Electrical conditioning of in situ skeletal muscle for replacement of myocardium

J. A. Macoviak*, L. W. Stephenson, F. Armenti, A. M. Kelly, A. Alavi, T. Mackler, James Lewis Cox, G. Palatianos, L. H. Edmunds

*Corresponding author for this work

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

Eight canine right hemidiaphragms were electrically stimulated at 2Hz (N = 3) and 10 Hz (N = 5) for up to 135 days. ATPase histochemical studies showed nearly total transformation of type II fast twitch fatigable muscle fibers to type I slow twitch fatigue resistant muscle fibers. The thickness and vascular perfusion of the stimulated muscle increased significantly. Electrical thresholds remained unchanged. The muscle contracted vigorously and without fatigue for up to 135 days at 10 Hz stimulation. Electrical conditioning of canine diaphragm skeletal muscle at 10 Hz frequency for 5 weeks results in a 95% and greater population of slow twitch fatigue resistant muscle fibers. This change in diaphragmatic skeletal muscle should make it a more suitable autograft for replacement or augmentation of diseased cardiac muscle.

Original languageEnglish (US)
Pages (from-to)429-439
Number of pages11
JournalJournal of Surgical Research
Volume32
Issue number5
DOIs
StatePublished - May 1982

ASJC Scopus subject areas

  • Surgery

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    Macoviak, J. A., Stephenson, L. W., Armenti, F., Kelly, A. M., Alavi, A., Mackler, T., Cox, J. L., Palatianos, G., & Edmunds, L. H. (1982). Electrical conditioning of in situ skeletal muscle for replacement of myocardium. Journal of Surgical Research, 32(5), 429-439. https://doi.org/10.1016/0022-4804(82)90123-8