E E Macklin

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The effects of isoetharine on the His bundle electrogram were studied in 10 patients with heart disease. Recordings were made at varied heart rates using atrial pacing. Isoetharine significantly reduced the AH interval with atrial pacing, but it had no effect on the HV interval. Second degree heart block occurred at higher pacing rates after isoetharine(More)
The influence of intravenous phentolamine on hemodynamics, ventilation, and blood gases were studied in 22 patients with cardiac disease. Phentolamine produced a significant increase in the heart rate and cardiac index and a significant decrease in the mean arterial pressure, mean pulmonary artery pressure, left ventricular end diastolic pressure,(More)
The effects of Isuprel administered by means of a mistometer were studied in 8 patients with heart disease. Recordings were made at varied heart rates using atrial pacing. In addition, the functional and effective refractory periods were measured with the use of the extra stimulus technique. Four inhalations of the mistometer were administered to each(More)
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