Rattlesnake bite: A poisonous bite by a member of the pit viper family. All rattlesnakes are venomous and secrete poisonous venom. Rattlesnakes are the main cause of death from snake bites in the United States.
The emergency treatment of rattlesnake bites is essential. With proper care, rattlesnake bites are rarely fatal. Do not use a tourniquet or bandage and do not attempt to suction out the wound by mouth. The affected part should be kept immobile and, if possible, below the level of the heart. Take the person with the bite immediately to the nearest hospital.