Coronary Angiogram

A coronary angiogram is a special test that lets doctors see how well your heart’s blood vessels (coronary arteries) are working. It uses contrast dye and X-ray imaging to check for blockages or narrowing that could be affecting blood flow to your heart.

At London Heart Group, we offer expert-led coronary angiograms to diagnose heart conditions quickly and accurately.

What Is a Coronary Angiogram?

A coronary angiogram is a type of cardiac catheterisation. During the test, a thin tube (catheter) is gently guided through a blood vessel in your wrist or groin to your heart. A contrast dye is then injected, which shows up clearly on X-ray images. This allows your cardiologist to:

  • See if any arteries are narrowed or blocked

  • Understand the severity and location of the problem

  • Decide on the best treatment — such as medication, stents, or surgery

Who Might Need a Coronary Angiogram?

You may be referred for a coronary angiogram if you have:

  • Chest pain or angina

  • Shortness of breath, especially during activity

  • Abnormal results from other heart tests (like ECG, stress test, or echocardiogram)

  • Known heart disease that needs closer evaluation

  • A heart attack or suspected heart attack

  • Risk factors like diabetes, high blood pressure, high cholesterol, or a strong family history of heart disease

It’s often used when more detailed information is needed to guide treatment or confirm a diagnosis.

Why Is It Important?

A coronary angiogram is considered the gold standard for detecting coronary artery disease. It helps your doctor:

  • Find the exact location and extent of any narrowing or blockages

  • Determine if you need a stent, bypass surgery, or other intervention

  • Prevent future heart attacks or complications by treating issues early

What Happens During the Procedure?

  • You’ll be awake but given medication to help you relax.

  • A local anaesthetic is used to numb the wrist or groin area.

  • A small catheter is inserted and guided to the heart.

  • Dye is injected and X-ray images are taken in real time.

  • The test usually takes 30 to 60 minutes, and most patients go home the same day.

Is It Safe?

Yes, coronary angiograms are generally very safe. As with any medical procedure, there are small risks, including bleeding or bruising at the entry site, allergic reaction to the dye, or rare complications affecting the heart or blood vessels. Your cardiologist will talk through the risks and answer any concerns you have.

Book Your Coronary Angiogram with London Heart Group

If you’ve been experiencing symptoms or have been advised to have an angiogram, our team of expert cardiologists is here to help.
Call us on 0208 226 5888 or email enquiries@londonheartgroup.co.uk


Early detection saves lives — let’s take care of your heart together.