[Vocabulary] meaning of the words

[saghi144]

Hello;
would you explain the words in red please?
Heart leaders pay it back
I was still under heavy medication for pain and drifted in and out of sleep without knowing it.
Thank you so much.
Saghi

 

[bhaisahab]

Hello;
would you explain the words in red please?
Heart leaders pay it back
I was still under heavy medication for pain and drifted in and out of sleep without knowing it.
Thank you so much.
Saghi

Which of the words in red do you not understand?

 

[Barb_D]

I need to say that "heart leaders pay it back" is meaningless to me.

 

[SoothingDave]

I need to say that "heart leaders pay it back" is meaningless to me.

Heart (band) - Wikipedia, the free encyclopedia

I assume it's about Ann and Nancy Wilson.

 

[5jj]

It appears to be the title of a chapter in this book.