This is all I have. It is part of a package that my gf (in Primary Care Paramedic school) got for ECG interpretation teaching. They are calling it A-Fib.... I disagree. There is no 12-lead, no other leads, no history. What you see is what is given.
I don't call it A-Fib.
Every block of 4 beats the first 3 have identical R-R to each other then the fourth is delayed, perhaps an escape beat.
I don't know what to call it but it isn't A-Fib