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The mechanism and significance of the slow changes of ventricular action potential duration following a change of heart rate
Author(s) -
Eisner D. A.,
Dibb K. M.,
Trafford A. W.
Publication year - 2009
Publication title -
experimental physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 101
eISSN - 1469-445X
pISSN - 0958-0670
DOI - 10.1113/expphysiol.2008.044008
Subject(s) - medicine , duration (music) , cardiology , kinetics , heart rate , chemistry , blood pressure , physics , quantum mechanics , acoustics
This article reviews the effects of changes of heart rate on the ventricular action potential duration. These can be divided into short term (fractions of a second), resulting from the kinetics of recovery of membrane currents, through to long term (up to days), resulting from changes of protein expression. We concentrate on the medium‐term changes (time course of the order of 100 s). These medium‐term changes occur in isolated tissues and in the intact human heart. They may protect against cardiac arrhythmias. Finally, we discuss the cellular mechanisms responsible for these changes.