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Assessment of cardiac wall motion with the ejection fraction image: a comparison with contrast left ventriculography
Insights
This study compared left ventriculography and ejection fraction (EF) imaging in ischemic heart disease patients. EF imaging showed good correlation with ventriculography for assessing regional heart function.
Area of Science:
- Cardiology
- Medical Imaging
- Diagnostic Techniques
Background:
- Ischemic heart disease (IHD) significantly impacts left ventricular function.
- Accurate assessment of regional ejection fraction (EF) is crucial for IHD management.
- Non-invasive imaging modalities are continuously evaluated for improved diagnostic accuracy.
Purpose of the Study:
- To compare the diagnostic capabilities of biplane contrast left ventriculography and gated blood pool scans for evaluating regional left ventricular asynergy in patients with IHD.
- To assess the correlation between regional EF derived from EF images and traditional EF calculations.
Main Methods:
- Twenty patients with IHD underwent biplane contrast left ventriculography and gated blood pool scans.
- EF images were generated from gated blood pool scans.
- Left ventriculograms and EF images were spatially correlated and compared for sites of asynergy.
- Regional EF from EF images was compared with EF calculated from left ventricular volume curves.
Main Results:
- A good correlation (r = 0.94) was observed between mean regional EF from EF images and EF calculated from left ventricular volume curves (n=50).
- Specific segments of the contrast ventriculogram corresponded to regions on the EF image, though differentiation was sometimes difficult.
- Diffuse asynergy with low EF (<30%) resulted in significant defects on the EF image.
Conclusions:
- Gated blood pool scans, generating EF images, offer a valuable method for assessing regional left ventricular function in IHD.
- EF imaging demonstrates good correlation with established methods, aiding in the evaluation of cardiac asynergy.
- This technique can help identify areas of impaired contractility in ischemic heart disease.
Abstract:
Twenty patients with ischemic heart disease were studied with biplane contrast left ventriculography and gated bloob pool scans. An ejection fraction (EF) image was calculated from each gated blood pool scan. The EF image and contrast ventriculograms were divided into three regions and seven segments respectively. The sites of asynergy observed in each study were compared. Segments two, three and six of the contrast ventriculogram corresponded to the anteroseptal and inferoapical regions of the EF image, but it was difficult to differentiate between these segments on the EF image. Segments three and four corresponded to the inferoapical region and segments five and seven corresponded to the posterolateral region. Diffuse asynergy with a low EF (less than 30%) causes a large defect on the EF image. The mean regional EF obtained from the EF image correlated well with the EF calculated from the left ventricular volume curve (n = 50, r = 0.94).