44. Cardiomyopathies | Internal Medicine Harrison Based | USMLE Step 2 CK : Dr Maithreyi Govind

📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:-https://t.me/conceptualmedicine009 📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- https://www.instagram.com/conceptual_... 44. Cardiomyopathies | Internal Medicine Harrison Based | USMLE Step 2 CK : Dr Maithreyi Govind Cardiomyopathies are a diverse group of myocardial disorders that result in structural and functional abnormalities of the heart muscle, not explained by coronary artery disease or abnormal loading conditions. On USMLE Step 2 CK, understanding the classification, clinical presentation, diagnostic findings, and management of cardiomyopathies is high yield, particularly in evaluating patients with heart failure, syncope, arrhythmias, or sudden cardiac death. Cardiomyopathies are broadly classified into three major types: • Dilated cardiomyopathy (DCM) – The most common type, characterized by ventricular dilation and systolic dysfunction with reduced ejection fraction (HFrEF). Causes include ischemic heart disease, viral myocarditis, alcohol toxicity, chemotherapy (e.g., doxorubicin), and genetic mutations. Patients present with signs and symptoms of biventricular heart failure, and S3 gallop is often heard. Echocardiography shows dilated chambers and reduced contractility. Management follows standard HFrEF therapy: ACE inhibitors, beta-blockers, diuretics, mineralocorticoid receptor antagonists, SGLT2 inhibitors, and in some cases, ICD or transplant. • Hypertrophic cardiomyopathy (HCM) – A genetic disorder (autosomal dominant) involving mutations in sarcomeric proteins, leading to left ventricular hypertrophy that is often asymmetric and may cause left ventricular outflow tract (LVOT) obstruction. It is a major cause of sudden cardiac death in young athletes. Patients may have dyspnea, chest pain, syncope, and a harsh systolic murmur at the left lower sternal border that increases with Valsalva. Diagnosis is made by echocardiography or cardiac MRI, and treatment includes beta-blockers or non-dihydropyridine calcium channel blockers. ICD placement is indicated in high-risk individuals. • Restrictive cardiomyopathy (RCM) – The least common type, marked by impaired diastolic filling due to rigid, non-compliant ventricles, while systolic function is usually preserved. Common causes include amyloidosis, sarcoidosis, hemochromatosis, and post-radiation fibrosis. Patients present with right-sided heart failure, ascites, edema, and JVD. Echocardiography shows normal-sized ventricles with biatrial enlargement, and tissue biopsy may be required for definitive diagnosis. Treatment is mainly supportive and includes diuretics, management of underlying cause, and in some cases, transplantation. On USMLE Step 2 CK, you must recognize cardiomyopathy types based on history, physical exam, imaging, and ECG findings, and understand the pharmacologic and procedural treatment strategies. Know how to distinguish HCM from aortic stenosis, RCM from constrictive pericarditis, and DCM from ischemic cardiomyopathy using clinical and echocardiographic clues. #Cardiomyopathy #USMLEStep2CK #DilatedCardiomyopathy #HypertrophicCardiomyopathy #RestrictiveCardiomyopathy #HeartFailure #Echocardiography #HFrEF #SuddenCardiacDeath #CardiologyBuzzwords #MedicalEducation #WhiteboardMedicine #USMLEBuzzwords #MCQPrep #ICDPlacement #S3Gallop #ValsalvaMurmur #SarcomereMutation #Step2Review #USMLE2025 #InternalMedicineCore #DiastolicDysfunction #AmyloidosisHeart #LVH #HeartTransplant #BetaBlockers #SGLT2Inhibitors #ConceptualMedicine #MedicalConcepts #NEETPGPrep #FMGE2025 #USMLE2025 #ClinicalMedicine #MBBSConcepts #NextExamPrep #MedSchoolMadeEasy #MedStudentLife #HighYieldMedicine #PathophysiologySimplified #LearnMedicineFast #VisualMedicine #MedicalMnemonics #CrackNEETPG #USMLEStep1Prep #MedEducationRevolution #MBBSShorts #DoctorInTheMaking