Clinique Générale - Beaulieu

tel. +41 22 839 55 00

Clinique des Grangettes

tel. +41 22 305 03 33

Investigations of the heart

Cardiac perfusion SPECT/CT

Preparation
Clothes to wear
For the first part of the examination please wear clothes appropriate to making an effort (sports footwear, loose-fitting clothes, pair of shorts, tracksuit).
Food
The previous evening: a light meal avoiding fat.
The day of the examination: make sure that you do not consume coffee, tea, colas, chocolate, banana or fat (butter, milk, and cheese). You can eat a light breakfast with, for example, a fruit juice or herbal tea with 1-2 slices of bread and some jam.
Medications
Your cardiologist may ask you to interrupt a part of your treatment for this examination. Please follow his/her recommendations. Continue to take the rest of your treatment as usual, without interruption.
Allergies
If you are being treated for an allergic asthma, please notify us.

The process
In principle the examination takes place in 2 sessions. They can be done on one day or on two days. In certain circumstances it is only possible to realise the 1st session.

1st session
Perfusion imaging of your heart at stress (stress test, injection, waiting and imaging: total duration 1 hr). During the examination under the camera please remain immobile.
2nd session
Imaging of the perfusion of your heart at rest (Injection, waiting and imaging: total duration 1 hr). During the examination under the camera please remain motionless.

Between the two sessions (3 hr in the case of examination on 1 day or 24 hr in the case of examination on 2 days), you can resume your treatment for the heart.

Main clinical indications

  • Search for myocardial ischemia (coronary heart disease)

Principle
The perfusion imaging of the myocardium is based on the uptake of a radiopharmaceutical by the muscle cells of the heart, in proportion to the coronary perfusion. The difference in uptake of the cardiac muscle, at stress, which increases its oxygen demand and therefore its perfusion by reflex vasodilation of the coronary vessels, and at rest, makes it possible to unmask the oxygen deficient territories (ischemic), thus revealing the coronary heart disease. Indeed, in the case of narrowing by a calcified plaque (atheroma), the coronary vessel cannot dilate on effort, and the diminished perfusion of its tributary region, is visualised in the form of a reduced activity on the scintigraphy at stress.

Ischemia of the anterior interventricular artery with disorders of the contractility of the anterior wall and a decrease in the ejection fraction on stress.