The Heart Attack Grill is coming to Las Vegas. That's the burger chain that names its megaburgers after coronary bypass surgery. The quadruple bypass burger has four meat patties and packs an estimated 8,000 calories. Owner Jon Basso claims he is actually warning customers about the dangers of excess eating. Even Basso says that his former spokesman, Blair River, who tipped the scales at 570 pounds, died from obesity. So how does the chain survive? And how seriously can we take the health warnings plastered on all the advertisements. And why does a quadruple burger with all those fries appeal to Americans?