big box
10mm
small box
1mm
small box sec
.04 sec
big box sec
.20 sec
Heart rate measured by
EKG
Pulse measured by
Pulse oxymeter
HR but no pulse can be from
overdose of anesthetic agents
1 large box
300bpm
2 large boxes
150bpm
3 large boxes
100bpm
4 large boxes
75bpm
R-R
Ventricular Rhythm
P-P interval
atrial rhythm
Big Box Estimation Equation
300/# boxes