30/09/2026
What causes a blocked artery?
A blocked artery usually doesn’t happen overnight.
For coronary arteries, one of the most common causes is plaque building up within the artery wall — a process known as atherosclerosis.
Plaque can contain cholesterol, fat and other substances. Over time, it can cause the artery to become narrower and stiffer, reducing blood flow to the heart.
But not every coronary artery blockage is caused by plaque. Other conditions can affect the coronary arteries, including spontaneous coronary artery dissection (SCAD), where a tear develops within the artery wall, as well as coronary artery spasm and other less common conditions.
A number of factors can contribute to coronary artery disease, including blood pressure, cholesterol, diabetes, smoking, physical inactivity, diet, age and family history.
Some of these risk factors can be changed, while others can’t.
That’s why looking after your cardiovascular health isn’t just about what happens after a diagnosis. Prevention matters too.
Exercise, alongside other lifestyle and medical strategies, can play an important role in supporting cardiovascular health and managing cardiovascular risk.
Heart health starts long before a cardiac event.