According to Rod Brouhard, of About First Aid, Snake bites can be deadly. It's important to react quickly to bites. If emergency medical services can be reached, request help through 911. If in a remote area, getting the victim to medical care is vital. North America is home to several different species of venomous snakes. The most common is the rattlesnake. Antivenom is available, but it must be used as early as possible. And, here's what to do.
Here's another article on rattlesnake bites.
Photo Credit: Elizabeth R. Rose - Note: Don't try this at home kids... it's a fake snake!