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- W2016913639 abstract "Regulatory guidelines recommend the use of conscious, unrestrained animals for comprehensive cardiovascular safety assessment of a new therapeutic agent. Cardiovascular safety pharmacology studies normally use internal telemetry (surgical implants) in free-moving animals to monitor key ECG endpoints, like the QTc interval, but this technical approach is highly resource intensive. In toxicology studies, ECG recording is also typically performed under chemical or physical restraint, which has a number of disadvantages, e.g., anesthesia confounds, handling stress and limited data collection. External telemetry for ECG recording has the potential to overcome many of these restraint limitations, with the benefit of being a surgically non-invasive method. To evaluate this method, we used two jacket systems: Data Sciences International (DSI) JET™ and Integrated Telemetry Systems (ITS) PhysioJacket™ in implanted beagle dogs. Heart rate and cardiac intervals were monitored continuously for 22–24 h following oral administration of vehicle (water) or 1 mg/kg E-4031. Data obtained from each jacket system was compared with implant-derived data in the same animal. Significant increases in QT/QTcV (25–30 ms) were noted following treatment with 1 mg/kg E-4031 in both external jacket systems and with implanted telemetry. Throughout the recording periods, the normal variations in heart rate and ECG intervals observed in conscious dogs as detected with the jacket systems, mirrored the changes observed via implant telemetry. The overall findings from this study support the use of external telemetry technology as a viable alternative to implants. The data demonstrated that jackets were sufficiently sensitive to detect QT/QTcV changes following E-4031 administration, that were comparable to those derived from implants. As such, this method is an invaluable tool for obtaining high quality ECG data from repeat-dose toxicology studies." @default.
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- W2016913639 date "2009-07-01" @default.
- W2016913639 modified "2023-10-02" @default.
- W2016913639 title "Assessment of two external telemetry systems (PhysioJacket™ and JET™) in beagle dogs with telemetry implants" @default.
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- W2016913639 doi "https://doi.org/10.1016/j.vascn.2009.04.196" @default.
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