**Question:** Signe-de-Dance is

A. Signe de Gand
B. Signe de Bruit
C. Signe de Morgagni
D. Signe de Rosales

**Core Concept:**

Signe-de-Dance (or Dancing Sign) is a clinical sign used in the diagnosis of certain cardiovascular disorders. It refers to the rhythmic, alternating systolic murmur heard during auscultation. This murmur is caused by the dynamic interaction of the valvular apparatus and the blood flow.

**Why the Correct Answer is Right:**

The correct answer is **B. Signe de Bruit**. This is because Signe-de-Dance is a term used to describe the characteristic rhythm of a heart murmur. In the case of a murmur being a **Bruit** (French for murmur), the murmur is caused by turbulent blood flow due to abnormalities in the heart valves or great vessels. This rhythmic, alternating murmur is heard during systole and serves as a clue to diagnose certain cardiovascular disorders, such as pulmonic stenosis or coarctation of the aorta.

**Why Each Wrong Option is Incorrect:**

A. **Signe de Gand** is another term for a heart murmur, but it specifically refers to a continuous murmur heard throughout the cardiac cycle, not a rhythmic alternating murmur like Signe-de-Dance.

C. **Signe de Morgagni** is a term related to mediastinal widening or displacement of the cardiac silhouette on chest X-ray, not a murmur or clinical sign related to cardiovascular disorders.

D. **Signe de Rosales** is a term related to the widening of the mediastinum and cardiac silhouette on chest X-ray, not a murmur or clinical sign related to cardiovascular disorders.

**Clinical Pearl:**

Understanding Signe-de-Dance is crucial for medical students and practicing physicians, as it helps in recognizing cardiovascular disorders during physical examination and referrals to further diagnostic tests (echocardiography) for proper diagnosis and management of the patient.