Question for emergency physians?

Question

do you know how cobra venom may cause an irregular pulse?

Answer 1

King Cobra's venom, which is composed mostly of proteins and polypeptides, is produced in specialized salivary glands. The venom is primarily neurotoxic and thus attacks the victim's central nervous system and quickly induces severe pain, blurred vision, vertigo, drowsiness, and paralysis. In the minutes following, cardiovascular collapse occurs, and the victim falls into a coma. Death soon follows due to respiratory failure.

All that to say it attacks the nerves, the nerves have trouble communicating with the heart and voila...erratic heart beat, or no heart beat.