THE EFFECT OF BLOCK OF THE ULTRARAPID DELAYED RECTIFIER POTASSIUM CURRENT (IKUR) BY 50 MOU M 4-AMINOPYRIMIDINE ON PACEMAKER ACTIVITY IN THE MOUSE SINOATRIAL AND ATRIOVETRICULAR NODES

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NIKMARAM MOHAMMAD REZA; BOYET M.

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Journal: Journal of Kerman University of Medical Sciences Year:2008 | Volume:15 | Issue:1 Page(s): 79-86

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Title

THE EFFECT OF BLOCK OF THE ULTRARAPID DELAYED RECTIFIER POTASSIUM CURRENT (IKUR) BY 50 MOU M 4-AMINOPYRIMIDINE ON PACEMAKER ACTIVITY IN THE MOUSE SINOATRIAL AND ATRIOVETRICULAR NODES

Author(s)

NIKMARAM MOHAMMAD REZA | BOYET M. | Issue Writer Certificate

Keywords

SINOATRIALNODEQ4

ATRIOVENTRICULAR NODEQ3

ULTRARAPID DELAYED RECTIFIER POTASSIUM CURRENENTQ3

4-AMINO PYRIMIDINEQ3

Abstract

Introduction: In the heart cells, ultrarapid delayed rectifier potassium current (IKur) is one of the important currents in action potential repolarization phase. Ultrarapid delayed rectifier potassium current is specifically blocked by low concentration of 4-AMINO PYRIMIDINE(4-AP). The aim of this study was to determine the effect of low concentration of 4-AMINO PYRIMIDINE blocker on pacemaker activity of sinoatrial node (SAN) and ATRIOVENTRICULAR NODE (AVN) of mouse heart.Method: SAN and AVN were separated and the pacemaker activity of distinct intact SAN and AVN was recorded before and during 50uM4-AP by two separate metal microelectrodes that were in.contact with the endothelail surface of the nodes. Then the action potential cycle length (CL) was measured.Results: 50m M4-Amino Pyrimidine increased the action potential cycle length of SAN and AVN preparations respectively by 20.2±3.3% and 18±3% these increases on the action potential cycle length were significant in both nodes.Conclusion: According to the results, IKur is present in both SAN and AVN nodes and the effect of 50m M4-AP on action potential cycle length (CL) of the two nodes is the same.

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APA: Copy

NIKMARAM, MOHAMMAD REZA, & BOYET, M.. (2008). THE EFFECT OF BLOCK OF THE ULTRARAPID DELAYED RECTIFIER POTASSIUM CURRENT (IKUR) BY 50 MOU M 4-AMINOPYRIMIDINE ON PACEMAKER ACTIVITY IN THE MOUSE SINOATRIAL AND ATRIOVETRICULAR NODES. JOURNAL OF KERMAN UNIVERSITY OF MEDICAL SCIENCES, 15(1), 79-86. SID. https://sid.ir/paper/482/en

Vancouver: Copy

NIKMARAM MOHAMMAD REZA, BOYET M.. THE EFFECT OF BLOCK OF THE ULTRARAPID DELAYED RECTIFIER POTASSIUM CURRENT (IKUR) BY 50 MOU M 4-AMINOPYRIMIDINE ON PACEMAKER ACTIVITY IN THE MOUSE SINOATRIAL AND ATRIOVETRICULAR NODES. JOURNAL OF KERMAN UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2008;15(1):79-86. Available from: https://sid.ir/paper/482/en

IEEE: Copy

MOHAMMAD REZA NIKMARAM, and M. BOYET, “THE EFFECT OF BLOCK OF THE ULTRARAPID DELAYED RECTIFIER POTASSIUM CURRENT (IKUR) BY 50 MOU M 4-AMINOPYRIMIDINE ON PACEMAKER ACTIVITY IN THE MOUSE SINOATRIAL AND ATRIOVETRICULAR NODES,” JOURNAL OF KERMAN UNIVERSITY OF MEDICAL SCIENCES, vol. 15, no. 1, pp. 79–86, 2008, [Online]. Available: https://sid.ir/paper/482/en

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