Abstract
1. Three groups of agents were studied for their prophylactic effect against the production of ventricular fibrillation in barbitalized dogs given epinephrine during chloroform anesthesia.
a. So-called coronary vasodilating agents: sodium nitrite, aminophylline, papaverine, and quinacrine.
b. Agents decreasing myocardial excitability: procaine and quinidine sulfate.
c. Adrenolytic agents: dibenamine and priscol.
2. Criteria for protection against ventricular fibrillation were defined so as to include prevention of increased ventricular excitability preceding fibrillation as well as prevention of fibrillation.
3. Coronary dilating agents afford no protection.
4. Procaine affords no practical protection.
5. Quinidine sulfate affords appreciable and consistent protection.
6. Adrenolytic agents afford complete protection.
7. A pressor response to epinephrine is not necessary for the production of this type of ventricular fibrillation.
Footnotes
- Received November 8, 1948.
- 1949 by The American Society for Pharmacology and Experimental Therapeutics
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