuspid valve in younger patients. You may also notice a delayed upstroke of the carotid pulse and a single or soft S2, consistent with aortic stenosis progression.

Other murmurs don’t fit this pattern: a mitral regurgitation murmur is holosystolic and best heard at the apex with radiation to the axilla; a tricuspid regurgitation murmur is holosystolic at the left lower sternal border and can radiate toward the right sternum, not to the carotids; pulmonic stenosis is a systolic murmur best heard at the left upper sternal border and typically does not radiate to the carotids; aortic regurgitation is diastolic, not systolic.

More practice questions