Prognostic value of SYNTAX score and SYNTAX score II in an 'all-comers' population treated with angoplasty

The SYNTAX score and SYNTAX score II have a high predictive capacity for adverse cardiovascular events. We aimed to demonstrate that both scores were good predictors of long-term adverse outcomes in an 'all-comers' population treated with a percutaneous coronary intervention (PCI).

In the study, we included 785 patients who received an angioplasty at our center between January 2011 and December 2012. The patients were distributed in tertiles according to the SYNTAX score and SYNTAX score II values; for the SYNTAX score - low ≤6.5 (n = 225); mid >6.5, <11.5 (n = 229); high  ≥11.5 (n = 221); and for the SYNTAX score II PCI: low ≤20.5 (n = 226); mid >20.5, < 29.6 (n = 221); and high ≥29.6 (n = 218).

The rates of major adverse cardiovascular events, death, cardiac death and new revascularizations at 3 years were significantly higher in the highest tertile of both the scores. For SYNTAX score: major adverse cardiovascular events, 12-15.3-21.7%, P < 0.001; death, 7.6-8.3-14%, P = 0.04; cardiac death, 3.2-2.7-7.5%, P = 0.03; new revascularizations, 4.5-8.6-10.4%, P = 0.001. For SYNTAX score II PCI: major adverse cardiovascular events, 8-10.9-28.9%, P < 0.001; death, 3.1-3.6-21.5%, P < 0.001; cardiac death, 0.9-0.5-11.4%, P < 0.001; new revascularizations, 4.5-8.2-11.3%, P = 0.03.

The SYNTAX score II showed better predictive capacity than the SYNTAX score for major adverse cardiovascular events, death and cardiac death, with no difference noted for new revascularizations, and it was an independent predictor for these events in an 'all-comers' population.