Inversion of the P Wave in the Third Lead of Electrocardiograms with a Large Q-3 Wave
| Autor: | Albert H. Douglas, Charles Shookhoff |
|---|---|
| Rok vydání: | 1934 |
| Předmět: | |
| Zdroj: | Experimental Biology and Medicine. 31:757-760 |
| ISSN: | 1535-3699 1535-3702 |
| DOI: | 10.3181/00379727-31-7309c |
| Popis: | In the course of a study of electrocardiograms which show a large Q-3 deflection, we noted what appeared to be a relative frequency of inversion of the P deflection in the third lead of these tracings. This appeared to be consistent with the finding of Carr, Hamilton and Palmer1 that inversion of P-3 is occasionally associated with the production of a large Q-3 wave in electrocardiograms taken from pregnant women.We undertook to determine the frequency with which an inverted P-3 wave is found in an indifferent series of electrocardiographic tracings and in a series of electrocardiograms which contain a large Q-3 wave.No attempt was made in this study to exclude or separate electrocardiograms showing auricular fibrillation, auricular flutter, paroxysmal auricular tachycardia or nodal rhythm. In tracings where extrasystoles were present these were ignored—the P-waves associated with the normal sinus rhythm alone were examined. No attention was paid to diphasic P-waves or to isoelectric P-intervals. Only whe... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|