[Retrograde dissection of the common trunk of the left coronary vessel during angioplasty of left anterior descending coronary artery. Apropos of 2 cases].

Acute dissection of the left main coronary artery during coronary angiography or angioplasty is a rare but well known complication; it is attributed to a mechanical trauma caused by the tip of the catheter guide wire. The authors present two cases of dissection at the site of coronary angioplasty with a retrograde extension to the left main stem requiring emergency coronary surgery.