Right Ventricular Hypertrophy is an increase in the muscular thickness (mass) of the right ventricle (RV). It is a structural cardiac finding that reflects chronic pressure overload, volume overload, or both. It is discussed in cardiovascular anatomy and physiology, and in diseases such as pulmonary hypertension and congenital heart disease. It is most commonly recognized through electrocardiography (ECG) patterns and confirmed with cardiac imaging, especially echocardiography.

Left Ventricular Hypertrophy is an increase in the thickness and/or mass of the left ventricle’s myocardium. It is a structural finding in cardiovascular anatomy and cardiac pathophysiology, not a single disease diagnosis. It is commonly discussed when interpreting an electrocardiogram (ECG) and when reviewing echocardiography or cardiac magnetic resonance imaging (cardiac MRI). It often reflects long-standing hemodynamic stress such as hypertension or valvular heart disease.

Cardiomyopathy is a group of diseases of the heart muscle (myocardium) that change cardiac structure and function. It is a clinical diagnosis used in cardiology, emergency care, internal medicine, and critical care. It commonly presents through symptoms of heart failure, arrhythmia, or unexpected cardiac dysfunction on imaging. It is discussed in the context of anatomy, physiology, pathology, diagnosis, and long-term management.

Cardiomegaly means an enlarged heart. It is a descriptive clinical finding used in cardiology and internal medicine. It most commonly appears in imaging reports (especially chest radiography) and is confirmed or characterized with echocardiography. It can reflect normal adaptation, a structural heart disease, or an imaging limitation.

S4 is the fourth heart sound, an extra low-frequency sound heard in late diastole. It reflects atrial contraction against a stiff or noncompliant ventricle. It is a bedside clinical finding in cardiovascular examination (auscultation). It is most commonly discussed in the assessment of hypertension, cardiomyopathy, and diastolic dysfunction.

S3 is the “third heart sound,” an extra low-frequency sound heard during cardiac auscultation. It occurs in early diastole, shortly after the second heart sound (S2). S3 is a clinical exam finding used in cardiology to assess hemodynamics and ventricular filling. It is commonly discussed in the context of heart failure, volume overload, and cardiomyopathy.

S2 is the **second heart sound** heard on cardiac auscultation. It reflects **closure of the semilunar valves** (aortic and pulmonic valves) at the end of systole. S2 is a **bedside physical exam finding** in cardiovascular physiology and clinical diagnosis. It is commonly used when assessing **murmurs, valvular heart disease, congenital heart disease, and pulmonary hypertension**.

S1 is the first heart sound heard during cardiac auscultation. It is a normal physical-exam finding that marks the start of ventricular systole. S1 is generated mainly by closure of the atrioventricular (AV) valves (mitral and tricuspid). Clinicians use S1 when timing murmurs and assessing valve and conduction physiology.

Heart Sounds are the audible vibrations produced by cardiac mechanical events during the cardiac cycle. They are a core topic in cardiovascular physiology and bedside diagnosis (physical examination). Clinicians use Heart Sounds during auscultation to screen for valve disease, heart failure, and hemodynamic changes. They are commonly assessed with a stethoscope and interpreted alongside vital signs, electrocardiogram (ECG), and echocardiography.

Cardiac Murmur is an extra heart sound caused by turbulent blood flow in or near the heart. It is a clinical finding identified on cardiac auscultation during the physical exam. It commonly relates to cardiac anatomy and physiology, especially heart valves and intracardiac shunts. It is used in general medicine, emergency care, cardiology, pediatrics, and preoperative assessment.