Recent angina and some chest pressure tightness and occasional burning. EKG negative, echocardiogram negative, stress test positive, nuclear cardiolite stress test positive and suggestive of inferior lateral ischemia. Ejection fraction within normal range. Will have heart cath next. DR. doesn't seem to think there is a blockage, but wants to test to be certain. What is the liklihood of blockage? Have hypertension, overweight, sedentary lifestyle, and high cholesterol.