Question

Sound heard at the right of the sternum at the second intercostal space is the closure of pulmonic valves.

Options:
a) True
b) False

Answer 1

Sound heard at the right of the sternum at the second intercostal space is the closure of pulmonic valves is False.

Step-by-step explanation:

The statement suggesting that the sound heard at the right of the sternum at the second intercostal space is the closure of pulmonic valves is inaccurate. In reality, the closure of the pulmonic valves generates the second heart sound (S2), which is typically heard best at the left sternal border at the second intercostal space, not the right. The pulmonic valve closure occurs when the right ventricle contracts, ejecting blood into the pulmonary artery, causing the valve to close, resulting in the second heart sound. The location for the pulmonic valve's sound projection is consistent with the left side of the sternum rather than the right.

Understanding the anatomical positioning of the heart valves aids in the identification of specific heart sounds. The closure of the aortic valve is associated with the second heart sound (S2) heard at the right sternal border at the second intercostal space. This sound coincides with the end of systole when the aortic valve closes as the left ventricle finishes contracting, preventing blood from flowing back into the left ventricle. Therefore, the sound heard at the right of the sternum at the second intercostal space corresponds to the closure of the aortic valve (A2), not the pulmonic valve.

In clinical practice, accurate identification of heart sounds and their respective locations assists healthcare professionals in diagnosing cardiac conditions. Recognizing the specific timing and placement of these sounds is crucial for differentiating between normal and abnormal cardiac function, aiding in the diagnosis and management of various cardiovascular disorders.

Answer 2

The statement is true; the sound heard at the right sternum at the second intercostal space indeed corresponds to the closure of the pulmonic valves, which is part of the second heart sound, S2, or the 'dub' sound.

Step-by-step explanation:

The statement that the sound heard at the right of the sternum at the second intercostal space is the closure of pulmonic valves is true. In a normal, healthy heart, the second heart sound, S2, is the sound of the closing of the semilunar valves (which include the pulmonic valves) during ventricular diastole and is described as a "dub." This sound is best heard at the second intercostal space to the left of the sternum for the aortic valve and to the right for the pulmonic valve. Since we're focusing on the right side in the question, it corresponds to the pulmonic valve. This auscultation point allows healthcare providers to assess the function of the pulmonic valve and detect any abnormalities.