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- W2016193569 abstract "In small animals, His bundle activity is commonly registered using intracavitary electrodes in Langendorff-perfused hearts. The present study evaluates the feasibility of epicardial registration of His bundle activity in 30 guinea pigs in vivo, anesthetized with 60 mg/kg sodium pentobarbital i.p. Following median sternotomy, a bipolar electrode, mounted on a flexible stand, was placed into the aortic-right atrial groove. His bundle activity was easily detected in all animals. Mean PA, AH, and HV intervals were 16.7 +/- 1.4 msec (range: 6.0-34.0 ms), 36.4 +/- 1.5 ms (range: 22.0-54.0 msec) and 14.4 +/- 0.4 msec (range: 9.0-20 msec), respectively. Administration of verapamil and vagal stimulation induced significant prolongations of AH intervals without affecting HV intervals; lidocaine prolonged both AH and HV intervals. Both at baseline and following drug administration there was excellent agreement between the AH and HV intervals assessed from simultaneously registered epicardial and endocardial His bundle electrograms (n = 12). The presented model provides reproducible values for atrioventricular (AV) nodal and His-to-ventricular conduction intervals in the guinea-pig in vivo and will, thus, be a valuable tool in electrophysiologic drug evaluation." @default.
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- W2016193569 title "Epicardial his bundle recordings in the guinea pig in vivo" @default.
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- W2016193569 doi "https://doi.org/10.1016/1056-8719(92)90040-8" @default.
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