Year: 2026

Left Atrial Appendage Closure is a procedure that seals off the left atrial appendage, a small pouch connected to the left atrium. It is a structural heart intervention used to reduce the risk of clot-related stroke in selected patients, most often those with atrial fibrillation. It is encountered in cardiology alongside decisions about oral anticoagulation, bleeding risk, and stroke prevention. It can be performed using catheter-based devices or surgical/epicardial techniques, depending on the clinical setting.

Pulmonary Vein Isolation is a catheter-based heart rhythm procedure used to treat atrial fibrillation. It is a procedural strategy within electrophysiology (a subspecialty of cardiology). It aims to electrically isolate the pulmonary veins from the left atrium. It is commonly encountered in rhythm-control planning for symptomatic atrial fibrillation.

A Mapping Catheter is a specialized intracardiac catheter used to record electrical signals inside the heart. It is a **device** commonly used during electrophysiology (EP) studies and catheter ablation procedures. It helps clinicians localize arrhythmia sources and define abnormal conduction pathways. It is most often encountered in the evaluation and treatment of supraventricular and ventricular arrhythmias.

Electrophysiology Study is an invasive cardiac procedure that evaluates the heart’s electrical system. It is a diagnostic test and, in many cases, a pathway to treatment (such as catheter ablation). It is commonly encountered in cardiology when assessing arrhythmias (abnormal heart rhythms). It is typically performed in a specialized electrophysiology (EP) laboratory using catheter-based recordings and pacing.

Cardiac Arrhythmogenic Focus is a localized site in the heart that can initiate abnormal electrical impulses. It is a **pathophysiologic concept**, not a single disease, test, or device. It is commonly discussed when explaining **ectopic beats**, **tachycardias**, and targets for **electrophysiology (EP) mapping and catheter ablation**. It is encountered across general cardiology, emergency care, and cardiac electrophysiology.

Cardiac Risk Stratification is the process of estimating a person’s likelihood of having a future cardiovascular event or complication. It is a clinical reasoning approach that combines history, examination, tests, and sometimes formal risk scores. It belongs to the category of clinical assessment frameworks (often supported by scores, biomarkers, and imaging). It is commonly encountered in chest pain evaluation, perioperative assessment, heart failure care, arrhythmia management, and cardiovascular prevention.

Stent Thrombosis is the formation of a blood clot within or immediately adjacent to a coronary stent. It is a cardiovascular condition and a serious complication of percutaneous coronary intervention (PCI). It is most often encountered in the setting of acute coronary syndromes and catheterization laboratory care. Clinically, it can present as a sudden vessel re-occlusion after a stent has been placed.

Restenosis means “narrowing again” after a blood vessel has been opened. It is a clinical condition and a procedure-related complication. It is most commonly discussed after percutaneous coronary intervention (PCI), such as balloon angioplasty or stent placement in coronary arteries. It is encountered when symptoms recur or follow-up testing suggests reduced blood flow through a previously treated vessel.

Graft Occlusion means a bypass graft has become partially or completely blocked. It is a clinical condition and a complication of vascular procedures. It is most commonly discussed after coronary artery bypass grafting (CABG) in cardiology. It can also occur in other surgical or endovascular grafts, but the clinical reasoning is similar.

Coronary Bypass is a surgical procedure that improves blood flow to heart muscle. It is a form of coronary revascularization, most commonly performed as coronary artery bypass grafting (CABG). It is commonly encountered in cardiology when coronary artery disease limits blood supply to the myocardium. It is discussed in contexts such as angina, myocardial infarction risk, and treatment planning with a “heart team.”