RVH? (2)
R wave > S wave in V1
S wave > R wave in V6
LAE?
duration > 0.10 s (2.5 blocks)
LVH (3)
deepest S in V1 or V2 + tallest R in V5 or V6 > 35 mm
R in aVL > 11 mm
R in I + S in III > 25 mm
P mitrale?
P wave > 0.10 s in lead II w/ notching
anterior and lateral views of the heart?
V1-V6
base of the heart, atria, great vessels
aVR
lateral wall of the left ventricle
aVL
inferior wall of the left ventricle
aVF
P wave changes in appearance
wandering atrial pacemaker
premature beat where a P wave should be, followed by a noncompensatory pause
PAC
150-250 bpm
P wave can be hidden, PR may be shortened
A tach
120-150 bpm
P waves change in appearance from beat to beat
Multifocal a tachy
tachycardia w/ P waves that can’t be seen
SVT
inverted P wave
PR interval shortened
followed by noncompensatory pause
premature junctional complex
40-60 bpm
inverted P wave
junctional escape rhythm
60-100 bpm
inverted P
accelerated junctional rhythm
100-180 bpm
inverted P
junctional tachycardia
no P wave
wide/bizarre QRS
PVC
20-40 bpm
no P wave
wide QRS
idioventricular rhythm
40-100 bpm
no P
wide QRS
accelerated idioventricular rhythm
100-250 bpm
no P wave
wide QRS
V tach
PR > 0.20 s
delay in conduction at AV node
1st degree heart block
not all P waves followed by QRS
progressively lengthening PR, followed by a lost QRS
2nd degree heart block type 1
more P waves than QRS
prolonged and constant PR interval
2nd degree block type II
no association b/w P waves and QRS
3rd degree block
RAE?
amplitude > 2.5 mm (2.5 blocks)
