Effect of intracoronary adenosine infusion during coronary intervention on myocardial reperfusion injury in patients with acute myocardial infarction

The American Journal of Cardiology
Marc J ClaeysChris J Vrints

Abstract

Despite early recanalization of an occluded infarct artery, up to 33% of patients with acute myocardial infarction do not obtain complete myocardial reperfusion due to a process of reperfusion injury. This study assessed whether adjunctive therapy with adenosine might prevent or attenuate the phenomenon of myocardial reperfusion injury. Myocardial reperfusion was assessed in 79 consecutive patients receiving a 20-minute intracoronary infusion of adenosine during percutaneous coronary intervention (PCI) and in a historical cohort of 200 patients with acute myocardial infarction who were treated with PCI (controls). Myocardial reperfusion injury was defined as persistent (> or =50% of initial value) ST-segment elevation after successful recanalization. Its effect on infarct size was evaluated by calculating the Selvester QRS score before intervention and at follow-up. Myocardial reperfusion injury was present in 19% of patients receiving adenosine versus 35% of control patients (p = 0.004). Evaluation of infarct expansion over time showed almost no change in the QRS score in patients receiving adenosine (3.4 +/- 3.0 before PCI; 3.5 +/- 3.1 at follow-up). In contrast, infarct QRS score in the control group worsened from 3.1 +/- 2....Continue Reading

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