**Question:** ST elevation is seen in all of the following conditions except-

A. Myocardial infarction
B. Bundle branch block
C. Pulmonary embolism
D. Ventricular hypertrophy

**Core Concept:**

ST elevation in electrocardiogram (ECG) is a sign of myocardial ischemia or infarction. It represents the elevation of the ST segment due to increased electrical activity in the affected area, particularly in the presence of ischemia or infarction involving the anterior wall of the heart due to the anterior descending branch of the left coronary artery. Myocardial infarction (MI) occurs when there is a sudden blockage in the coronary artery, leading to reduced or no blood flow to the myocardial tissue, causing cell death and resulting in an elevated ST segment.

**Why the Correct Answer is Right:**

D. Ventricular hypertrophy is characterized by the thickening of the ventricular walls due to a compensatory response to increased afterload, such as hypertension. This condition does not involve ischemia or infarction, so ST elevation is not expected.

**Why Each Wrong Option is Incorrect:**

A. Myocardial infarction (MI) typically presents with ST elevation due to ischemia or infarction in the affected myocardial region.
B. Bundle branch block is a type of arrhythmia that results in the blockage of electrical impulse conduction in the heart, but it does not cause ST elevation.
C. Pulmonary embolism is a condition involving blood clots blocking the pulmonary circulation, but it does not directly cause ST elevation in the ECG.

**Clinical Pearl:**

ST elevation in ECG is a key clinical sign of myocardial infarction, indicating the need for urgent evaluation and management. Recognizing these findings can help guide prompt treatment, including reperfusion therapy and preventing further complications. It is essential for medical professionals to accurately interpret ECG findings to diagnose and treat patients effectively.