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- W2383585890 abstract "Objective To investigate the electrophysiologic properties of the crista terminalis (CT) and their implication in the pathogenesis of atrial tachycardia in rabbits. Methods Using standard glass microelectrode technique, cellular action potentials (APs) of CT and pectinate muscle (PM) were recorded in normal Tyroid's perfusion and Tyroid's perfusion with 4 μmmol/L isoproterenol. Longitudinal conduction velocity (VL) and transverse conduction velocity ( VT) of the CT were measured. Results CT tissure showed a trend of spontaneous phase 4 depolarization. Conduction anisotropy (VL/VT) of the CT was 4. 53 ± 0. 91. The action potential duration of the CT was longer than that of PM cells[ APD20,APD90 were (28. 1 ± 3. 5),(145. 3 ±7. 1) ,(21. 8 ±4. 1) ,(125. 3 ±6. 3)ms for CT and PM cells, respectively, P all 0. 01 ]. Early and delayed action depolarization were recorded after isoproterenol perfusion. A fast paroxysmal irregular rhythm was recorded, which could be arrested by 0. 1 mmol/L Isoptin. Conclusion The latent autorhythmicity, trigger activity and conduction properties of the CT may provide electrophysiologic basis for the occurrence and sustain of atrial arrhythmia." @default.
- W2383585890 created "2016-06-24" @default.
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- W2383585890 date "2004-01-01" @default.
- W2383585890 modified "2023-09-25" @default.
- W2383585890 title "The electrophysiologic characteristics and implication of crista terminalis of rabbits" @default.
- W2383585890 hasPublicationYear "2004" @default.
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