Angioplasty
Minimally invasive procedure to widen narrowed blood vessels.
Last updated
Angioplasty is a minimally invasive procedure that opens up narrowed or blocked blood vessels, most often to treat atherosclerosis. A thin tube called a catheter, with a deflated balloon at its tip, is threaded over a guide wire to the blockage. Once in place, the balloon is inflated to a set size, pushing outward against the vessel wall and the surrounding muscle to restore better blood flow. A small mesh tube called a stent is sometimes placed during the inflation to keep the vessel open; afterward, the balloon is deflated and removed.
Coronary angioplasty
The term now covers a wide range of similar procedures done through the skin. Coronary angioplasty treats narrowed coronary arteries in the heart, a condition caused by cholesterol-filled plaques in atherosclerosis. This non-surgical procedure, often called percutaneous coronary intervention, improves blood flow to the heart.
It is used for unstable angina, NSTEMI, STEMI, and spontaneous coronary artery perforation. For stable coronary disease, it can relieve chest pain (angina), improving daily function and quality of life. Peripheral angioplasty opens blood vessels outside the heart, most commonly to treat atherosclerotic narrowings in the abdomen, legs, or kidneys due to peripheral artery disease. It is often combined with a guide wire, peripheral stenting, and atherectomy.
Chronic limb-threatening ischemia
Chronic limb-threatening ischemia—advanced peripheral artery disease causing leg pain (claudication)—can be treated with angioplasty. A study comparing bypass surgery first versus angioplasty first in severe lower limb ischemia found that angioplasty had fewer short-term complications, but bypass surgery had better long-term results. Based on that study, guidelines recommend balloon angioplasty only for patients with a life expectancy of two years or less, or those without a usable vein for bypass.
Renal artery angioplasty
For patients expected to live longer than two years, or who have a suitable vein, bypass surgery is preferred. Renal artery angioplasty treats atherosclerotic blockage of the renal artery, which is linked to high blood pressure and kidney function loss. It may be done with or without stenting. There is a weak recommendation for it in patients with renal artery stenosis who also have flash pulmonary edema or congestive heart failure.
Lore & Background
Angioplasty is used to treat stenotic coronary arteries in coronary heart disease, where cholesterol-laden plaques cause atherosclerosis. Coronary angioplasty is indicated for unstable angina, NSTEMI, STEMI, and spontaneous coronary artery perforation, and for stable coronary disease it relieves angina and improves quality of life. Peripheral angioplasty opens blood vessels outside the coronary arteries, most commonly for atherosclerotic narrowings of the abdomen, leg, and renal arteries caused by peripheral artery disease. For chronic limb-threatening ischemia, angioplasty is associated with less short-term morbidity than bypass surgery, but long-term outcomes favor bypass; guidelines recommend balloon angioplasty only for patients with a life expectancy of two years or less or those without an autogenous vein.
Reader's Guide
Angioplasty represents a cornerstone of modern interventional medicine, offering a lower-risk alternative to surgery for many vascular conditions. Its significance lies in its minimally invasive nature—access is gained percutaneously via the femoral or radial artery, using fluoroscopic guidance and contrast dye to navigate wires and catheters. The procedure has expanded from coronary applications to peripheral, renal, carotid, and venous angioplasty, each with specific indications and limitations. For example, carotid angioplasty with stenting is reserved for patients at high risk for endarterectomy, while renal artery angioplasty has a weak recommendation for those with flash edema or congestive heart failure.
Despite its advantages, angioplasty carries unique risks including embolization, bleeding, hematoma, radiation injury, contrast-induced renal injury, and cerebral hyperperfusion syndrome in carotid cases. Restenosis remains a concern, though drug-eluting balloons and stents reduce this risk, albeit with potential increased mortality for paclitaxel-coated devices in femoropopliteal disease. Adjunctive therapies like rotational atherectomy help treat heavily calcified lesions. The procedure's legacy is one of continuous refinement, balancing efficacy against complications.
Did You Know?
- Angioplasty balloons are inflated to 75 to 500 times normal blood pressure (6 to 20 atmospheres), with most coronary angioplasties requiring less than 10 atmospheres.
- Transradial artery access is the technique of choice for acute coronary syndrome due to significantly lower bleeding and vascular complications compared to transfemoral access.
- Drug-coated balloon angioplasty for venous stenosis affecting dialysis access has better 6-month and 12-month patency than conventional balloon angioplasty.
- Percutaneous transluminal coronary angioplasty is contraindicated if there is less than 70% stenosis of the coronary arteries, as stenosis is not hemodynamically significant below this level.
Also in the Codexery
More in Surgery & Trauma
Sources
Compiled from Wikipedia and the sources listed below. Text from Wikipedia is available under CC BY-SA 4.0; this entry is adapted from it.
- Wikipedia: Angioplasty (CC BY-SA 4.0).
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced