Alterations of physiology and biochemistry whereby the cause exerts a lethal effect. Mechanisms of death are never etiologically specific and are unacceptable as substitutes for the underlying cause of death. Common fatal mechanisms of death include congestive heart failure, cardiac arrhythmias, septicemia, disseminated intravascular coagulation, hepatic failure and anoxic encephalopathy. (ifs.harriscountytx.gov)