Analysis on the risk factors for occurrence of electrical storm in percutaneous coronary intervention and its treatment

Abstract

Objective To investigate the risk factors for occurrence of electrical storm in the patients with acute ST segment elevation myocardial infarction (STEMI) when treat them by percutaneous coronary intervention (PCI) and provide evidence for prospective treatment.Methods Collected the clinical data of 280 patients with STEMI and treated by PCI from January 2008 to December 2011,the patients with no less than twice spontaneous ventricular tachycardia (VT) or ventricular fibrillation (VF) were classified to the electrical storm group and others were classified to control group.Results The number of patients with electrical storm is nineteen and the incidence rate is 6.8％.In early group (from January 2008 to December 2009),the number of patients with electrical storm is sixteen.In late group (from January 2010 to December 2011),the number of patients with electrical storm is three.The electrical storm group:The value of creatine kinase isoenzyme MB (CK-MB),the value of troponin I (TNI),right coronary artery being the infarction related artery (IRA),TIMI level,bradycardia and sustained hypotension in the electrical group are significantly higher than those of control group (P ＜ 0.05).Multiple logistic regression analysis showed that the independent predictors of VAS were the value of troponin I (TNI),TIMI level and sustained hypotension.Conclusions The value of creatine kinase isoenzyme MB (CK-MB),the value of troponin I (TNI),right coronary artery being the infarction related artery (IRA),TIMI level,bradycardia and sustained hypotension are the risk factors for occurrence of electrical storm.the value of troponin I (TNI),TIMI level and sustained hypotension were stronger predictors of electrical storm.Early treatment to the risk factors can reduce the incidence of VAS,and improve the prognosis. Key words: Myocardial infarction; Percutaneous coronary angioplasty; Ventricular arrhythmia storms ; Risk factors; Treatment