Chronic obstructive pulmonary disease anatomical cardiac studies.

This research study analyses the anatomical changes in the hearts of horses suffering from chronic obstructive pulmonary disease (COPD). On comparison with healthy horses, no significant differences were found in right ventricular wall thickness, though there was a notable difference in the ventricular weight ratio. Despite the presence of COPD, horses did not exhibit signs of right heart failure or dilatation.

Study on COPD in Horses

The research was conducted on horses that were clinically diagnosed with chronic obstructive pulmonary disease (COPD). A survey at an abattoir was performed to collect data, which allowed for a comparison between healthy horses and those affected by COPD.

• The horses chosen for the study presented defined physiological and pathological symptoms of COPD, which provided a clear differentiation between the control case (healthy horses) and the subject case (COPD affected horses).
• A total of 17 cases of confirmed COPD were used in this study, promising a sound basis for an in-depth research into the pathological changes caused by the disease in equine hearts.

Anatomical Observations

The study observed the anatomical structures of the horses’ hearts primarily focusing on the right and left ventricles.

• The thickness of the right ventricular wall was analysed. The results showed that there was no significant difference in the wall thickness between COPD affected horses and healthy horses. This finding is useful as it indicates COPD does not impact the structural integrity of the right ventricular wall.
• Another parameter studied was comparing the weight ratio of the left and right ventricles. It was noted that the weight ratio was significantly different in COPD affected horses when compared with healthy horses. This difference was proven to be statistically significant, making this a key finding of the study.

Relation to Heart Failure and Heart Dilatation

Following their findings, the researchers looked into the correlation between COPD and heart failure and dilation.

• Despite the alterations in the ventricular weight ratio, the horses suffering from COPD showed no clinical evidence of right heart failure. This indicates that the weight discrepancy does not significantly affect the heart’s functionality.
• Similarly, there was no post mortem evidence of right heart dilatation among the COPD affected horses. This once again points towards the limited impact of the disease on the overall structure of the heart.

The Role of Pulmonary Hypertension

Finally, the researchers hypothesized that these results might be due to the reversible nature of pulmonary hypertension associated with COPD in horses.

• Pulmonary hypertension often accompanies COPD, causing high blood pressure within the lungs’ arteries. However, it appears that in horses, this hypertension associated with COPD can be reversed, potentially explaining why the COPD affected horses showed such limited anatomical and physiological heart effects in this study.