Ziyatdinova NI, Kuptsova AM, Faskhutdinov LI, Galieva AM, Zefirov AL, Zefirov TL. Effect of If Current Blockade on Newborn Rat Heart Isolated According to Langendorff.
Bull Exp Biol Med 2019;
167:424-427. [PMID:
31529169 DOI:
10.1007/s10517-019-04541-w]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Indexed: 01/09/2023]
Abstract
The study examined the effects of hyperpolarization-activated funny current (If) on HR and coronary flow in Langendorff-isolated hearts from newborn rats. Blockade of If current with ZD7288 changed the examined cardiac parameters. The blocker in a concentration of 10-9 M decreased HR by 26.8% (p≤0.05). In concentrations 10-8, 10-7, 10-6, and 10-5 M ZD7288 produced minor differently directed effects. In a concentration of 10-5 M, ZD7288 reduced coronary flow in the isolated heart (p≤0.01). In other concentrations, the blocker produced no significant effects on coronary flow.
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