Normal RCA

Normal RCA with posterior interventricular (PIV) artery running inferiorly, and the posterior lateral branches branching superiorly in this view. (Courtesy of Toronto General Hospital Catheterization Laboratory)

Perfusion Scan

Perfusion scan showing blood flow during rest and persantine stress. White areas mark those of ischemia. Irreversible defects are seen with ischemia both at rest and stress. (courtesy of Dr. Chi-Ming Chow)