Scintigraphic assessment of left ventricular aneurysms
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Radionuclide cineangiography accurately identified left ventricular aneurysms and abnormal wall motion in coronary artery disease patients. This technique is superior to gated cardiac blood pool imaging for assessing ventricular function.
Area of Science:
- Cardiology
- Nuclear Medicine
- Medical Imaging
Background:
- Coronary artery disease (CAD) can lead to left ventricular (LV) aneurysm and impaired function.
- Accurate assessment of LV wall motion is crucial for managing CAD patients.
Purpose of the Study:
- To compare the efficacy of radionuclide cineangiography (RNC) and gated cardiac blood pool scintigraphy (GBP) in evaluating LV aneurysm and wall motion abnormalities in CAD patients.
- To determine if clinical evaluation alone is sufficient for diagnosis.
Main Methods:
- Thirty-five CAD patients with suspected LV aneurysm underwent clinical examination, GBP, and RNC.
- Thirty-three patients also had coronary angiography and contrast left ventriculography.
- LV wall motion was assessed for akinesia, dyskinesia, and hypokinesis.
Main Results:
- RNC correctly identified all cases of LV aneurysm or hypokinesis.
- Clinical evaluation was insufficient to differentiate aneurysm from hypokinesis.
- RNC was superior to GBP for qualitative assessment of abnormal ventricular wall motion.
- Good correlation was found between contrast ventriculography and GBP for LV ejection fraction.
Conclusions:
- Radionuclide cineangiography is a reliable and preferable method for assessing LV aneurysm and wall motion abnormalities in CAD.
- GBP can provide accurate LV ejection fraction but is less effective for qualitative wall motion analysis compared to RNC.
Abstract:
Thirty-five patients with coronary artery disease and possible left ventricular aneurysm underwent routine clinical examination, gated cardiac blood pool scintigraphy, and radionuclide cineangiography. Thirty-three of the 35 patients had coronary angiography and contrast left ventriculography. Sixteen patients had segmental left ventricular akinesia or dyskinesia, and 17 demonstrated left ventricular hypokinesis on contrast ventriculograms. Two patients had aneurysm confirmed at autopsy. Routine clinical evaluation was not sufficient to separate patients with aneurysm from those with hypokinesis. Radionuclide cineangiography correctly identified all cases of aneurysm or hypokinesis. The cinescintigraphic technique was preferable to the gated cardiac blood pool technique for qualitatively assessing and classifying abnormal ventricular wall motion. There was good correlation of the left ventricular ejection fraction by contrast ventriculograms and gated scintigrams in patients with either aneurysm or hypokinesis.