Locoweed (Oxytropis sericea), when fed to calves at high elevations, increased the prevalence and severity of congestive heart failure. Forced exercise did not increase the prevalence of congestive heart failure, but it did increase severity. Calves consuming locoweed at high elevations developed
In field observations of young cattle grazing on certain high-altitude ranges infested with the locoweed Oxytropis sericea, a high frequency of clinical congestive right ventricular failure was identified. At necropsy of affected calves, there were right ventricular hypertrophy and dilation,
All calves fed locoweed (green and dry Oxytropis sericea Nutt and dry Astragalus lentiginosus Dougl) at high elevation developed clinical signs, gross and microscopic lesions of congestive right heart failure. Clinical signs and microscopic lesions of locoweed intoxication were also evident. Control
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