High-Definition Intravascular Ultrasound (HD IVUS)

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High-Definition Intravascular Ultrasound (HD IVUS)
With Advanced Co-Registration Technology

By combining HD IVUS with co-registration, we provide more precise, personalised and confident heart treatment because your heart deserves the best care possible.

At Sunway Medical Centre Ipoh, we are committed to delivering precision-driven heart care. Our catheterisation laboratory is now equipped with High-Definition Intravascular Ultrasound (HD IVUS) with co-registration capability an advanced imaging technology that enhances accuracy during coronary interventions.

This innovation allows our cardiologists to see beyond conventional angiography and make more confident, data-guided decisions for optimal patient outcomes.

What is HD IVUS?

High-Definition Intravascular Ultrasound (HD IVUS) is a specialised imaging tool used during coronary angioplasty and stenting procedures. A miniature ultrasound probe is inserted into the coronary artery to provide real-time, high-resolution images from inside the blood vessel.

Unlike a regular angiogram, which shows the artery outline using dye, HD IVUS shows:

  • The exact size of your artery
  • The amount and type of plaque buildup
  • How severe the blockage is
  • Whether a stent is fully expanded and properly placed

This level of clarity supports more precise treatment planning and optimisation.

What is Co-Registration?

Co-registration is a special feature that matches the ultrasound images with the live X-ray (angiogram) during the procedure.

This means your doctor can:

  • See exactly where the blockage is
  • Measure it more accurately
  • Place the stent in the precise location needed

It is eliminating guesswork and improves confidence during treatment.

Why Choose HD IVUS?

Greater Accuracy

More detailed imaging helps ensure appropriate stent sizing and optimal placement.

Therapy is tailored based on the actual vessel anatomy not just external imaging.

Enhanced visualisation reduces the risk of incomplete stent expansion or missed disease.

Studies show IVUS-guided procedures are associated with well-placed and well-expanded stents are linked to improved recovery and outcomes.

Preparing for Your HD IVUS Procedure

(High-Definition Intravascular Ultrasound)

HD IVUS is performed during a coronary angiogram or angioplasty procedure to provide detailed images from inside your heart arteries. Proper preparation helps ensure a smooth and safe experience.

Before Your Procedure

Fasting

  • You will usually be asked not to eat or drink for 6 – 8 hours before the procedure.
  • Small sips of water may be allowed for medications (confirm with your doctor).

Medications

Inform your doctor about all medications and supplements you are taking. You may be advised to:

  • Continue blood pressure medications
  • Adjust diabetes medication (especially insulin)
  • Continue or temporarily stop certain blood thinners (based on your condition)

*Do not stop any medication unless advised by your doctor.

Medical Conditions

Please inform your healthcare team if you:

  • Have allergies (especially to contrast dye or iodine)
  • Have kidney problems
  • Have asthma
  • Are pregnant or might be pregnant

Blood Tests & Assessment

Before the procedure, you may undergo:

  • Blood tests (including kidney function)
  • ECG (heart tracing)
  • Clinical review by your cardiologist

What to Bring

  • Identification documents
  • List of medications
  • Previous medical reports (if applicable)

*You will be asked to change into a hospital gown before the procedure.

During the Procedure

  • An IV line will be inserted into your arm.
  • The procedure is usually performed under local anaesthesia (you will be awake but comfortable).
  • Mild sedation may be given to help you relax.

The cardiologist will insert a small tube through the wrist or groin artery to reach your heart. The HD IVUS catheter is then used to obtain detailed images from inside your artery.

After the Procedure

Recovery

  • You will be monitored in a recovery area for several hours.
  • If the wrist was used, recovery is usually quicker.
  • If the groin was used, you may need to lie flat for a few hours.

Going Home

  • Some patients go home the same day.
  • Others may stay overnight for observation, especially if a stent was placed.

At Home

  • Avoid heavy lifting for a few days.
  • Drink plenty of fluids to flush out the contrast dye.
  • Follow medication instructions carefully, especially if a stent was inserted.

Seek immediate medical attention if you notice:

  • Persistent bleeding or swelling at the insertion site
  • Chest pain
  • Shortness of breath

Our experienced cardiology team will guide you through every step to ensure your procedure is safe, comfortable and carefully monitored.

Frequently Asked Questions (FAQ)

HD IVUS is a tiny ultrasound device attached to a thin tube. It is gently inserted into your heart artery during an angiogram or stent procedure. It allows the doctor to see detailed images from inside the artery.
A standard angiogram shows the outline of the artery using dye and X-ray. HD IVUS goes one step further — it shows what is happening inside the artery wall, including plaque build-up and the true size of the vessel.
No. It is performed during your angiogram or angioplasty. It does not require a separate surgery.
Most patients feel little to no pain. You will receive local anaesthesia to numb the area (usually wrist or groin). You may feel mild pressure but not sharp pain.
Yes. HD IVUS is widely used in heart procedures and is considered safe. Your cardiologist will recommend it only if it benefits your treatment.
It helps your doctor:
  • Measure your artery more accurately
  • Choose the right stent size
  • Ensure the stent is fully expanded
  • Reduce the risk of future complications
Better visibility means more precise treatment.
The entire angiogram or stent procedure usually takes 30–60 minutes, depending on complexity. Using HD IVUS only adds a short amount of time.
Some patients go home the same day. Others may stay overnight, especially if a stent is placed. Your doctor will advise you.
As with any heart procedure, there are small risks such as bleeding, bruising, or reaction to contrast dye. Serious complications are rare. Your medical team monitors you closely throughout.
Most patients resume light activities within a few days. Avoid heavy lifting for about a week, or as advised by your doctor.

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