Abstract
Basic mechanical properties observed during cardiac hypertrophy were studied in left ventricular rat papillary muscles after exposure to chronic pressure and/or volume overloading. It is always possible, during such overloading conditions, to define the level of contractility in terms of a force-velocity-length (F-V-L) relationship regardless of time and initial length. Thus, during a determined period of the contraction phase and for a given total load, shortening velocity remained an univocal time-invariant function of shortening length, involving a time-independent maximum intensity of activation. The onset of this precise phase was reached relatively soon after stimulus. The time-independent F-V-L relation was observed both in controls and in hypertrophied heart muscles, whatever the degree and the type of induced hypertrophy, and even during the latest phases of congestive heart failure.
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Lecarpentier, Y., Gastineau, P., Hatt, P.Y., Martin, J.L. (1983). Force-Velocity-Length Relationship during Cardiac Hypertrophy. In: Chazov, E., Saks, V., Rona, G. (eds) Advances in Myocardiology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-4441-5_6
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DOI: https://doi.org/10.1007/978-1-4757-4441-5_6
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