Arrhythmogenic Right Ventricular Cardiomyopathy is a heart muscle disease that can trigger abnormal heart rhythms. It most often affects the right ventricle, the chamber that pumps blood to the lungs. In this condition, parts of the heart muscle can be replaced by scar and fatty tissue over time. It is commonly used as a diagnosis when evaluating ventricular arrhythmias, fainting episodes, or a concerning family history.

Restrictive Cardiomyopathy is a type of heart muscle disease where the ventricles become stiff and do not relax normally. It mainly causes “diastolic dysfunction,” meaning the heart has trouble filling with blood between beats. It is commonly discussed in cardiology clinics and hospitals when evaluating unexplained heart failure symptoms with a relatively normal pumping function. It is also a key diagnosis in imaging labs, heart failure programs, and electrophysiology (rhythm) care because it often overlaps with arrhythmias and fluid retention.

Hypertrophic Cardiomyopathy is a heart muscle disease where the muscle becomes abnormally thick. The thickening most often involves the left ventricle, the main pumping chamber. It can affect how the heart fills, pumps, or moves blood out through the aortic valve area. It is commonly discussed in cardiology clinics, imaging labs, and inherited heart disease programs.

Dilated Cardiomyopathy is a heart muscle condition where the main pumping chamber becomes enlarged and weaker. It can reduce the heart’s ability to pump blood forward, leading to symptoms of heart failure. The term is used in cardiology to describe a pattern seen on imaging, most often echocardiography and cardiac MRI. It is also used to guide evaluation for causes, complications, and long-term management planning.

Pulmonary Congestion means extra blood and fluid pressure in the blood vessels of the lungs. It most often reflects elevated pressure on the left side of the heart that “backs up” into the lungs. It is commonly discussed in heart failure, valve disease, and hospital medicine. Clinicians also use the term when interpreting chest imaging and bedside ultrasound.

Cardiorenal Syndrome describes a harmful two-way relationship between the heart and the kidneys. It means heart problems can worsen kidney function, and kidney problems can worsen heart function. It is commonly used in cardiology, nephrology, and hospital medicine when symptoms, labs, and fluid balance overlap. It is a clinical framework, not a single disease or a single test result.

Fluid Overload means the body is holding more water and salt than it can comfortably manage. It can show up as swelling, weight gain, or breathing symptoms when fluid backs up into the lungs. It is commonly discussed in heart failure care, kidney disease, and hospital medicine. Clinicians use the term to describe both a symptom pattern and a physiologic state that affects the heart and blood vessels.

Volume Overload means the body is holding more fluid (water and salt) than the heart and blood vessels can comfortably manage. It often shows up as swelling, shortness of breath, or rapid weight gain from fluid retention. Clinicians use the term when evaluating heart failure, kidney disease, liver disease, and problems with heart valves. It is a physiologic state (a body condition), not a single test or procedure.

Left Heart Failure is a clinical syndrome in which the left side of the heart cannot pump blood forward efficiently. It commonly leads to fluid backing up into the lungs, causing shortness of breath and reduced exercise tolerance. The term is used in cardiology clinics, emergency care, and hospital medicine to describe a pattern of symptoms, exam findings, and test results. It also helps clinicians communicate severity, likely causes, and next steps for evaluation.

Right Heart Failure means the right side of the heart cannot pump blood forward effectively into the lungs. It often leads to fluid backing up in the body’s veins, causing swelling and congestion. Clinicians use the term to describe a specific pattern of heart dysfunction and its symptoms and signs. It is commonly discussed in cardiology, pulmonary hypertension care, critical care, and perioperative medicine.

HFmrEF means **heart failure with mildly reduced ejection fraction**. It describes a type of heart failure where the **left ventricular ejection fraction (LVEF)** is lower than normal, but not severely reduced. HFmrEF is commonly used in cardiology clinics, imaging reports, and heart failure guidelines to help classify heart failure. It helps clinicians communicate a patient’s heart function category and consider evaluation and treatment approaches.

Heart Failure with Mildly Reduced Ejection Fraction is a type of heart failure defined by how strongly the left ventricle pumps. It usually refers to a left ventricular ejection fraction (LVEF) in the mid-range, commonly around 41–49%. It is used in cardiology to classify heart failure and guide evaluation, follow-up, and treatment discussions. It helps clinicians describe people who do not fit neatly into “reduced” or “preserved” ejection fraction groups.

HFpEF stands for **heart failure with preserved ejection fraction**. It is a type of heart failure where the heart’s squeezing strength (ejection fraction) is often normal or near-normal, but filling is impaired. HFpEF is commonly discussed in cardiology clinics, hospitals, imaging labs, and heart failure programs. It is used as a clinical diagnosis and a framework for evaluating symptoms like shortness of breath and fluid retention.

Heart Failure with Preserved Ejection Fraction is a type of heart failure where the heart’s pumping strength is relatively normal. It describes symptoms and signs of heart failure even though the left ventricular ejection fraction is usually 50% or higher. It is commonly used in cardiology clinics, hospitals, and imaging reports to classify heart failure and guide evaluation. It is often discussed when shortness of breath, fluid retention, or exercise intolerance occurs without a “weak pump” on echocardiogram.

HFrEF means **heart failure with reduced ejection fraction**. It describes a type of heart failure where the left ventricle pumps out a lower-than-expected fraction of blood with each beat. Clinicians use HFrEF in cardiology clinics, hospitals, imaging reports, and research studies. It is a shorthand that helps guide evaluation, communication, and general treatment frameworks.

Heart Failure with Reduced Ejection Fraction is a type of heart failure where the heart’s main pumping chamber cannot squeeze as strongly as it should. It is defined using a measurement called ejection fraction, which estimates how much blood the left ventricle pumps out with each beat. It is commonly used in cardiology clinics, emergency care, and hospital medicine to classify heart failure and guide evaluation and treatment planning. It is also used in research studies and clinical guidelines to standardize care and compare outcomes.

Chronic Heart Failure is a long-term condition where the heart cannot pump or fill with blood as effectively as the body needs. It commonly causes symptoms such as shortness of breath, fatigue, or swelling that can persist or recur over time. It is used in clinics, hospitals, and imaging or lab reports to describe a sustained pattern of heart pump dysfunction and its consequences. It also appears in care planning to guide monitoring, testing, and long-term risk discussions.

Acute Heart Failure is a sudden or quickly worsening episode of heart failure symptoms. It means the heart cannot keep up with the body’s needs for blood flow and pressure in the short term. It is commonly used in emergency departments, hospitals, and cardiology services. It can occur in people with known heart failure or as a first-time presentation.

CHF most commonly refers to **congestive heart failure**, a clinical syndrome where the heart cannot pump or fill effectively. It is used in hospitals, clinics, imaging reports, and everyday conversation as a shorthand for **heart failure with fluid congestion**. Clinicians often use “heart failure” as the umbrella term, while CHF emphasizes **symptoms related to fluid buildup**.

Congestive Heart Failure is a clinical syndrome where the heart cannot pump blood effectively enough to meet the body’s needs. It often leads to fluid buildup (“congestion”) in the lungs, legs, abdomen, or other tissues. The term is commonly used in clinics and hospitals to describe a pattern of symptoms, exam findings, and test results.