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[Cardiac valve diseases: morphological characteristics and differential diagnosis].

Macroscopic, organometric, histological, cytological, and immunohistochemical studies and polymerase chain reaction using a statistical analysis have revealed that the most informative morphological signs for the differential diagnosis of cardiac valve diseases were identified, by using the material involving 1326 valves from the patients operated on and 221 hearts from patients who had died from cardiac defects, and 30 hearts from patients with coronary heart disease (a control group).