I had never heard of
Bounding Heart also called
Bounding Pulse I thought it was a misprint.
Search it a little bit more. Maybe another piece of the AF puzzle.
A bounding pulse is a pulse that feels as though your heart is pounding or racing. Your pulse will probably feel strong and powerful if you have a bounding pulse. Your doctor might refer to your bounding pulse as heart palpitations, which is a term used to describe abnormal fluttering or pounding of the heart.