Year: 2026

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.”

Revascularization means restoring blood flow to heart muscle or other tissues that are not getting enough oxygen-rich blood. It is a category of procedure-based treatment, most often performed with catheter-based interventions or surgery. In cardiology, it is commonly encountered in coronary artery disease (CAD), especially angina and acute coronary syndromes (ACS). It is also discussed when planning long-term risk reduction and symptom control in patients with ischemia.

Cardiac Device Clinic is a specialized clinical service that follows people with implanted heart rhythm devices. It belongs to the category of a clinic-based monitoring and management program, not a single test or diagnosis. It is commonly encountered in cardiology after pacemaker or defibrillator implantation and during long-term follow-up. It helps clinicians assess device function, patient symptoms, and rhythm-related risk over time.

Cardiac Lead Placement is the positioning of an electrical “lead” (wire) that connects a cardiac device to the heart. It is a procedure and a device-related concept commonly used in pacing and defibrillator therapy. It is most often encountered with pacemakers, implantable cardioverter-defibrillators (ICDs), and cardiac resynchronization therapy (CRT) systems. It is different from electrocardiogram (ECG) skin lead placement, although both use the word “lead” in cardiology.