"Simon needed a [heart] bypass," according to Roger Neal, a spokesman for Simon, Sharon and the Brittany Murphy Foundation. "I was told he needed a bypass, and I said to him, 'Simon, you have so much going on, let's keep you healthy.' I said, 'You want to be healthy. Don't you?' He said yes, but he said, 'The bypass can wait.' "
As for how serious Monjack’s condition was, Neal says, "I don't know how much of an emergency it was. The doctors would have made him get it immediately if he needed it, but Sharon confirmed with me he did need a bypass. They didn’t make it public because he had so much going on."
Monjack's had a history of health issues. In January, his mother, Linda Monjack, told PEOPLE that her son was "unwell” and that he had suffered "a slight heart attack" a week before Brittany’s death.
The firefighters who responded to Sharon Murphy's 911 call Sunday night reported that he may have suffered a heart attack, according to L.A. Assistant Chief Coroner Ed Winter. "We're not sure if it is natural causes or a possible accident," added Winter, "maybe because of the prescription medication found there."
In February, Monjack told PEOPLE that he had survived a battle with oral cancer. (Something of which his mom had claimed to have no knowledge.) He also noted that an anti-seizure medication found at the house at the time of Brittany's death was intended for his use, but she did not elaborate.
"If he had prescription medication, I believe that's all it was," Neal tells PEOPLE. "I don't believe he had an overdose ... As far as empty bottles, I don't know anything about that. If you have a heart condition you're going to have prescription medication for yourself. You're going to be on some kind of medicine."
In addition to planning a trip to Europe with Sharon Murphy, Monjack had been helping to arrange a gala to launch the Brittany Murphy Foundation in September.