Retrograde catheterization of the left ventricle in patients with aortic valve stenosis is commonly performed using a pigtail or coronary arterial catheter. This approach, although usually ultimately successful, may be highly tedious. To overcome the limitations of these conventional catheter shapes, we have designed a catheter specifically for crossing stenotic aortic valves. In a group of 17 patients, mean aortic valve area 0.75 cm2, the average time to cross the aortic valve was 2 minutes 45 seconds and the median time 30-40 seconds. Once the proper size catheter was selected, the average time to cross was 59 seconds. The success of this catheter is based on the operator's ability to "scan" or interrogate the surface of the valve thoroughly by manipulating the catheter and a moveable core straight tip guidewire.