percutaneous coronary intervention
Imagine a clogged drainpipe that you can clear without tearing open the wall — you thread a thin tool in through an existing opening and work from inside. Percutaneous coronary intervention, or PCI, does this for the heart: a doctor opens a narrowed coronary artery from inside the vessel, without opening the chest. “Percutaneous” simply means “through the skin.”
The cardiologist inserts a long, thin tube called a catheter into an artery in the wrist or groin and guides it, under X-ray, up to the heart and into the blocked coronary artery. A tiny balloon is inflated to widen the narrowing (angioplasty), and in almost all cases a small metal mesh tube — a stent — is left behind to keep the artery propped open. Modern stents usually release a drug that helps prevent the artery from re-narrowing.
PCI is the cornerstone treatment for a heart attack caused by an abruptly blocked artery, where opening the vessel quickly saves heart muscle. It is also used for stable angina to relieve symptoms. It does not cure the underlying atherosclerosis, however: medicines, lifestyle change, and ongoing care remain essential, and arteries can narrow again or new blockages can form elsewhere.
A patient arrives with a STEMI; the on-call team performs emergency PCI, finding a fully blocked LAD that is opened with a balloon and stented within 90 minutes of arrival.
“Door-to-balloon” time — how fast PCI opens the artery — is a key quality measure in heart attack care.
PCI and CABG (bypass surgery) are the two main ways to restore blood flow in coronary disease. The choice depends on how many vessels are involved, their location, the patient’s diabetes status and overall risk — a decision often made jointly by cardiologists and surgeons.