Patton Oswalt shares the cause of wife Michelle McNamara's death

Comedian, actor, and nerd, Patton Oswalt shared his grief with the world last year when his wife Michelle McNamara died. Patton revealed on Friday that the medical causes of her resulted from a combination of prescription medications and a heart problem that had not been diagosed. Los Angeles coroner officials informed him earlier today.

Oswalt wrote in a statement to The Associated Press that he and his wife Michelle McNamara had no idea she had a condition that caused blockages in her arteries.

"We learned today the combination of drugs in Michelle's system, along with a condition we were unaware of, proved lethal," Oswalt said.

The blockages, combined with her taking the medications Adderall, Xanax and the pain medication fentanyl, caused his wife's death in April 2016, Oswalt said in the statement sent via his publicist.

Los Angeles coroner's Lt. David Smith said McNamara's cause of death remains listed as pending.

More at AP/THR.

[PHOTO: Michelle McNamara and Patton Oswalt. Jason LaVeris/FilmMagic via THR]