Athletic heart syndrome in dogs competing in a long-distance sled race.

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  • Additional Information
    • Source:
      Publisher: American Physiological Society Country of Publication: United States NLM ID: 8502536 Publication Model: Print Cited Medium: Print ISSN: 8750-7587 (Print) Linking ISSN: 01617567 NLM ISO Abbreviation: J Appl Physiol (1985) Subsets: MEDLINE
    • Publication Information:
      Original Publication: Bethesda, MD : American Physiological Society, c1985-
    • Subject Terms:
      Physical Conditioning, Animal*; Cardiomegaly/*veterinary ; Dog Diseases/*physiopathology ; Heart Murmurs/*veterinary ; Physical Endurance/*physiology; Animals ; Cardiomegaly/physiopathology ; Cold Temperature ; Dogs ; Electrocardiography ; Heart Auscultation/veterinary ; Heart Rate/physiology
    • Abstract:
      The cardiac effects of endurance training were evaluated by cardiac auscultation and electrocardiographic examination of 48 heavily trained sled dogs (3,000-5,000 km of training), 18 lightly trained sled dogs (300-800 km of training), 19 untrained sled dogs, and 14 mongrel dogs. A grade I-II/VI early- to midsystolic cardiac murmur was auscultated with increasing frequency as training level increased. The QRS duration (66.1 +/- 7.4 ms) and QT interval (236 +/- 20 ms) were significantly (P < 0.05) longer in heavily trained sled dogs than in mongrel dogs (QRS, 60.6 +/- 4.6; QT, 219 +/- 11 ms). A long QT interval (> 250 ms) was observed in 8 (16.7%) heavily trained dogs but not in the other groups. A significant rightward shift in the mean electrical axis of ventricular depolarization in the frontal plane was observed in heavily trained sled dogs. The auscultatory and electrocardiographic findings in heavily trained sled dogs were remarkably similar to those reported in elite human endurance athletes, suggesting that endurance-trained sled dogs provide a naturally occurring model for the athletic heart syndrome.
    • Publication Date:
      Date Created: 19940101 Date Completed: 19940606 Latest Revision: 20171213
    • Publication Date:
      20231215
    • Accession Number:
      10.1152/jappl.1994.76.1.433
    • Accession Number:
      8175541