What is the diagnosis in this patient who developed chest pain after coughing?
**Core Concept**
The patient's symptoms are suggestive of a condition where a sudden increase in intrathoracic pressure leads to the rupture of a previously asymptomatic aneurysm or dissection of the aorta, resulting in severe chest pain.
**Why the Correct Answer is Right**
The mechanism behind this condition is the sudden increase in intrathoracic pressure during coughing, which can lead to the rupture of an aortic aneurysm or aortic dissection. This is often seen in patients with pre-existing atherosclerotic disease or those with a history of hypertension. The aorta is a major blood vessel that arises from the left ventricle and extends down to the abdominal region, and its wall is composed of three layers: the intima, media, and adventitia. Aortic dissection occurs when there is a tear in the intimal layer, allowing blood to enter the medial layer and causing a separation of the aortic wall.
**Why Each Wrong Option is Incorrect**
**Option A:** This option may be a distractor for conditions like pericarditis or pleurisy, which can cause chest pain, but they are not directly related to increased intrathoracic pressure.
**Option B:** While myocardial infarction can cause chest pain, it is not typically triggered by coughing and is not directly related to increased intrathoracic pressure.
**Option C:** Pulmonary embolism can cause sudden chest pain, but it is not typically triggered by coughing and is not directly related to increased intrathoracic pressure.
**Clinical Pearl / High-Yield Fact**
A sudden increase in intrathoracic pressure can lead to the rupture of a previously asymptomatic aneurysm or dissection of the aorta, resulting in severe chest pain. This is often seen in patients with pre-existing atherosclerotic disease or those with a history of hypertension.
**Correct Answer:** A. Aortic dissection.