Patrick Muldoon's sister has shared his heartbreaking final hours. The Saved By The Bell star is believed to have suffered a heart attack, with his girlfriend, producer Miriam Rothbart, finding him dead on their bathroom floor, aged just 57. The news of Muldoon's death came as a complete shock to his family, as just hours before, he and Miriam had been enjoying a night out at the new Los Angeles County Museum of Art, with the late star being "happy as can be". Now, Patrick's devastated sister,