**Question:** Pappu, a 49-year male complained of sudden onset of palpitation and apprehension. He is sweating for last 10 minutes and fears of impending death. Diagnosis is -

A. Anxiety
B. Depression
C. Hypertension
D. Acute Coronary Syndrome

**Core Concept:**
In this multiple-choice question, we are testing the differential diagnosis of a patient presenting with sudden onset palpitation, apprehension, and excessive sweating. The patient also fears impending death, which could be related to the severity of symptoms. Understanding the differentials is crucial in providing appropriate treatment and management to the patient.

**Why the Correct Answer is Right:**

D. Acute Coronary Syndrome (ACS) is the correct answer. ACS is a group of symptoms and signs that occur when blood flow to the heart muscle is reduced or blocked, leading to myocardial ischemia and possible infarction (heart attack). In ACS, the patient presents with chest pain, usually radiating to the left arm, back, or jaw, which is often described as crushing, squeezing, or oppressive in nature. The patient's features in this question are more consistent with anxiety, depression, hypertension, and ACS.

**Why Each Wrong Option is Incorrect:**

A. Anxiety and B. Depression are psychological disorders and do not typically present with the severe symptoms described. While anxiety and depression may coexist with ACS, they are not the primary cause of the symptoms presented.

C. Hypertension is a risk factor for ACS and may present with some of the symptoms mentioned, but hypertension itself does not cause the described severe symptoms.

**Core Concept:**

Understanding the core concepts of ACS, anxiety, depression, hypertension, and their clinical presentations is essential for accurate diagnosis and management of patients presenting with severe symptoms.

**Clinical Pearl:**

In cases where a patient presents with severe symptoms like those described, it is essential to consider cardiovascular diseases like ACS along with psychological disorders and hypertension. Timely and accurate diagnosis is crucial for effective treatment and patient care.