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Past Issue:
Volume 21, Number 1 • January 2008
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Regular narrow QRS and regular wide QRS tachycardias in a woman with mitral regurgitation of uncertain etiology

D. Luke Glancy, MD, Frank E. Wilklow, MD, Christina Lopez, MD, Babu Makkena, MD, and Frederick Helmcke, MD

Since no abstract is available, the first paragraph is reprinted.

A 64-year-old woman had been experiencing short episodes of rapid regular heart beating for nearly a year. The bouts became frequent and lengthy, resulting in a hospital admission a month earlier when intravenously administered adenosine terminated an episode. She was discharged on diltiazem, but the bouts of tachycardia continued and were accompanied by light-headedness and sometimes nausea. When she returned to the hospital with one of these episodes, a narrow QRS complex tachycardia again was documented and again was terminated by adenosine (Figures 1 and 2).