1969
DOI: 10.1111/j.1748-1716.1969.tb04466.x
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The Dynamics of the Inotropic Change Produced by Altered Pacing of Rabbit Papillary Muscle

Abstract: The time course of the active state, the force‐velocity relationship and the series compliance of rabbit papillary muscles were studied at different inotropic states produced by altered pacing of the muscles within the range 18 to 72 stimulations per minute. The inotropic intervention produced a shift of the force‐velocity curve, without markedly changing the shape of the curve, suggesting that Vmax, the capacity to produce motion, and Pmax the capacity to produce tension, were affected to the same degree. Int… Show more

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Cited by 21 publications
(15 citation statements)
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“…(2) is also valid for the case of non-isotonically (i.e. approximately isometrically) contracting muscle, as in the present study [8][9][10]21]. Note that for VcE = 0: F = Fo.…”
Section: Methodsmentioning
confidence: 68%
“…(2) is also valid for the case of non-isotonically (i.e. approximately isometrically) contracting muscle, as in the present study [8][9][10]21]. Note that for VcE = 0: F = Fo.…”
Section: Methodsmentioning
confidence: 68%
“…The parallel shift of V,,.,x and P,, produced by altered stimulation frequency has been demonstrated previously (5). Figure 3 Data from project by Mattiazzi, Nilsson, and Edman. that adrenaline has the same effect on the force-velocity curve as induced by altered stimulation rate.…”
Section: Edman the Instantaneous 5orce-velocity Relationshipmentioning
confidence: 75%
“…By repeating the release procedure with different loads it is possible to collect force-velocity data at a given time, for instance at the moment of the peak of the isometric twitch. Such data form, without exception, a hyperbolic curve of the same general shape as is obtained in skeletal muscle (4,5,6,12). The data points obtained in this way also represent, to within 1-2 %, the same length of the muscle unit.…”
Section: Discussionmentioning
confidence: 92%
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