Respiratory failure following adenosine administration.

Adenosine is frequently administered to convert the rhythm of patients with paroxysmal supraventricular tachycardia to sinus rhythm. Adverse reactions are common after its administration, but these have been short-lived because adenosine has a half-life of less than 10 seconds. This report describes a 54-year-old male patient with chronic obstructive pulmonary disease who presented with paroxysmal supraventricular tachycardia at 200 beats/min. A 12-mg bolus injection of adenosine aggravated mild bronchospasm and produced respiratory failure. The patient subsequently required ventilatory support for 9 days. The presence of bronchoconstriction should be considered as a possible contraindication to the administration of intravenous adenosine.