Biplane Angiographic Volumetry Using the Right Anterior Oblique and Half-Axial Left Anterior Oblique Technique

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Abstract
Half-axial biplane left ventriculography was performed in patients undergoing cardiac catheterization for clinically suspected coronary artery or valvular disease. The right anterior oblique view and a left anterior oblique projection were obtained by angling the lateral image intensifier in a caudo-cranial direction so that the long axis of the left ventricle was more nearly perpendicular to the horizontal beam. Cardiac output showed a linear correlation with outputs determined by the thermodilution method.