Validation of SYNTAX (Synergy between PCI with Taxus and Cardiac Surgery) score for prediction of outcomes after unprotected left main coronary revascularization.
OBJECTIVE
This study aimed to validate the SYNTAX (Synergy between PCI with Taxus and Cardiac Surgery) score representing angiographic complexity after unprotected left main coronary artery (ULMCA) revascularization.


BACKGROUND
The validity of the SYNTAX score has been adequately evaluated.


METHODS
The SYNTAX scores were calculated for 1,580 patients in a large multicenter registry who underwent percutaneous coronary intervention (PCI) (n = 819) or coronary artery bypass graft (CABG) (n = 761) for ULMCA stenosis. The outcomes of interests were 3-year incidences of major adverse vascular events (MAVE), including death, Q-wave myocardial infarction, and stroke and major adverse cardiac and cerebrovascular events (MACCE), including MAVE and target vessel revascularization of ULMCA.


RESULTS
The incidence of 3-year MAVE was 6.2% in the lowest (< or =23), 7.1% in the intermediate (23 to approximately 36), and 17.4% in the highest (>36) SYNTAX score tertile groups after PCI (p = 0.010). However, the incidences of MAVE in the CABG group and MACCE in the PCI and CABG groups did not differ among the SYNTAX tertiles. In subgroups, the MAVE (p = 0.005) and MACCE (p = 0.007) rates according to the SYNTAX score tertiles were significantly different in patients receiving drug-eluting stent, not in those receiving bare-metal stent. When compared with the clinical EuroSCORE (European System for Cardiac Operative Risk Evaluation), the C-indexes of SYNTAX score and EuroSCORE were 0.59 and 0.67, respectively, for discrimination of MAVE and 0.53 and 0.57, respectively, for MACCE.


CONCLUSIONS
The angiographic SYNTAX score seems to play a partial role in predicting long-term adverse events after PCI for ULMCA stenosis. A complementary consideration of patient's clinical risk might improve the predictive ability of risk score.
Kim
Young-Hak
YH
Department of Cardiology, Center for Medical Research and Information, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
Park
Duk-Woo
DW
Kim
Won-Jang
WJ
Lee
Jong-Young
JY
Yun
Sung-Cheol
SC
Kang
Soo-Jin
SJ
Lee
Seung-Whan
SW
Lee
Cheol Whan
CW
Park
Seong-Wook
SW
Park
Seung-Jung
SJ
D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects / Q000295:instrumentation* / Q000401:mortality; D002317:Cardiovascular Agents / Q000008:administration & dosage*; D002561:Cerebrovascular Disorders / Q000209:etiology; D017023:Coronary Angiography; D001026:Coronary Artery Bypass / Q000009:adverse effects / Q000401:mortality; D023921:Coronary Stenosis / Q000000981:diagnostic imaging / Q000401:mortality / Q000601:surgery / Q000628:therapy*; D054855:Drug-Eluting Stents; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology; D017239:Paclitaxel / Q000008:administration & dosage*; D011237:Predictive Value of Tests; D016016:Proportional Hazards Models; D011474:Prosthesis Design; D012042:Registries; D015203:Reproducibility of Results; D056910:Republic of Korea; D012189:Retrospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome
D002317:Cardiovascular Agents; D017239:Paclitaxel