1. Persistent Catheter-induced Coronary Artery Spasm
James Cameron, M.B.B.S., Allan Murphy, M.B.B.S. 
CHEST 
Volume 83, Issue 4, (April 1983)
DOI: /chest a
Copyright © 1983 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Right coronary artery angiogram in the left anterior oblique projection following administration of sublingual nitroglycerin (0.6 mg). This demonstrates persistent severe proximal spasm.
CHEST  , DOI: ( /chest a)
Copyright © 1983 The American College of Chest Physicians Terms and Conditions