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Updated: June 24, 2025
Comparison of the findings after these two injections will determine which factor, vagal or cardiac tissue, is the greater in the condition present. The patients with a large cardiac factor are the ones who may be more improved by the digitalis treatment than those in whom the fibrillation is caused by vagus disturbance. The prognosis depends on the condition of the myocardium of the vagus.
Palpating the radial artery is not absolutely reliable in all cases of auricular fibrillation, or in another form of arrhythmia called auricular flutter or tachysystole. Jour. Med. There is always a certain amount of heart block associated with auricular fibrillation so that not all of the auricular stimuli pass through the bundle of His.
Although it was once thought that the auricle was paralyzed in this condition, it probably simply loses its coordinate activity. Auricular fibrillation and auricular flutter are probably simply different degrees of the same condition, and any contractions of the auricles over 200 per minute may be termed an auricular flutter, and below that the term auricular fibrillation may be used.
In the second type, where there was normal auricular activity, but where the ventricular contractions were decreased, atropin affected an increase in the number of ventricular contractions, but did not completely remove the heart block. He adopted atropin where the heart block was associated with auricular fibrillation.
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