Definition of primary and secondary amenorrhea. Amenorrhea is the medical term for the absence of menstrual periods, either on a permanent or temporary basis. Amenorrhea can be classified as primary or secondary.
Most inherited bleeding disorders are the result of abnormal platelet function or a deficiency in one or more of the factors involved in the blood clotting system. The most serious and common inherited coagulation disorders in dogs are hemophilia(deficiency of factor VIII or IX) and von Willebrand's disease (lack of von Willebrand factor). Other coagulation disorders are discussed here.
Mitral Valve Disease in Dogs. Mitral valve disease (MVD) is the most common cause of heart disease in dogs, and is most commonly seen in small breed dogs.It is caused by a leaky valve in the heart, which worsens over time, and can result in heart failure.avalier King Charles Spaniels have a particularly high prevalence of mitral valve disease, which is thought to be genetic. Approximately one third of small-breed dogs older than 10 years of age are affected.