Heart Failure Support Group
Heart failure is a condition that can result from any structural or functional cardiac disorder that impairs the ability of the heart to fill with or pump a sufficient amount of blood throughout the body. It is often undiagnosed due to a lack of a universally agreed definition and difficulties in diagnosis, particularly when the condition is considered "mild."

Singing is a sign of the state of you whole psychy. In tune or out if tune your psychy needs tweaking after a respite from the norm. You soul seems happy. Prayers to you for sharing that.
Best Regards,
Just Joe
What were you singing by the way? Music is my release, I love to sing out loud and very loud, I am pretty sure no one else, within ear shot, enjoys it as much as I do!!
Every time i sing (and someone hears) someone tells me to please stop singing.
Hugs