Tear drop heart is seen in
**Core Concept**
A tear drop heart is a radiological sign seen on chest X-rays, indicating a specific type of cardiac enlargement. It is characterized by a pointed or "tear-drop" shaped cardiac silhouette, usually due to right atrial enlargement. This sign is often associated with conditions that lead to increased pressure or volume in the right atrium.
**Why the Correct Answer is Right**
The tear-drop heart sign is typically seen in conditions that cause right heart failure or cor pulmonale, such as pulmonary embolism, pulmonary hypertension, or severe chronic obstructive pulmonary disease (COPD). In these conditions, the right atrium dilates and becomes enlarged, giving it a characteristic pointed shape on chest X-ray. This is due to the increased pressure and volume in the right atrium, which stretches and remodels the atrial wall.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a condition that typically leads to right atrial enlargement and the characteristic tear-drop heart sign.
**Option B:** This option is incorrect because it does not accurately describe the radiological sign of a tear-drop heart.
**Option C:** This option is incorrect because it does not specify a condition that typically leads to right atrial enlargement and the characteristic tear-drop heart sign.
**Clinical Pearl / High-Yield Fact**
The tear-drop heart sign is a classic radiological sign of right heart failure or cor pulmonale, and is often seen in conditions that lead to increased pressure or volume in the right atrium. Remembering this sign can help you diagnose conditions such as pulmonary embolism, pulmonary hypertension, or severe COPD.
**Correct Answer: B. Pulmonary embolism**