Treatment of multifocal atrial tachycardia with metoprolol.

  title={Treatment of multifocal atrial tachycardia with metoprolol.},
  author={P. Hazard and Claudio Burnett},
  journal={Critical care medicine},
  volume={15 1},
We used metoprolol orally or iv in 25 patients with multifocal atrial tachycardia that was complicating severe cardiopulmonary illness, and we observed its effect on heart rate and rhythm, BP, and arterial blood gases. All patients showed a dramatic slowing of heart rate, averaging 54.0 +/- 4.0 beat/min (p less than .001), with only small and transient fall in BP. Seventeen (68%) patients experienced conversion to sinus rhythm, 11 immediately, and six more within 3 h. Time to response averaged… CONTINUE READING