The Mitral Valve is a cardiac valve that controls blood flow between the left atrium and the left ventricle. It is an anatomic structure with essential physiologic roles during the cardiac cycle. It is commonly discussed in cardiology when evaluating murmurs, heart failure, and atrial fibrillation. It is frequently assessed with echocardiography and is a target for medical, interventional, and surgical management.

The Interventricular Septum is the thick wall of heart muscle that separates the left ventricle from the right ventricle. It is a core concept in cardiac anatomy and cardiovascular physiology. Clinically, it is discussed in echocardiography, electrocardiography (ECG), cardiac magnetic resonance (CMR), and cardiac surgery. It is central to understanding conditions like ventricular septal defect and hypertrophic cardiomyopathy.

The Right Ventricle is the cardiac chamber that pumps venous blood into the pulmonary circulation. It is an anatomic and physiologic concept central to cardiology, critical care, and cardiothoracic surgery. It is commonly assessed during physical examination, echocardiography, cardiac magnetic resonance imaging (CMR), and right-heart catheterization. Its function often influences diagnosis, risk stratification, and management in pulmonary and cardiovascular disease.

The Left Ventricle is the main pumping chamber on the left side of the heart. It generates the pressure needed to deliver oxygenated blood to the body through the aorta. It is a core topic in cardiac anatomy, physiology, and cardiovascular disease assessment. It is commonly referenced in echocardiography reports, heart failure care, and perioperative decision-making.

The Right Atrium is one of the four chambers of the heart. It receives deoxygenated blood from the body and delivers it to the right ventricle through the tricuspid valve. It is primarily an anatomic and physiologic concept with major relevance to cardiology, critical care, and cardiac imaging. It is commonly discussed in echocardiography, electrocardiography (ECG), and right-sided hemodynamic assessment.

The Left Atrium is one of the four chambers of the heart and sits posteriorly in the cardiac anatomy. It receives oxygenated blood from the pulmonary veins and passes it to the left ventricle through the mitral valve. It is discussed in cardiovascular physiology, echocardiography interpretation, and structural heart disease. It is commonly referenced in atrial fibrillation care, valvular disease assessment, and heart failure evaluation.

Ventricles are the two lower chambers of the heart that pump blood out to the lungs and the body. They are core cardiac anatomy and physiology terms used across cardiology, emergency care, and cardiac surgery. Clinical discussions about Ventricles commonly involve pumping function, pressures, and chamber size. They are assessed with bedside examination and tests such as electrocardiography (ECG) and echocardiography.

Atria are the two upper chambers of the heart: the right atrium and the left atrium. They receive blood returning to the heart and help move it into the ventricles. Atria are a core concept in cardiac anatomy and physiology and in understanding arrhythmias and valvular disease. They are commonly discussed in electrocardiography (ECG), echocardiography, and cardiology decision-making.

Epicardium is the outermost layer of the heart wall. It is also called the visceral pericardium, forming the inner layer of the pericardial sac. Epicardium is a core concept in cardiac anatomy, imaging, surgery, and electrophysiology. It is commonly discussed in pericardial disease, coronary artery anatomy, and epicardial procedures.

Pericardium is the double-layered sac that surrounds the heart and the roots of the great vessels. It is a core topic in cardiac anatomy and cardiovascular pathophysiology. It is commonly discussed in pericarditis, pericardial effusion, and cardiac tamponade. It is assessed most often with bedside examination and echocardiography.