[Primary percutaneous coronary intervention in patients with acute myocardial infarction induced by left main artery occlusion or severe stenosis].
OBJECTIVE
The effects of primary percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI) induced by left main (LM) artery occlusion were analyzed retrospectively in this study.


METHODS
A total of 1343 consecutive AMI patients who underwent primary PCI between January 1995 and December 2004 were retrospectively studied.


RESULTS
LM occlusion or severe stenosis were found in 11 patients [all male, mean age (56.4 +/- 9.2) years (range 43-70 years)], cardiogenic shock was overt in 6 patients. Primary PCI were performed under the assistance of intra-aortic balloon pump (IABP) in these patients [8 stent implantation, 3 balloon dilation and 2 necessitating emergency CABG after balloon dilation]. In-hospital mortality was 45.5% (5/11). Three-month follow-up were made in all survivals (6/11). Analysis showed good collateral circulation flow from right coronary artery to left coronary artery was existed in all survival cases before PCI.


CONCLUSIONS
Prognosis of AMI patients with LM artery obstruction or severe stenosis was poor. Patients with pre-existed collateral circulation before primary PCI and IABP had a better clinical outcomes.
Wang
Le-feng
LF
Heart Center, Beijing Chaoyang Hospital, Institute of Cardiovascular Diseases, Capital University of Medical Science, Beijing 100020, China. wlf311@sohu.com
Xu
Li
L
Yang
Xin-chun
XC
Ge
Yong-gui
YG
Wang
Hong-shi
HS
Tong
Zi-chuan
ZC
Zou
Yang-chun
YC
Xue
Wei-zhen
WZ
Li
Wei-ming
WM
D000328:Adult; D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D001157:Arterial Occlusive Diseases / Q000150:complications*; D023921:Coronary Stenosis / Q000150:complications*; D004638:Emergency Treatment; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology / Q000628:therapy*; D011379:Prognosis; D012189:Retrospective Studies