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Evaluation of haemodynamic effects of intravenous propranolol at low dosage (1 and 2 mg) in acute myocardial infarction.
  1. B Letac,
  2. J Letournel

    Abstract

    The haemodynamic effects of intravenous propranolol at low dosage (1 and 2 mg) have been evaluated on 14 patients in the acute stage of myocardial infarction. The first 1 mg propranolol was not followed by any significant variation in the variables measured. After the second 1 mg propranolol, the heart rate, cardiac index, and stroke index decreased significantly but moderately. Changes in pulmonary wedge pressure were not significant. It is concluded that intravenous propranolol in the small dosage of 1 or 2 mg, at which antiarrhythmic effect is still produced, has only a negligible depressant myocardial effect.

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