⇧
☰
×
ECG
steps
⇲
1 | rate
2 | rhythm
3 | axis
4 | intervals
5 | p waves
6 | qrs complexes
7 | st segments
8 | t waves
specific diagnoses
⇲
acquired long qt
amiodarone toxicity
arvc/d
calcium imbalance
cardiac amyloidosis
cardiac arrest
chronic lung disease
dextrocardia
digitalis toxicity
hypertrophic cardiomyopathy
hypothermia
intracranial hemorrhage
magnesium imbalance
myocardial ischemia-infarct
localization of mi
anterior mi
inferior mi
lateral mi
posterior mi
right ventricular mi
paced rhythm
pacing modes
asynchronous pacing
single-chamber pacing
dual-chamber pacing
pericardial disease
potassium imbalance
pulmonary embolism
shock rhythm
mechanism
⇲
block
ectopy
premature
escape
tachycardia-induced ectopy
reentry
afterdepolarization
sinus
⇲
sinus node dysfunction
sinus tachycardia
atrial
⇲
premature atrial beat
atrial escape beat
atrial tachycardia
atrial flutter
atrial fibrillation
junctional
⇲
av node dysfunction
premature junctional beat
junctional escape beat
junctional tachycardia
avrt
avnrt
ventricular
⇲
bundle branch block
fascicular block
premature ventricular beat
ventricular escape beat
ventricular tachycardia
VT vs SVT
idiopathic VT
polymorphic VT
ventricular fibrillation
inherited
⇲
brugada
cpvt
early repolarization
lown-ganong-levine
long qt
short qt
wolff-parkinson-white
algorithms
⇲
arrhythmia
tachyarrhythmia
bradyarrhythmia
md doodle home
diagnosis & management
lab
cardiology
index
INTERVALS
p waves ⇢
⇠ axis
Are they normal, prolonged, or shortened ?
Prolonged PR
PR > 200ms or > 1 big box
e.g.
AV block
,
hypermagnesemia
,
hyperkalemia
Shortened PR
PR < 120ms or < 3 small boxes
e.g.
Wolff-Parkinson White syndrome
,
Long-Ganong-Levine syndrome
Widened QRS
QRS > 120ms or > 3 small boxes
e.g. any aberrant
ventricular
beat,
bundle branch block
,
intraventricular conduction delay
Narrow (normal) QRS
QRS ≤ 120ms or ≤ 3 small boxes
e.g. any beat conducted down the His-bundle branch-Purkinje system
Prolonged QT
QT > 1/2 of RR’ or > 460ms
e.g.
inherited
or
acquired long QT syndrome
,
hypokalemia
,
hypomagnesemia
,
hypocalcemia
,
ICH
Shortened QT
QT < 360ms
e.g.
short QT syndrome
,
hypercalcemia
,
hypothermia
p waves ⇢
⇠ axis
related topics
av block
wolff-parkinson-white
long qt syndrome
ecg home page
magnesium imbalance
potassium imbalance
specific diagnoses