Cardiovascular parameters in emphysematous and control horses.

The study examines the cardiovascular effects of chronic pulmonary emphysema in horses, finding significant differences in heart rates, vascular resistance, blood pressure, and stroke volume compared to healthy animals.

Research Context

• The research focuses on horses exhibiting clinical signs of chronic pulmonary emphysema, a condition causing shortness of breath due to over-inflation of the lung’s air sacs.
• Two groups of horses were involved in the study – one group with the chronic condition (emphysematous horses) and another group of healthy or control horses.

Key Findings

• It was discovered that emphysematous horses have heart rates, total peripheral vascular resistance, pulmonary vascular resistance and mean pulmonary artery blood pressure significantly higher than healthy horses.
• Additionally, emphysematous horses showed significant reduction in central blood volume, stroke volume, stroke index, and left ventricular work which are key cardiovascular parameters.
• The cardiac output was also significantly lower in horses with chronic pulmonary emphysema compared to the control group.

Other Observations

• No significant differences were found in arterial or right ventricular blood pressures between the diseased and the healthy horses.
• The study also observed variable values among the diseased group, suggesting these might depend on the degree and extent of the lung disease present in each horse.

Conclusion

• This study provides important insight into the cardiovascular implications of chronic pulmonary emphysema in horses, demonstrating significant deviations in key cardiovascular parameters compared to healthy animals.
• The results underscore the gravity of the condition and its potential impact on the functionality and well-being of the affected horses.