© 2001 by European Society of Cardiology
Copyright © 2001, European Society of Cardiology
Considerations in studying the transient outward K+ current in cells exhibiting the hyperpolarization-activated current
aDepartment of Physiology, Academic Medical Center, University of Amsterdam, Room M01-09, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
bExperimental and Molecular Cardiology Group, Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
* Corresponding author. Tel.: +31-20-566-4670; fax: +31-20-691-9319 a.o.verkerk@amc.uva.nl
Received 5 June 2001; accepted 14 September 2001
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Recently, we focussed our research on cellular electrophysiological changes involved in the modulated sinoatrial (SA) node function during heart failure [1] and aging [2]. Heart failure and age-dependent changes of ionic membrane currents, especially the transient outward K+ current (Ito1), are well documented in working myocardium [3,4]. Therefore, we read with interest the paper in Cardiovascular Research by Lei et al. [5], on the characterization of Ito1 in rabbit SA node cells. In their paper, Lei et al. [5] determined (1) the properties of Ito1, (2) the
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