Dive into a comprehensive lecture on cardiomyopathies, focusing on dilated, hypertrophic, and restrictive types. Explore the causes, pathophysiology, clinical features, diagnosis, and treatment of these heart muscle disorders. Learn about normal cardiac physiology and pathological mechanisms, physical exam findings, and distinctive heart sounds associated with each condition. Gain insights into differentiating constrictive pericarditis from restrictive cardiomyopathy, and understand the various treatment approaches. Conclude with valuable clinical pearls to enhance your understanding of these complex cardiac conditions.