EKG Rhythms
- 1 SMALL square (1mm) = 0.04 sec (40ms)
- 5 SMALL squares (5mm) = 1 LARGE square = 0.2 sec
Blocks
1st Degree
- P and Q prolonged (>0.2ms = one large square)
2nd Degree
Type I
- P and Q get further and further away until QRS drops then resets
Type II
- P and Q same distance but the QRS randomly drops
3rd Degree
- P and Q don't match. Each on their own rhythm