Studies have shown that around 75% of horses that have undergone surgery will be discharged, but the long term survival following surgery varies from 38% to 50%. The prognosis is more favourable if surgery is performed before signs of cardiovascular compromise have occurred. | Studies have shown that around 75% of horses that have undergone surgery will be discharged, but the long term survival following surgery varies from 38% to 50%. The prognosis is more favourable if surgery is performed before signs of cardiovascular compromise have occurred. |