Harvey has a heart murmur in his left ventricle that produces a loud 'gurgling' sound at the beginning of systole. Which valve is probably faulty?

검증된 단계별 안내

Understand the phases of the cardiac cycle: systole is the phase when the ventricles contract to pump blood out of the heart.

Identify which valves are involved in the left ventricle during systole: the aortic valve opens to allow blood to flow into the aorta, and the mitral valve closes to prevent backflow into the left atrium.

Recognize that a murmur occurring at the beginning of systole suggests a problem with a valve that should be closing or opening at that time.

Since the murmur is described as a 'gurgling' sound in the left ventricle at the start of systole, consider that the mitral valve might be faulty, possibly leaking (mitral regurgitation) as it should be closed during ventricular contraction.

Conclude that the faulty valve is likely the mitral valve, as it is the valve between the left atrium and left ventricle responsible for preventing backflow during systole.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Heart Valves and Their Locations

The heart has four main valves: mitral and tricuspid (atrioventricular valves) and aortic and pulmonary (semilunar valves). The mitral valve is located between the left atrium and left ventricle, controlling blood flow into the left ventricle during diastole.

Systole and Valve Function

Systole is the phase of the cardiac cycle when the ventricles contract to pump blood out. During systole, the atrioventricular valves (mitral and tricuspid) should be closed to prevent backflow, while the semilunar valves open to allow blood ejection.

Heart Murmurs and Valve Dysfunction

Heart murmurs are abnormal sounds caused by turbulent blood flow, often due to valve defects. A loud 'gurgling' sound at the start of systole in the left ventricle suggests mitral valve regurgitation, where the valve leaks and allows blood to flow backward into the left atrium.