perfusion scan


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perfusion scan

perfusion scan

Perfusion scintigraphy Cardiology A radionuclide technique for assessing myocardial or pulmonary blood flow, measured by IV injection of 99mTc microaggregated albumin, or thallium, TC-MIBI. See Myocardial infarction. Cf Ventilation scan.

perfusion

1. the act of pouring through or over; especially the passage of a fluid through the vessels of a specific organ.
2. a liquid poured through or over an organ or tissue.

perfusion pressure
the gradient between arterial blood pressure and venous pressure in a comparable location in the vascular tree.
pulmonary perfusion
blood flow through the pulmonary capillaries.
renal perfusion
the rate of perfusion in the kidney is much higher than in any other organ. The rate of formation of urine depends to a large extent on the perfusion rate.
perfusion scan
using pulmonary scintigraphy, radionucleotide agents injected into a peripheral vein can be detected where it is trapped in the pulmonary capillary bed. Used to assess pulmonary blood flow.
perfusion technique
maintenance of blood circulation to tissues during cardiopulmonary bypass.
perfusion:ventilation ratio
see ventilation: perfusion ratio.
References in periodicals archive ?
In most of the myocardial perfusion scan reports the intensity and extent of these defects are being mentioned as mild, moderate or severe.
Caption: Figure 2: Anterior and posterior static head images of lung perfusion scan images with Tc-99m macroaggregated albumin (MAA) show focal tracer uptake noted at the region of brain (white arrows) and stomach and faint renal uptake (not shown) indicative of right-to-left shunt.
One month after finishing the treatment period by EECP, the obtained results from above assessments including functional class, life quality, drugs consumption, echocardiography parameters, exercise tolerance test and myocardial perfusion scan were totally recorded in check list by physiatrist All of patients were visited by cardiologist during and after one year.
3 Even patients with positive exercise tolerance test for ischaemia or angiographically documented CAD but normal myocardial perfusion scan (MPS) have been shown to be at low risk for future cardiac events.
A major reason for doing a perfusion scan is to distinguish patients with PPH from those whose pulmonary hypertension is due to blood clots in the lungs.
CT scan brain was done in 70% (n=162) of these patients MRI in 42% (n=97) LP in 33% (n=76) radionuclide cerebral perfusion scan in 3.
Cardiac MRI was used to assess the improvement in LVEF in contrast to nuclear perfusion scan in our study.
In certain situations, only the perfusion scan may be necessary, but normally both parts are performed.
For diagnosing PE, the LRs were: high probability ventilation perfusion scan, 18.
A ventilation perfusion scan was classified as high probability.
Contemporary practices also employ investigations like exercise tolerance test or myocardial perfusion scan to diagnose coronary artery disease but their biggest limitation is the fact that the exercise tests are usually not performed in the settings of acute chest pain syndromes.
On the issue of safety, the radiation dose each patient received, about 14-15 mSv, is comparable to the dose from conventional coronary angiography and less than the exposure during a nuclear perfusion scan, Dr.