Execution by electrocution (usually referred to as the electric chair or simply the chair after its method of implementation) is an execution method originating in the United States in which the person being put to death is strapped to a specially built wooden chair and electrocuted through electrodes placed on the body. This execution method has been used only in the United States and, for a period of several decades, in the Philippines (its first use there in 1924, last in 1976). The electric chair has become a symbol of the death penalty; however, its use is in decline. Historically, once the person was attached to the chair, various cycles (differing in voltage and duration) of alternating current would be passed through the condemned's body, in order to fatally damage the internal organs (including the brain). The first jolt of electrical current was designed to cause immediate unconsciousness and brain death; the second one was designed to cause fatal damage to the vital organs. Death was frequently caused by electrical overstimulation of the heart.