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[Angiography of the left ventricle]
J M Lablanche1, C Bauters, P Quandalle
1Service de cardiologie B et hémodynamique, Hôpital cardiologique, Université de Lille II.
Archives Des Maladies Du Coeur Et Des Vaisseaux
|July 1, 1993
Summary
Left ventricular angiography is the gold standard for assessing heart function, calculating volumes, and wall motion. Digital imaging now enables precise, routine calculations of these key cardiac parameters.
Area of Science:
- Cardiology
- Medical Imaging
- Biomedical Engineering
Background:
- Left ventricular angiography (LVA) is the reference standard for evaluating left ventricular (LV) volumes and segmental wall motion.
- Current volume calculation methods (surface-length, Simpson's) assume an ellipsoid LV shape.
- While dual-projection angiography offers minimal accuracy improvement, single-projection (30-degree right anterior oblique) is sufficient for routine assessments.
Purpose of the Study:
- To review the established methods for calculating global and segmental left ventricular function using angiography.
- To highlight validated clinical methods for segmental wall motion analysis.
- To emphasize the impact of digital image processing on routine cardiac assessments.
Main Methods:
- Left ventricular angiography in the 30-degree right anterior oblique (RAO) projection.
- Surface-length and Simpson's methods for LV volume calculation.
- Validated clinical methods for segmental wall motion analysis: Stanford and Rotterdam methods.
- Digitization of angiographic images for parameter calculation.
Main Results:
- Global LV function parameters include end-systolic volume, end-diastolic volume, and ejection fraction.
- Segmental wall motion analysis offers more precise functional assessment.
- The Stanford and Rotterdam methods are clinically validated approaches for segmental analysis.
- Digital image processing facilitates routine calculation of LV functional parameters.
Conclusions:
- Left ventricular angiography, particularly in the 30-degree RAO view, remains the reference standard for LV volume and wall motion assessment.
- Digital image processing has streamlined the routine calculation of critical left ventricular function parameters.
- Validated methods like Stanford and Rotterdam enhance the precision of segmental wall motion analysis.