A simple test, called the Ankle-Brachial Index, or ABI, can quickly and painlessly determine if you have P.A.D. The ABI takes 10 to 15 minutes and can be done by your internist with a specialized "Doppler" stethoscope and blood pressure cuff. It involves simply measuring the blood pressure in each of your ankles and in each of your arms. Your doctor then compares the two readings. A normal ABI reading is 1.0 (with a range of .9 to 1.3). If your blood pressure is lower in the ankle than the arm, a blockage is likely present in an artery somewhere between your heart and ankle - and, if so, you have P.A.D. Because it is a simple test, the ABI can be done yearly if needed to determine if blockages are getting worse.