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Improved evaluation of hypertrophic cardiomyopathy by biventriculography with axial projection
Insights
Angled biventriculography (BVG) offers superior visualization of cardiac structures in hypertrophic cardiomyopathy (HCM) patients. This technique better identifies anatomical abnormalities of the interventricular septum, mitral valve, and left ventricular posterior wall compared to conventional methods.
Area of Science:
- Cardiovascular Imaging
- Cardiac Anatomy
- Interventional Cardiology
Background:
- Hypertrophic cardiomyopathy (HCM) is characterized by abnormal thickening of the heart muscle.
- Accurate delineation of cardiac structures is crucial for diagnosing and managing HCM.
- Conventional imaging techniques may have limitations in visualizing specific anatomical details.
Purpose of the Study:
- To precisely define the anatomical abnormalities of the interventricular septum (IVS), mitral valve (MV), and left ventricular posterior wall (LVPW) in patients with HCM.
- To compare the efficacy of angled biventriculography (BVG) versus conventional non-angled BVG in assessing these structures.
Main Methods:
- Axial biventriculography (BVG) using a hepato-clavicular projection (angled BVG) was employed.
- Seventeen patients with HCM and four with concentric hypertrophy were examined.
- Nine patients also underwent conventional left anterior oblique (LAO) BVG (non-angled BVG) for comparison.
Main Results:
- Angled BVG yielded significantly longer measurements for the IVS and LV cavity axis compared to non-angled BVG.
- The IVS, MV, and LVPW were visualized more clearly in profile using angled BVG.
- Systolic anterior motion of the MV was readily identified with angled BVG in two patients with obstructive HCM (HOCM).
Conclusions:
- Angled BVG is superior to conventional LAO BVG for the angiographic assessment of patients with HCM.
- This technique enhances the visualization of key cardiac structures and dynamic abnormalities in HCM.
Abstract:
To delineate the precise anatomic abnormalities of the interventricular septum (IVS), mitral valve (MV), and left ventricular posterior wall (LVPW) in patients with hypertrophic cardiomyopathy (HCM), we used axial biventriculography (BVG) (hepato-clavicular projection: angled BVG) to examine 17 patients with HCM and four with concentric hypertrophy due to systemic hypertension. We also examined 9 of these 21 patients with conventional left anterior oblique (LAO) BVG (non-angled BVG). The IVS and along axis of the LV cavity when measured by angled BVG were significantly longer than when measured by non-angled BVG. The IVS, MV, and LVPW were better seen in profile in angled than in non-angled BVG. In two patients with HCM with obstruction (HOCM), systolic anterior motion of the anterior leaflet of the MV was readily identifiable with angled BVG, which is usually not the case with non-angled BVG. Thus, angled BVG is superior to conventional LAO BVG in the angiographic assessment of patients with HCM.