Pathological examination of the heart should be performed as part of a complete post-mortem (PM) examination. The changes seen at PM in horses with heart disease are usually relatively minor in comparison with other species and are frequently missed unless the examiner has a detailed appreciation of the normal and abnormal features of valves and myocardium. Care should also be taken in interpreting the significance of abnormalities detected at PM. For example, mild degenerative valvular changes are unlikely to be responsible for the sudden death of an animal, even if this is the only abnormality detected at PM.
2.4.1 Gross post-mortem examination of the heart
2.4.2 Histological examination
2.4.3 Valvular changes
2.4.4 Myocardial changes