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Tachycardia induced myocardial dysfunction. A reversible phenomenon?
  1. C J McLaran,
  2. B J Gersh,
  3. D D Sugrue,
  4. S C Hammill,
  5. J B Seward,
  6. D R Holmes, Jr


    Four patients with myocardial dysfunction related to tachycardia underwent electrophysiological studies, which showed a re-entrant supraventricular tachycardia using an accessory atrioventricular connexion. Serial assessment of left ventricular function by echocardiography before and after control of the tachycardia indicated a variable degree of reversibility. Endomyocardial biopsy in two patients detected non-specific histological changes. Because of the possible role of ischaemia in this condition effective control of prolonged tachycardia is needed to prevent deterioration of myocardial function.

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