,LEFT ANTERIOR DESCENDING ARTERY: , The LAD is a moderate caliber vessel, which is subtotaled in its mid portion for approximately 1.5 cm to 1 cm with subsequent TIMI-I flow distally. 
,LEFT ANTERIOR DESCENDING ARTERY : , The LAD is a moderate caliber vessel , which is subtotaled in its mid portion for approximately 1.5 cm to 1 cm with subsequent TIMI - I flow distally .