Total plasma proANP increases with atrial dilatation in horses.

This research focused on how total plasma proANP, a biological marker of atrial dilatation, increases in horses and can be used as a potential indicator for this condition. The study introduced a new methodology, processing independent analysis (PIA), previously unutilized in equine medicine, and found it to be successful in providing precise measurements.

Methodology

• The researchers aimed to establish a reference interval for equine proANP by using PIA to measure the total proANP product in plasma.
• They also aimed to investigate the proANP concentrations in horses with atrial dilatation.
• Sample stability was also tested by comparing storage at -80°C and -20°C.
• Plasma samples were sourced from 23 healthy horses, 12 horses with moderate or severe valvular regurgitation but without atrial dilatation, and 42 horses with both valvular regurgitation and atrial dilatation.

Results

• The study found that proANP concentration was significantly higher in horses with atrial dilatation than in healthy horses or those with cardiac disease but without atrial dilatation.
• A cut-off value for the detection of atrial dilatation was calculated at 573.8 pmol/l.
• The study also demonstrated that storage of samples at -80°C did not differ significantly from storage at -20°C in terms of their stability.

Conclusion

• The measurement of total proANP in plasma can detect atrial dilatation in horses.
• This technique may prove useful for clinical evaluation in equine medicine, allowing for early detection and better management of cardiac conditions in horses.