Extracellular Structures in Heart Muscle

  • Thomas F. Robinson
  • Leona Cohen-Gould
  • Renee M. Remily
  • Joseph M. Capasso
  • Stephen M. Factor
Part of the Advances in Myocardiology book series (ADMY)

Abstract

The extracellular matrix of heart muscle contains a considerable variety of structures. We have systematically studied the morphology of these structures using several methods of fixation and microscopy. Endomysial connections between cells are comprised of struts of collagen [1] as well as combinations of elastin fibers, collagen fibers, and microfibrils. The rest of the extracellular matrix is filled with a polyanionic lattice of unit collagen fibrils, microthreads, and granules. In the course of these investigations, we have observed regions of structural continuity across the sarcolemma, from endomysial collagen struts to Z-bands. We have also correlated the mechanical resistance to stretch with orientation of epimysial collagen fibers and sarcomere lengths in living as well as fixed rat papillary muscles. Our observations suggest that the extracellular skeletal framework plays an important role in normal cardiac function.

Keywords

Collagen Fiber Papillary Muscle Collagen Fibril Heart Muscle Muscle Length 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1985

Authors and Affiliations

  • Thomas F. Robinson
    • 1
  • Leona Cohen-Gould
    • 2
  • Renee M. Remily
    • 2
  • Joseph M. Capasso
    • 2
  • Stephen M. Factor
    • 3
  1. 1.Cardiovascular Center, Department of Medicine and Department of Physiology and BiophysicsAlbert Einstein College of MedicineBronxUSA
  2. 2.Cardiovascular Center, Department of MedicineAlbert Einstein College of MedicineBronxUSA
  3. 3.Department of PathologyAlbert Einstein College of MedicineBronxUSA

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