Cardiomyopathies

Introduction

Cardiomyopathies are a group of diseases that primarily affect the myocardium, leading to mechanical and/or electrical dysfunction of the heart. These conditions can result in heart failure, arrhythmias, or sudden cardiac death. For USMLE Step 1, a solid understanding of the pathophysiology, clinical features, diagnostic criteria, and management of various cardiomyopathies is crucial. This guide provides an in-depth review, covering key concepts that are vital for success on the exam.

Classification of Cardiomyopathies

Cardiomyopathies are broadly classified into the following types:

1. Dilated Cardiomyopathy (DCM)

2. Hypertrophic Cardiomyopathy (HCM)

3. Restrictive Cardiomyopathy (RCM)

4. Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC)

5. Unclassified Cardiomyopathies