Cardiovascular Disease Glossary
100 terms total — 24 showing — Last updated 15 Sep 2026
Long QT syndrome
A genetic disorder of cardiac ion channels causing prolonged ventricular repolarization and risk of sudden death.
PCI
Acronym for percutaneous coronary intervention, minimally invasive procedure to open blocked coronary arteries.
pericardium
Double-walled sac surrounding the heart that provides protection and reduces friction.
plaque burden
Total amount of atherosclerotic plaque present in coronary arteries, typically measured using intravascular imaging tech...
preload
The degree of ventricular stretch at the end of diastole, determined by venous return and ventricular compliance.
pulmonary edema
Fluid accumulation in the lungs, often due to heart failure or increased pulmonary capillary pressure.
pulmonary hypertension
Elevated pressure in the pulmonary arteries that can lead to right heart failure if untreated.
restenosis
Re-narrowing of a previously treated coronary artery segment, typically occurring after angioplasty or stent placement.
STEMI
ST-elevation myocardial infarction - a severe heart attack with characteristic ECG changes requiring emergency treatment...
stenosis
Abnormal narrowing of a blood vessel or heart valve that restricts blood flow.
stent
A small mesh tube inserted into narrowed arteries to keep them open and maintain blood flow.
syncope
Temporary loss of consciousness due to inadequate cerebral blood flow, commonly called fainting.
SYNTAX score
Angiographic scoring system that quantifies the complexity of coronary artery disease to guide treatment selection betwe...
systolic
Relating to the phase of the heartbeat when the heart muscle contracts and pumps blood.
tachycardia
Abnormally fast heart rate, typically defined as greater than 100 beats per minute in adults.
takotsubo cardiomyopathy
A form of reversible cardiomyopathy triggered by severe emotional or physical stress, characterized by transient dysfunc...
TAVI
Minimally invasive procedure to replace aortic valve without open-heart surgery.
TEE
Ultrasound imaging of the heart performed through a probe placed in the esophagus.
tetralogy of Fallot
A complex congenital heart defect consisting of four anatomical abnormalities that affect blood oxygenation.
thrombus
A blood clot that forms within a blood vessel and remains attached to its site of origin.
TIMI flow grade
Standardized angiographic scoring system (0-3) used to assess coronary blood flow during cardiac catheterization procedu...
troponin
Cardiac biomarker protein released into blood when heart muscle is damaged, used to diagnose heart attacks.
valvuloplasty
Minimally invasive procedure to repair or widen narrowed heart valves.
vascular calcification
Calcium deposit accumulation in arterial walls, indicating advanced atherosclerosis and increased cardiovascular risk.
vasodilator stress testing
Cardiac stress test using medications to dilate coronary arteries instead of exercise.