Pray it is a dry bite!!! If not, keep the heart above the bite sight, that way gravity works with you to pool the venom so that it takes longer to spread. No ice packs, no turniquit, never tried to cut between the fang marks and then suck out the venom. Best thing sit tight, and call for help, or send someone to get help. Ultimate treatment is found in the ER. Last I herd most adults that die from rattle snake bites do so from Sepsis (big word for infection), or allergic reactions.