Percutaneous coronary revascularization improves the prognosis of patients with cardiogenic shock in acute coronary syndrome: a chronological study.
BACKGROUND
Cardiogenic shock complicating acute coronary syndrome (ACS) implies grim prognosis with conventional management. Previous studies of coronary intervention yielded controversial results and were rarely analyzed chronologically. This study was to determine the impact of percutaneous coronary revascularization on outcome by studying two time periods 5 years apart in which the revascularization was more frequent and techniques more refined in the later period.


METHODS
All patients admitted to the intensive or coronary care unit for ACS in two 1.5-year study periods (Period I: Jan 1994-Jun 1995, Period II: Oct 1999-Apr 2000) were retrospectively screened. Patients who met strict criteria of cardiogenic shock within 24 h of ACS were enrolled. The demographics, management and in-hospital/3-month outcomes were analyzed.


RESULTS
Thirty-seven patients (33M/4F, aged 65+/-8 years) were enrolled in Period I and 32 patients (25M/7F, aged 68+/-13 years) in Period II. The incidence of cardiogenic shock was 11.8 and 9.3%, respectively. The demographics were similar except patients in Period II were older. Significantly more coronary angiography and interventions were done in the later period. The in-hospital (68 vs. 44%, P=0.047) and 3-month mortalities (70 vs. 44%, P=0.03) were significantly reduced in Period II. The in-hospital survivors in two study periods differed only in use of coronary angiography (94 vs. 50%, P=0.005) and interventions (83 vs. 33%, P=0.005) but not others.


CONCLUSIONS
Percutaneous coronary revascularization does improve the clinical outcome of cardiogenic shock when analyzed chronologically. This treatment is warranted in every such patient in the interventional era.
Ho
Tung-Ching
TC
Division of Cardiology, Department of Medicine, Taichung Veterans General Hospital, 160, Sector 3, Chung-Kang Road, 407, Taichung, Taiwan.
Ting
Chih-Tai
CT
Liu
Tsun-Jui
TJ
Liang
Kae-Woei
KW
Ho
Huang-Yun
HY
Hsueh
Chung-Whei
CW
Wang
Kuo-Yang
KY
Lin
Wei-Wen
WW
Lee
Wen-Lieng
WL
D000368:Aged; D000369:Aged, 80 and over; D000789:Angina, Unstable / Q000150:complications* / Q000628:therapy; D015906:Angioplasty, Balloon, Coronary / Q000379:methods*; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications* / Q000628:therapy; D011379:Prognosis; D012189:Retrospective Studies; D012770:Shock, Cardiogenic / Q000209:etiology / Q000401:mortality / Q000628:therapy*; D013997:Time Factors; D016896:Treatment Outcome