Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2548926 | Journal of Pharmacological Sciences | 2015 | 4 Pages |
Abstract
Effect of abdominal aorto-venocaval shunt (AVS) on the automaticity of the pulmonary-vein myocardium was studied in the rat. Spontaneous electrical activity was observed in one third of the isolated pulmonary-vein preparations from the AVS rats, but scarcely in those from sham-operated rats; the activity was induced by tertiapin and suppressed by carbachol or chelation of intracellular Ca2+. The evoked action potentials in AVS rats had less negative resting membrane potential and longer action potential duration than those in sham-operated rats. These results suggest that the automaticity of the rat pulmonary-vein myocardium is manifested under chronic volume overload.
Keywords
Related Topics
Health Sciences
Pharmacology, Toxicology and Pharmaceutical Science
Pharmacology
Authors
Shogo Hamaguchi, Yayoi Tsuneoka, Ayumi Tanaka, Masahiko Irie, Masato Tsuruta, Takahiro Nakayama, Iyuki Namekata, Mizuki Nada, Megumi Aimoto, Akira Takahara, Hikaru Tanaka,