CT pulmonary angiography


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CT pulmonary angiography

The best contemporary test to assess a patient suspected of having a pulmonary embolism The test uses computed tomographic imaging of the pulmonary arteries to identify blood clots in the right ventricular outflow tracts or the pulmonary arteries. The presence of a clot indicates the need for treatment with anticoagulant drugs. It is used as the generally preferred alternative to invasive pulmonary angiography (which, while accurate, requires right ventricular catheterization), or to ventilation/perfusion scanning of the lungs (which often yields indeterminate results).

CAUTION!

Potential hazards of the test include its radiation exposure, its risk for renal failure (esp. in patients with predisposing conditions for kidney injury), and the risk of allergy to the radiological contrast agent used in the test.
See also: angiography
References in periodicals archive ?
Does multi-detector row CT pulmonary angiography reduce the incremental value of indirect
CT venography: A necessary adjunct to CT pulmonary angiography, or a waste of time, money, and radiation?
CT pulmonary angiography and CT venography: Factors associated with vessel enhancement.
Acute right-sided heart failure, which is critical for risk stratification can be assessed at CT pulmonary angiography by measuring the dimensions of right-sided heart cavities or upstream venous structures, such as the SVC or azygos vein10.
A compromise of the central pulmonary arteries or of two or more lobar arteries by nuclear magnetic resonance or CT pulmonary angiography and confirmed by conventional pulmonary angiography has been defined as massive PE14.
In two studies of 25 patients with PE and 14 patients with massive PE, Contractor et al and Lim et al found that signs of RV strain at CT pulmonary angiography (RV/LV diameter ratiogreater than 1, leftward septal bowing) had a sensitivity of 78%-92%, specificity of 100%, and positive predictive value of 100% when compared to echocardiographic findings for the detection of RV dysfunction similarly other studies have estimated that an RV/LV diameter ratio superior to 1.
This study was not designed to investigate the incidence of pulmonary emboli in ICU patients, but rather to assess the utility of CT pulmonary angiography.
Multidetector row CT pulmonary angiography and indirect venography for the diagnosis of venous thromboembolic disease in intensive care unit patients.
0 rads per breast is typically delivered during CT pulmonary angiography.
The effect of single detector CT versus MDCT on clinical outcomes in patients with suspected acute pulmonary embolsm and negative results on CT pulmonary angiography.
CT pulmonary angiography for acute pulmonary embolism: Cost-effectiveness analysis and review of the literature.