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    Kapillarisierung des Myokards beim adulten Lama (Lama glama) (2001)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Hünigen, H
    Butendieck, E
    Berg, R
    Quelle
    Berliner und Münchener tierärztliche Wochenschrift; 114 — S. 117–120
    ISSN: 0005-9366
    Kontakt
    Institut für Veterinär-Anatomie

    Koserstr. 20
    14195 Berlin
    Tel.+49 30 838 53555 Fax.+49 30 838-53480
    email:anatomie@vetmed.fu-berlin.de

    Abstract / Zusammenfassung

    The hearts of 12 adult llamas, one female and 11 males, 2-7 years of age, was studied gross-anatomically (absolute and relative heart weight) and microscopic-anatomically (left and right ventricular wall, left auricle). Results showed 9 young animals (2-3 years old), with a significant increase of the absolute heart weight and of the number of capillaries per mm2 and a significant decrease of the intercapillary distance in the left ventricular wall as compared with 3 older llamas (aged 5-7 years old). This results in an increase of the capillarity in the studied heart regions (5.5% compared to 6.9%). The simultaneous increase of the capillary-to-myocyte ratios from 0.9 to 1.1 shows a significant correlation to the cross-sectional area of the myocytes (r=0.79) and an also significant but negative correlation to the number of myocytes per mm2 (r=-0.82). In both groups the cross-sectional area of the myocytes and their diameter differs significantly in the three regions of the heart (left ventricular wall,214 µm2 resp. 17.5 µm; right ventricular wall,156 µm2 resp. 15.5 µm; left auricle, 96 µm2 resp. 11.5 µm). It is suggested that the morphological conditions of the cardiac vascular supply of llamas living at an altitude of 4000 m improve with age.