LAUSR

Biatrial pacing may be effective in ameliorating symptoms in patients with iatrogenic interatrial dissociation. Introduction A basic tenet of medicine is primum non nocere—“first, do no harm.” As physicians we do our best to carefully weigh the benefits and risks of therapies we offer to patients. When it comes to the performance of invasive procedures, experienced clinicians recognize that complications can arise even in the best of hands, and that sometimes such complications result in new problems requiring further treatments. Herein is presented an extraordinary case of a now 60-yearold patient who as a young adult suffered from the most common form of supraventricular tachycardia seen in practice—typical AV nodal reentrant tachycardia (AVNRT)—and whose clinical course over the years has been anything but typical.