TEMPLE UNIVERSITY HEALTH SYSTEM IMAGE: RIYAZ BASHIR, MD, FACC, PROFESSOR OF MEDICINE AND DIRECTOR OF VASCULAR AND ENDOVASCULAR MEDICINE IN THE SECTION OF CARDIOLOGY, DEPARTMENT OF MEDICINE, AT THE LEWIS KATZ SCHOOL OF MEDICINE AND TEMPLE UNIVERSITY HOSPITAL CREDIT: LEWIS KATZ SCHOOL OF MEDICINE AT TEMPLE UNIVERSITY Old blood clots in lung arteries can obstruct...