Author + information
- Received July 25, 1984
- Revision received July 8, 1985
- Accepted July 15, 1985
- Published online January 1, 1986.
- Sung Soon Kim, MD, FACC,
- Jose Gallastegui, MD, FACC,
- William J. Welch, MD, FACC and
- Robert A. Bauernfeind, MD, FACCa
- ↵aAddress for reprints: Robert A. Bauernfeind, MD, Medical College of Virginia, Box 53, MCV Station, Richmond, Virginia 23298-0001.
Electrophysiologic studies were performed in a woman who had two varieties of paroxysmal wide QRS tachycardia after mitral valve replacement with a Starr-Edwards prosthesis. One tachycardia originated in the left anterior fascicle; QRS complexes were 100 ms wide and resembled right bundle branch block with left posterior fascicular block, and a His bundle potential preceded each QRS by an interval of 20 ms (compared with 50 ms during sinus rhythm). The other tachycardia originated in the left ventricle. Clinical and echocardiographic observations suggested that the tachycardias were caused by mechanical stimulation of the interventricular septum by the mitral prosthesis.
This study was supported in part by Grants HL-07387 and HL-18794 from the National Heart, Lung, and Blood Institute of the National Institutes of Health, Bethesda, Maryland.
- Received July 25, 1984.
- Revision received July 8, 1985.
- Accepted July 15, 1985.
- American College of Cardiology Foundation