Electrophysiology Study is an invasive cardiac diagnostic test that evaluates how electrical signals start and travel through the heart. It is performed in an electrophysiology (EP) lab using catheter-based recordings from inside the heart. It is most commonly used in patients with suspected or known arrhythmias such as supraventricular tachycardia (SVT) or ventricular tachycardia (VT). It can be purely diagnostic or combined with catheter ablation as part of treatment planning.

Cardiac Arrhythmogenic Focus is a term for a localized area of heart tissue that initiates abnormal electrical impulses. It is a physiology and electrophysiology concept used to explain certain cardiac arrhythmias (abnormal heart rhythms). It is commonly discussed when interpreting an electrocardiogram (ECG) and when planning electrophysiology (EP) testing or catheter ablation. It helps clinicians describe “where the rhythm is starting” rather than only describing what the rhythm looks like.

Cardiac Complications are new or worsening heart-related problems that occur during the course of another illness, injury, or medical intervention. They are discussed across cardiology, internal medicine, emergency care, surgery, and critical care. They can involve the myocardium (heart muscle), valves, coronary arteries, pericardium, or the conduction system. The term is commonly used in hospital medicine, perioperative care, and when monitoring high-risk therapies.

Cardiac Morbidity means non-fatal health problems caused by heart disease or cardiac complications. It is an outcomes concept used in cardiology, cardiac surgery, emergency care, and perioperative medicine. It describes the burden of illness after events such as myocardial infarction, heart failure, arrhythmia, or cardiac procedures. It is commonly used in clinical documentation, research endpoints, and quality improvement reporting.

Cardiac Mortality means death that is attributed to a heart-related cause. It is an outcome concept used in clinical cardiology, epidemiology, and clinical trials. It commonly appears in risk stratification, quality metrics, and research endpoints. It is discussed across conditions such as coronary artery disease, heart failure, and arrhythmias.

Heart Healthy Lifestyle is a structured set of daily behaviors that support cardiovascular health and reduce cardiometabolic risk. It is a preventive and therapeutic concept used across cardiology, internal medicine, and primary care. It is commonly discussed in atherosclerotic cardiovascular disease (ASCVD) prevention, hypertension management, and cardiac rehabilitation. It is applied alongside diagnostic testing and medical therapy rather than replacing them.

Cardiac Wellness is an umbrella term for maintaining and improving cardiovascular health across the lifespan. It belongs to preventive cardiology and long-term cardiovascular risk management, rather than a single disease or procedure. It is commonly discussed in primary care, cardiology clinics, cardiac rehabilitation, and perioperative risk assessment. It combines risk-factor assessment, targeted diagnostics, and coordinated lifestyle and medical strategies.

Cardiac Preventive Care is a clinical approach focused on reducing the risk of cardiovascular disease before major events occur. It sits in preventive cardiology and overlaps with internal medicine, primary care, and population health. It includes risk assessment, screening, counseling, and targeted therapies to address modifiable risk factors. It is commonly used in outpatient clinics, perioperative evaluation, cardiac rehabilitation pathways, and longitudinal follow-up.

A Cardiac Screening Program is an organized approach to detect cardiovascular disease or risk before symptoms occur. It sits in the clinical domain of prevention and diagnostic testing. It commonly uses history, physical examination, and tests such as electrocardiography (ECG) and echocardiography. It is used in primary care, sports medicine, pre-operative assessment, occupational health, and cardiology clinics.

U Wave is a small deflection on the electrocardiogram (ECG) that can appear after the T wave. It is an ECG finding in the domain of cardiac electrophysiology and ventricular repolarization. It is most commonly discussed during ECG interpretation in electrolyte disorders, bradycardia, and drug effects. It is also relevant when assessing repolarization abnormalities and arrhythmia risk in selected contexts.