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.
For this article, we will concentrate on the two most common causes of CHF in dogs: Degenerative valvular disease (DVD) and Dilated cardiomyopathy (DCM). Degenerative valvular disease is a condition that reduces the ability of the heart valves to prevent the back-flow of blood during ventricular contraction.