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[Improved cineangiographic evaluation of hypertrophic cardiomyopathy by biventriculography with angled projection]
Insights
Angled biventriculography (BVG) offers improved visualization of cardiac structures in hypertrophic cardiomyopathy (HCM) patients. This technique enhances the precise evaluation of the interventricular septum and mitral valve, aiding in HCM diagnosis.
Area of Science:
- Cardiology
- Medical Imaging
Background:
- Conventional angiography has limitations in diagnosing heart diseases.
- Accurate assessment of ventricular septum and free wall thickness is crucial for hypertrophic cardiomyopathy (HCM) diagnosis.
Purpose of the Study:
- To evaluate the efficacy of angled biventriculography (BVG) in precisely delineating cardiac structures in patients with HCM.
- To compare angled BVG with conventional nonangled BVG for diagnostic accuracy.
Main Methods:
- Performed biventriculography with angled projection (angled BVG) in 14 HCM patients.
- Conducted conventional nonangled BVG in 9 of these patients for comparison.
- Measured interventricular septum length (LIVS) and left ventricular cavity long axis (LLV).
Main Results:
- Angled BVG yielded significantly longer measurements for LIVS and LLV compared to nonangled BVG (p < 0.001).
- Improved visualization of the mitral valve and interventricular septum was observed with angled BVG.
- Systolic anterior motion of the mitral valve, often missed by nonangled methods, was clearly identified.
Conclusions:
- Angled BVG provides increased precision in evaluating the interventricular septum, left ventricular outflow tract, and mitral valve in HCM patients.
- The profile view offered by angled BVG enhances the assessment of septal anatomy and abnormal mitral valve motion.
- Angled BVG is the recommended diagnostic procedure for patients with suspected hypertrophic cardiomyopathy.
Abstract:
Left ventricular cineangiography with angled projection has been designed to overcome limitations of conventional angiography in the diagnosis of various heart diseases. Thus, to delineate the precise extent and degree of the thickness of the ventricular septum and left ventricular free wall in patients with hypertrophic cardiomyopathy, we performed biventriculography with angled projection (angled BVG) in 14 patients with hypertrophic cardiomyopathy (HCM), three with concentric hypertrophy and one with dilated cardiomyopathy. We also performed conventional biventriculography (nonangled BVG) in 9 of these 18 patients. The length of the interventricular septum (LIVS) and the long axis of the left ventricular cavity (LLV) measured by angled BVG (LIVS = 8.07 +/- 1.41 cm and LLV = 9.10 +/- 1.36 cm, n = 9) were significantly longer than those by nonangled BVG (LIVS = 5.88 +/- 1.17 and LLV = 7.15 +/- 1.24, n = 9) (p less than 0.001). In addition, the mitral valve and ventricular septum were visualized more clearly. Systolic anterior motion of the anterior leaflet of the mitral valve was readily identifiable, which was not detected usually by the nonangled method. In summary, angled BVG afforded increased precision in evaluation of the interventricular septum, left ventricular outflow tract and mitral valve in patients with HCM because these structures are seen in profile, an anatomy of the interventricular septum and an abnormal motion of the mitral valve can be better evaluated. Thus, angled BVG is the diagnostic procedure of choice in patients suggestive of hypertrophic cardiomyopathy.