Does Zoloft really affect the heart rythem?

Meagan

I've been on Zoloft 50mg up until yesterday my doctor put me on Zoloft 100mg. I read on the internet that Zoloft can affect the heart rhythm and make it flutter. Is that true?

Also this isn't containing to Zoloft ,but I know someone who just recently passed away from an heart attack sudden. She was in her 30s. They are doing autopsy to see what happen.

How can someone so young have an sudden heart attack with or without heart problems?