Angiology is the medical specialty focused on diseases of the blood vessels and lymphatic system. It covers three circulatory networks: arteries, veins, and lymphatic vessels. The name comes from the Greek word “angeīon,” meaning vessel. While cardiology centers on the heart itself, angiology picks up where the heart leaves off, dealing with the vast network of vessels that carry blood and lymph throughout the body.
What Angiology Covers
The circulatory system extends far beyond the heart. Arteries carry oxygen-rich blood outward, veins return it, and lymphatic vessels drain fluid and immune cells from tissues. Angiology addresses problems in all three of these systems, from blocked leg arteries to swollen lymph nodes that won’t drain properly.
The most common conditions managed in this specialty include:
- Varicose veins and venous insufficiency: damaged valves in leg veins that cause blood to pool, leading to visible bulging veins, aching, and skin changes
- Aortic aneurysm: a dangerous bulge in the body’s largest artery that can rupture if it grows too large
- Diabetic foot: poor blood flow to the feet combined with nerve damage, raising the risk of ulcers and infection
- Intermittent claudication: cramping leg pain during walking caused by narrowed arteries that can’t deliver enough blood to working muscles
- Lymphedema: persistent swelling, usually in an arm or leg, when the lymphatic system can’t drain fluid properly
- Carotid artery disease: plaque buildup in the neck arteries that supply the brain, a major risk factor for stroke
- Leg ulcers: slow-healing wounds on the lower legs, often caused by chronic vein or artery problems
- Vascular malformations: abnormal tangles of blood vessels that someone is born with
Venous insufficiency and varicose veins are by far the most prevalent of these conditions. They affect a large portion of the adult population and represent a significant share of the day-to-day work in vascular medicine.
How Angiology Differs From Cardiology
Cardiology and angiology both deal with the cardiovascular system, but they focus on different parts. Cardiologists specialize in the heart: its rhythm, its valves, the coronary arteries that feed heart muscle. Angiologists specialize in everything beyond the heart, the peripheral arteries, veins, and lymphatic channels throughout the rest of the body. In practice, the two fields overlap in areas like stroke prevention and atherosclerosis (plaque buildup inside artery walls), since the same disease process can affect both coronary and peripheral arteries.
Angiology vs. Vascular Surgery
The distinction between angiology and vascular surgery is essentially medical management versus surgical intervention. Angiology focuses on investigating vascular diseases, diagnosing them, and treating them with nonsurgical approaches: medications, compression therapy, lifestyle changes, and minor office-based procedures. Vascular surgery handles the cases that need physical repair, from minimally invasive catheter-based procedures to open operations on major blood vessels.
In many European and Latin American healthcare systems, the two are combined into a single specialty called “angiology and vascular surgery,” where the same specialist can offer either a clinical or surgical approach depending on what the patient needs. In the United States, the field is more commonly called “vascular medicine” on the nonsurgical side and “vascular surgery” on the procedural side. Some treatments blur the line. Sclerotherapy for spider veins and small varicose veins, for example, involves injecting a solution that collapses the vein. It’s done in a doctor’s office without anesthesia and doesn’t interrupt normal daily activities, so it sits comfortably in the medical rather than surgical category.
Common Diagnostic Tools
The workhorse of vascular diagnosis is duplex ultrasound, a painless scan performed by placing a probe on the skin’s surface. It combines two types of imaging: one that shows the structure of blood vessels and another that tracks the speed and direction of blood flow in real time. This makes it possible to spot blockages, measure how severe they are, and detect blood clots or leaky valves without any needles or radiation.
Beyond ultrasound, angiologists may use CT or MRI-based angiography to get detailed images of arteries and veins deeper in the body. For smaller vessels, capillaroscopy (examining tiny blood vessels under the skin at the base of the fingernails with a specialized microscope) can reveal early signs of autoimmune or connective tissue diseases that affect circulation. Ankle-brachial index testing, which compares blood pressure at the ankle to blood pressure in the arm, is a quick screening tool for peripheral artery disease in the legs.
The Role in Stroke Prevention
One of the most consequential jobs in angiology is managing carotid artery disease. The carotid arteries run along each side of the neck and supply the brain with blood. When plaque narrows these arteries, pieces can break loose and travel to the brain, causing a stroke. Preventing this requires a layered approach: lifestyle changes, management of blood pressure and cholesterol, and in many cases antiplatelet therapy to keep blood from clotting at the site of damaged artery walls.
For patients who have already had a stroke or mini-stroke linked to arterial disease, dual antiplatelet therapy (two blood-thinning medications at once) provides the greatest benefit in the first few weeks to months. After that early high-risk window, a single antiplatelet medication is generally sufficient for long-term protection. The decision about whether a narrowed carotid artery also needs a procedure, such as a stent or surgical clearing, depends on how severe the narrowing is and whether it’s causing symptoms.
Training and Specialization
The path to practicing vascular medicine varies by country. In the United States, physicians who focus on nonsurgical vascular care typically complete an internal medicine residency followed by additional fellowship training in vascular medicine. Those who pursue vascular surgery can train through an integrated five-year residency or complete a general surgery residency first, then add two years of dedicated vascular surgery training. Both pathways lead to board certification, and both include rotations in vascular medicine, cardiology, and interventional radiology to build a broad skill set.
In European countries, angiology is more commonly recognized as its own distinct specialty within internal medicine. Specialists there may complete a focused training program in angiology that emphasizes nonsurgical diagnosis and management, with vascular surgeons trained separately for operative work. Regardless of the system, the goal is the same: physicians who can evaluate blood vessel problems comprehensively and guide patients toward the right treatment, whether that’s a medication change or a referral for surgery.