Angiogram vs Angiography: The Simple Difference Everyone Gets Wrong

Angiogram vs Angiography: The Simple Difference Everyone Gets Wrong

Whenever a cardiologist suggests an imaging procedure to assess the heart or blood vessels, the patient will likely encounter the terms 'angiogram' and/or 'angiography,' which are sometimes used interchangeably. They are similar, but they are not the same. This kind of confusion exists even among people who have previously undergone any cardiovascular examination.

Knowing the difference between an angiogram and angiography helps patients better understand the diagnosis and treatment. Although the two terms relate to the examination of the blood vessels, one pertains to the imaging procedure while the other pertains to the images produced.
 

Understanding Blood Vessel Imaging

The heart and blood vessels supply oxygen-rich blood throughout the body. When blood vessels become hardened or blocked by deposits of fat (atherosclerosis), the reduced blood supply can cause chest pain, a heart attack, stroke, or peripheral arterial disease.

To diagnose such conditions, doctors use specialised imaging methods that allow them to see the blood vessels at work. Here comes the importance of angiography and angiograms.
 

What Is Angiography?

It is an imaging technique used to examine the interior of blood vessels.

In conventional angiography, a contrast dye is injected through a catheter placed in an artery (usually the wrist or groin), allowing X-ray images of the blood vessels to be captured.

The test enables physicians to assess the following:

• Coronary artery disease

• Blocked or narrowed arteries

• Blood clots

• Aneurysms

• Blood vessel abnormalities present at birth

• Decreased blood flow to tissues

Angiography is regarded as the "gold standard" of tests used for the diagnosis of such vascular problems.
 

What Is an Angiogram?

An angiogram is the image produced during an angiography procedure. The X-ray images are taken after a contrast dye is introduced into the bloodstream to evaluate blood circulation and detect any defects, such as narrowed or clogged arteries.

In simple terms:

• Angiography is the imaging test used.

• An angiogram is the image obtained from that procedure.

Although the terms are often used interchangeably in clinical practice, there is a technical difference between angiogram and angiography.
 

Angiogram vs Angiography: Key Differences

Awareness of this distinction will definitely make medical consultations much easier.

When Do Doctors Recommend Angiography?

Angiography is recommended when there is suspicion of reduced blood supply or arterial problems. Some examples are listed below:

Chest Pain

Recurrent chest pain may be associated with narrowing of the coronary arteries that supply the heart.

Suspected Heart Attack

Angiography of the coronary arteries allows the diagnosis of the arteries which were blocked during the heart attack.

Abnormal Stress Test

When the stress test results reveal the problems with blood flow to the heart muscles, the doctors use angiography.

Peripheral Artery Disease

Angiography is recommended to diagnose problems related to pain during walking or poor blood flow to the legs.

Stroke Evaluation

To diagnose narrowing or blockages in the brain's arteries, doctors perform angiography.

Aneurysm Assessment

Angiography allows seeing balloon-like enlargements in the blood vessels.

How Is Angiography Performed?

The procedure is usually carried out in a specialised catheterisation laboratory (cath lab).

The typical steps include:

Preparation

Patients may be advised to avoid eating or light diet for several hours before the procedure. Blood tests and kidney function tests are often performed beforehand because contrast dye is eliminated through the kidneys.

Local Anesthesia

The area where the catheter is to be inserted is made numb by local anaesthesia.

Insertion of Catheter

This step involves inserting the catheter into an artery that opens into the heart or another blood vessel.

Injection of Contrast Dye

Contrast dye is injected into the arteries using a catheter.

Imaging

A series of quick X-ray images is taken as the contrast dye passes through the arteries. These images are the angiogram.

Completion

Once imaging is complete, the catheter is removed, and pressure or a closure device is applied to prevent bleeding.

Most diagnostic angiography procedures are completed within 15-20 minutes.

What Can an Angiogram Reveal?

An angiogram helps to determine how healthy the blood vessels are. It can reveal:

• Partially blocked arteries

• Completely blocked arteries

• Coronary artery disease

• Blood clots

• Aneurysms

• Vascular malformations

• Poor blood circulation

• Improperly formed blood vessels

This will help the cardiologist know whether treatment using medications only will work or if there will be a need for other interventions like angioplasty and bypass surgery.

Is Angiography Painful?

For most people, angiography is not painful. As local anaesthesia is used, introducing a catheter does not hurt. The patient may feel:

• Some pressure at the point of catheter insertion

• Warm feeling while the contrast agent is administered

• Flushing

Extreme pain is rather rare during this procedure. Minor pain and bruising at the catheter entry point may continue for several days after the procedure.

Are There Any Risks?

The angiography procedure itself is safe when performed by qualified experts. But like any procedure that involves invasion of the body, there are always some inherent risks.

They are as follows:

• Bleeding from the insertion site of the catheter

• Bruising

• Infection

• Allergy to the dye material

• Kidney damage (temporarily)

• Irregular heartbeat

• Injury to the artery

• Heart attack or stroke (rarely)

Your medical professionals review your medical records to eliminate these risks before the test.

What Happens After Angiography?

Recovery depends on the access site and the patient's overall condition. The post-procedure care includes:

• Monitoring the patient for some time.

• Taking the patient’s BP and pulse rate at regular intervals

• Adequate fluid intake helps eliminate contrast media from the kidneys.

• Avoid heavy work and vigorous exercises for a few days.

Most patients may resume normal daily activities within one to two days unless additional treatment has been performed. In case the angiography reveals a severe blockage, the doctors will perform the coronary angioplasty and stenting in one session.

Conclusion

The confusion between angiogram vs angiography arises since both terms are interchangeable. However, the difference between them is clear: angiography is the procedure used to examine blood vessels, while an angiogram is the image obtained from it.

With this information at hand, a patient will have no trouble understanding the diagnosis and communicating with the doctor. Since angiography allows visualisation of blood vessels and blood flow, this examination plays a critical role in the diagnosis of cardiovascular diseases.

Frequently Asked Questions

Does angiography always lead to angioplasty?

No. Angiography is a diagnostic procedure. Angioplasty is performed only if a significant blockage is found in a large or major arterysupplying blood to a large area of the heart.

Which is more accurate, CT angiography or conventional angiography?

Conventional angiography is considered the gold standard for the diagnosis of coronary artery disease and can offer immediate treatment if required.

How long does angiography take?

Angiography generally takes 15-20 minutes, not including preparation and recovery times.

Can I go home the same day?

Yes. Most patients undergoing diagnostic angiography are discharged the same day unless additional treatment is required.

Is angiography safe for older adults?

Yes. It is generally safe if the patient's overall health and renal function have been evaluated first.