What does RR stand for?
RR stands for "R-to-R Interval"
How to abbreviate "R-to-R Interval"?
"R-to-R Interval" can be abbreviated as RR
What is the meaning of RR abbreviation?
The meaning of RR abbreviation is "R-to-R Interval"
What does RR mean?
RR as abbreviation means "R-to-R Interval"
