Coronary Anatomy and Reperfusion Success in Acute Myocardial Infarction with ST Segment Elevation

Introduction: Multivessel disease has a major impact on reperfusion in acute myocardial infarction with ST segment elevation (STEMI), as well as on patients’ prognostic after primary percutaneous coronary intervention (PCI). Concurrently with the invasive treatment, a precise description of the coronary anatomy is obtained. However, there is only one scoring system based just on anatomy to appreciate the prognosis after PCI – the SYNTAX score (SXS) – and it was recently validated for STEMI cases. The relationship between the SXS and myocardial reperfusion has not been studied till now.
Material and methods: A retrospective study was performed including cases admitted with STEMI between 01 January 2010–31 January 2011. The SXSs were calculated. As a surrogate for reperfusion, ST segment resolution after angioplasty was measured and compared between the low, medium and high SXS tertiles. Total in-hospital mortality was also evaluated as a function of the SXS score.
Results: Eighty-four patients were enrolled in the study. The groups with low, medium and high values of SXS were homogenous with regard to: age, sex, presence of arterial hypertension, diabetes, smoking, ischemic period, pre- and postprocedural thrombolysis in myocardial infarction (TIMI) flow. However, mean ejection fraction was significantly lower in medium or high SXS tertiles (p < 0.05). Medium and high values of SXS were significantly associated with poor ST segment resolution, as well as a higher in-hospital mortality (p < 0.05).
Conclusion: Complex coronary anatomy has a negative influence on the short-term prognosis of STEMI, possibly partially by poor reperfusion, in spite of achieving a good epicardial flow.