Abstract
The hemodynamic effects of a 10 mg bolus of edrophonium chloride followed by a continuous infusion of 0.25 to 1.0 mg per minute, were determined in unanesthetized patients with significant myocardial disease. The effect on heart rate of the drug was negated by studying a group of nine patients with complete heart block and permanently implanted ventricular pacemakers. After the 10 mg bolus, two of the nine patients experienced dizziness, nausea and abdominal cramps associated with a mild decrease in peripheral vascular resistance. There was no significant change in cardiac index, mean blood pressure, brachial artery upstroke time, corrected ejection time, or left ventricular systolic ejection time. This study demonstrated that the continuous infusion of 0.25 to 1.0 mg per minute of edrophonium chloride following a 10 mg loading dose, had no significant effect on myocardial function.
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