Adenosine in the treatment of supraventricular tachycardia: 5 years of experience (2002-2006)

We report a retrospective analysis of 5 years of adenosine use in our emergency department (2002-2006). We treated 454 patients with an intravenous bolus of adenosine. The cohort was made up of 40.7% men and 59.3% women, with mean age of 47.32 years, mean heart rate of 162.48 beats per minute. Among them, 73% responded immediately to the 6-mg dose, 15% responded after the second 12-mg dose, and 11% responded to a further 12-mg dose, whereas 11% were unresponsive. We observed minor side effects in a high percentage of patients (ie, chest tightness 83%, flushing 39.4%, sense of impending death 7%). Only 1 major adverse effect was recorded, that is, administering 12 mg of adenosine induced a marked acceleration in the ventricular rate of a patient with an undiagnosed atrial flutter, caused by induction of atrioventricular conduction (1:1). Our results confirm that when patients are appropriately selected, adenosine is probably the best available drug to treat paroxysmal supraventricular tachycardias, especially in emergency situations. (c) 2008 Elsevier Inc. All rights reserved.