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Physiologic and electrocardiographic changes occurring in broilers reared at simulated high altitude
R L Owen1, R F Wideman, R M Leach
1Department of Veterinary Science, Pennsylvania State University, University Park 16802, USA.
Avian Diseases
|January 1, 1995
Summary
Electrocardiograms (EKGs) can help predict ascites in broilers raised at high altitudes. Significant EKG changes, like increased S wave amplitude, were observed in affected birds by day 14.
Area of Science:
- Veterinary Medicine
- Animal Physiology
- Avian Health
Background:
- Ascites syndrome is a significant concern in broiler production, particularly under high-altitude conditions.
- Early detection of ascites is crucial for effective management and reducing economic losses in poultry farming.
Purpose of the Study:
- To investigate the potential of electrocardiograms (EKGs) for predicting ascites in broilers reared at simulated high altitude.
- To identify specific EKG parameters that correlate with the development of ascites.
Main Methods:
- Three replicate experiments were conducted with 100 broilers each, reared at 3000 meters simulated altitude or ambient pressure.
- EKGs (Leads I, II, III) were recorded on days 0, 14, 28, and 42.
- Packed cell volume and body weight were also measured.
Main Results:
- On days 14 and 28, broilers developing ascites showed significantly higher S wave amplitude and QRS complex amplitude compared to controls.
- Birds at simulated high altitude consistently had higher packed cell volumes.
- Ascites group birds exhibited significantly lower body weight from day 14 onwards.
Conclusions:
- EKG parameters, specifically increased S wave and QRS complex amplitudes, show promise for early prediction of ascites in high-altitude reared broilers.
- Elevated packed cell volume and reduced body weight are also indicators associated with ascites development under these conditions.