ABSTRACT
Coronary angiography is almost always performed as a last step in the diagnostic chain of suspected heart atherosclerotic disease. In this context, finding a luminal stenosis is frequently considered as a pathognomonic sign of coronary atherosclerosis. However, other potential causes of coronary stenosis have been reported increasingly, in association or not with atherosclerosis. It is important to note that the correct recognition of the nature of the luminal obstruction has a profound impact on the diagnostic and therapeutic management of the patient. In this chapter, therefore, we revise two important forms of functional coronary obstruction: myocardial bridging, and coronary spasm.
