Research in Experimental Medicine

, Volume 183, Issue 2, pp 111–115 | Cite as

Response of the left ventricular connective tissue to hypoxia

  • A. Genovese
  • S. Latte
  • M. Bozzaotre
  • M. Chiariello
Original Papers

Summary

The collagen content (measured as myocardial concentration of hydroxyproline) and dry weight (expressed as ventricle weight to body weight ratio) were determined in the left ventricle of male Sprague-Dawley rats (200–220 g b.wt.) exposed to a simulated altitude of 7,000 m for 18 h a day for 10 days in a hypobaric chamber. Hypoxia resulted in a significant increase (P<0.001) in the mass of the left ventricle with a concomitant significantly increased collagen concentration (P<0.001). The data indicate that hypoxia effects the synthesis of a significant amount of connective tissue in the left ventricle, which is the ventricle not exposed to pressure load.

These results may be related to clinical, hemodynamic, and pathologic observations showing the left ventricular dysfunction in patients with chronic respiratory insufficiency. Since the amount of collagen in the left ventricle might interfere with ventricular contractile function, it is suggested that the hypoxia in these patients could affect the left ventricular myocardium via a direct action on the connective metabolism.

Key words

Hypoxia Left ventricle Connective metabolism 

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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • A. Genovese
    • 1
  • S. Latte
    • 1
  • M. Bozzaotre
    • 1
  • M. Chiariello
    • 1
  1. 1.Dept. of Medicine, II School of MedicineUniversity of NaplesNaplesItaly

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