Tag Jonathan S Ruan MD FACC RPVI

Background Diagnostic ultrasonography is the use of ultrasound to image anatomical structures. Ultrasound is sound waves that have a frequency above what the human ear can hear, or higher than 20 × 10 4 Hz. Diagnostic ultrasound is usually on the order…

Background The ankle-brachial index (ABI) is a common noninvasive test used to determine if there is occlusive disease of the peripheral vasculature. It uses the brachial arterial systolic blood pressure as the control, assuming it to be nonocclusive, and compares…