Myocardial bridging associated with the mid left anterior descending artery distal to the second diagonal branch
There is mild to moderate reduction in vessel calibre on imaging reconstructed at 75 percent of the RR interval (during ventricular diastole) - key image 1
This segment demonstrates severe vessel narrowing on imaging reconstructed at 34 percent of the RR interval (during ventricular systole) - key image 2
The remaining left anterior descending artery remains patent and can be traced distally to the cardiac apex