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Objective: Percutaneous aortic valve replacement is an emerging therapy for selected patients with severe aortic stenosis. Preoperative imaging of the aortic root facilitates sizing and deployment of the percutaneous aortic valve replacement device. We compared morphologic characteristics of the aortic root in patients with aortic stenosis versus elderly gender-matched controls using multidetector computed tomography.

Methods: Twenty-five consecutive subjects with severe calcific aortic stenosis referred for percutaneous aortic valve replacement and 25 elderly gender-matched controls were scanned on a Siemens Definition Dual Source (Siemens Medical, Forchheim, Germany) multidetector computed tomography scanner. Distances from the valve annulus to the coronary artery ostia and sinotubular junction, dimensions of the aortic root, and characteristics of the valve cusps were determined.