HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Davies, P Articles by Ward, R Search for Related Content PubMed PubMed Citation Articles by Davies, P Articles by Ward, R

The length-tension relationship and the effect of paired electrical stimulation were studied in right ventricular papillary muscles obtained from cats. The animals were divided into three age groups: neonatal kittens, less than 24 hr of age; infant kittens, 16--18 days of age; and adult cats. 2. The muscles were electrically driven to contract isometrically using field stimulation at 10--20% above the threshold valus. 3. At Lmax the neonatal preparations produced significantly less developed (active) tension than did the adult preparations. The resting tension at Lmax was significantly greater in the neonatal preparations than in the adult ones. The infant group occupied an intermediate position between the two other groups. 4. The response to paired electrical stimulation was less in the neonatal group than in either the infants or the adults. 5. It is concluded that post-natal developmental changes occur in the contractile properties of the myocardium of the cat.

This article has been cited by other articles:

				J. S. Walker and P. P. de Tombe Titin and the Developing Heart Circ. Res., April 16, 2004; 94(7): 860 - 862. [Full Text] [PDF]

				S. Lahmers, Y. Wu, D. R. Call, S. Labeit, and H. Granzier Developmental Control of Titin Isoform Expression and Passive Stiffness in Fetal and Neonatal Myocardium Circ. Res., March 5, 2004; 94(4): 505 - 513. [Abstract] [Full Text] [PDF]

				L. Protas and R. B. Robinson Neuropeptide Y contributes to innervation-dependent increase in ICa,L via ventricular Y2 receptors Am J Physiol Heart Circ Physiol, September 1, 1999; 277(3): H940 - H946. [Abstract] [Full Text] [PDF]

				T. Ohtsuka, V. A. Browne, and R. D. Gilbert Oxygen Dose-Response Curve of Cardiac Papillary Muscle From Fetal and Nonpregnant Adult Sheep Exposed to Long-Term, High-Altitude Hypoxemia Reproductive Sciences, July 1, 1997; 4(4): 197 - 202. [Abstract] [PDF]