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KAMBAYASHI R, HAGIWARA-NAGASAWA M, GOTO A, CHIBA K, IZUMI-NAKASEKO H, NAITO AT, MATSUMOTO A, SUGIYAMA A. In vivo characterization of rate-dependent impact on the QT interval of microminipig assessed by atrial electrical pacing: Development of correction formulae of QT interval. J Vet Med Sci 2019; 81:1735-1739. [PMID: 31611491 PMCID: PMC6943312 DOI: 10.1292/jvms.19-0252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 10/03/2019] [Indexed: 11/22/2022] Open
Abstract
Correction formulae of QT interval were developed for the halothane-anesthetized microminipigs by adopting atrial pacing (n=5), which were compared with Bazett's and Fridericia's formulae for humans, and Van de Water's one for dogs. The correction formulae: QTc=QT-0.2072 (RR-750) as linear and QTc=QT/(RR/750)0.4007 as non-linear equations, were developed for microminipigs. These formulae can better correct the QT interval of the microminipigs compared with each of the conventional ones for humans and dogs. Moreover, analysis of the slope constant α values indicates that the rate-dependent change in the ventricular repolarization period of microminipig may better mimic that of humans than that of dogs.
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Affiliation(s)
- Ryuichi KAMBAYASHI
- Department of Pharmacology, Faculty of Medicine, Toho
University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Mihoko HAGIWARA-NAGASAWA
- Department of Pharmacology, Faculty of Medicine, Toho
University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Ai GOTO
- Department of Pharmacology, Faculty of Medicine, Toho
University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Koki CHIBA
- Department of Pharmacology, Faculty of Medicine, Toho
University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Hiroko IZUMI-NAKASEKO
- Department of Pharmacology, Faculty of Medicine, Toho
University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Atsuhiko T. NAITO
- Division of Cellular Physiology, Department of Physiology,
Faculty of Medicine, Toho University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540,
Japan
| | - Akio MATSUMOTO
- Department of Aging Pharmacology, Faculty of Medicine, Toho
University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan
| | - Atsushi SUGIYAMA
- Department of Pharmacology, Faculty of Medicine, Toho
University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan
- Department of Aging Pharmacology, Faculty of Medicine, Toho
University, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan
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