Could someone die from a broken heart? Lisa Marie Presley, may God rest her soul, lost her son, Benjamin, in 2020. He took a gun, put it inside his mouth, and then pulled the trigger.
Benjamin Keough was 27. Lisa Marie Presley (54) blamed herself for his death.

I'm no doctor and I've got no inside information, but from personal experience, I know first hand that anxiety & depression can compromise your immune system.

We lost Dave Guard in 1992 at the age of 56, from lymphoma cancer. I'm not saying leaving The Kingston Trio killed Dave Guard; but it's a known fact he regretted that decision,
and ended up living with the Shaw Brothers in Rollinsford, New Hampshire. Dave Guard became destitute. Imagine, the one time acknowledged leader of the great Kingston Trio becoming destitute!

Depression and blaming yourself for bad decisions and/or becoming dependant on drugs (cocaine?) can compromise your immune system and affect your physical health. Doesn't matter the age.
If not mistaken, Lisa Marie Presley spent a lot of time going to rehab.