QRS narrow
rhythm regular
P before every QRS
PR interval lengthening until you miss a beat
P is right side up
2nd Degree Type 1
QRS narrow
rhythm regular
3 Ps before every QRS
PR interval <0.2
Ps are right side up
HR=72
Atrial Flutter
QRS wide
rhythm regular
no Ps
none
none
HR=28
Idioventricular
QRS narrow
rhythm regular
P before every QRS
PR interval <0.2
P is upside down
HR=52
Junctional
QRS narrow
rhythm regular
P before every QRS
PR interval <0.2 until you miss a beat or more
P is right side up
2nd Degree Type 2
QRS narrow
rhythm regular
P before every QRS
PR interval <0.2
P is absent
HR=72
Accelerated Junctional
QRS narrow
rhythm regular
P before every QRS
PR interval <0.2
P is absent
HR=32
Junctional Escape/Bradycarcia
QRS narrow
rhythm regular (but there is one early beat)
P before every QRS
PR interval <0.2
P is right side up except the early beat where the QRS is wide
HR=72
NSR with a Premature Ventricular Contraction
QRS narrow
rhythm irregular
P before every QRS
PR interval <0.2
P is right side up
Atrial Fib
QRS narrow
rhythm regular
P before every QRS
PR interval <0.2
P is right side up
hr>100