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Department of Anesthesia, University of Iowa Hospitals and Clinics, Iowa City
Address correspondence and reprint requests to Sebastian Schulz-Stübner, MD, PhD, University of Iowa Hospitals and Clinics Department of Anesthesia, 6JCP 200 Hawkins Dr., Iowa City, IA 52242. Address e-mail to sebastian-schulz-stubner{at}uiowa.edu.
Small-dose theophylline can be a useful alternative in the treatment of bradycardia in patients with spinal cord injury. In this series of three cases, I describe its successful use for this indication. In one case, initiation of theophylline treatment also increased respiratory drive and minute ventilation. A possible mechanism is that theophylline increases the force of contraction of diaphragmatic muscles because of enhancement of calcium uptake through an adenosine-mediated channel. The antibradycardiac effect is probably mediated through one or more different molecular mechanisms, which seem to be mediated by inhibition of phosphodiesterase 3.
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