Abstract
Auricular fibrillation has hitherto been produced experimentally only by faradization of the auricle, and under these conditions the period of fibrillation rarely outlasts the period of stimulation. Moreover, though it is usually possible to cause spontaneous auricular fibrillation in the dog to cease abruptly after the injection of quinidine it is, as Alfred Cohn has reported,1 only rarely possible to stop the fibrillation during faradization of the auricle. This practically prevents a satisfactory experimental study of the drugs that might be used to influence auricular fibrillation.In this investigation we have produced auricular fibrillation in dogs by throwing into the auricle a cycle of 3 independent make and break induction shocks, about one-eighth of a second apart, each shock being applied to a different part of the auricle. The fibrillary contractions were easily visible in the wall of the auricle and in the electrocardiogram, and were accompanied by the usual absolute arrhythmia in the carotid ...
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