Johnathan Southworth "John" Ritter still cannot rest in peace more than four years after his early demise. His relatives are taking their $67 million lawsuit to trial Tuesday. They are disputing his medical treatment and claim the actor would have survived if two doctors had recognized his heart abnormality instead of administering Ritter treatment for heart attack.

On September 11, 2003, Ritter collapsed while rehearsing scenes for an episode of 8 Simple Rules and was taken across the street from the studio to Providence Saint Joseph Medical Center, where he was also born. There he died hours later of an aortic dissection caused by a previously undiagnosed congenital heart defect. After Ritter’s death, his older brother, Tommy, was diagnosed with the same condition.

He is survived by his wife actress Amy Yasbeck and their daughter, Stella. His family is not content with $14 million in settlements with nine other medical entities, including the hospital where he died. The two doctors targeted are radiologist Matthew Lotysch and cardiologist Joseph Lee.

Radiologist Matthew Lotysch had performed a full-body scan on Ritter in 2001 and did not notice the congenital heart defect. The lawsuit says that the enlarged aorta should have been noticeable with proper attention from the doctor's part. However, the radiologist found calcifications in all of Ritter's coronary arteries and told him to follow up with a cardiologist, which Ritter did not do.

“I really, really believe that for whatever reason, John Ritter’s time was up,” Stephen C. Fraser, Lotysch’s lawyer, told the Los Angeles Times.

The second doctor targeted by the lawsuit is cardiologist Joseph Lee, who treated him at the emergency room at Providence St. Joseph Medical Center in Burbank. Dr. Lee pointed out that Ritter had symptoms consistent with a heart attack, which required him to treat accordingly and in a speedy manner.

“John didn’t have a chance,” his wife Amy Yasbeck told Vieira. “He was never given that chance.”

A chest X-ray was ordered by emergency room staff but, inexplicably, was never performed. Aortic dissection is actually a tear in the wall of the aorta. It causes blood to flow between the layers of the wall of the aorta and force the layers apart, often leading quickly to death. Around 80 percent of patients die, with 50 percent of them dead before they reach the hospital.

John Ritter was best known for his role of Jack Tripper in the sitcom Three's Company. He won the Outstanding Lead Actor in a Comedy Series for this role, in 1984, for which he also won a Golden Globe for Best Performance by an Actor in a TV-Series - Comedy/Musical the same year.