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S (V1) + R (V5 or V6) > 35mm
LVH- most likely ECG presentation
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ST depression and T wave inversion
- Ischemia
- Infarction
- Strain pattern of LVH (increased depol time of thickened LV wall==> endocardium repolarizing in opposite order==> inverter T wave)
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P > 0.12 s (3 small quares)
LAH
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rabbit ears (M shape) P wave
LAH (P mitrale)
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biphasic/ sinusoidal P wave in V1 with negative wave > 1mm
LAH
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Q wave > 0.04s or > 1/3 of R
transmural infarction
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ECG signs in infarct 3-4 days old
ST elevation
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EGC signs in infarct months old
T wave inversion
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ECG signs in infarct years old
Q waves
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loss of R wave
partial thickness infarct
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widespread ST elevation
Pericarditis
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QRS > .12s and RSR pattern in V1 (and right sided leads)
RBBB
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QRS > .12s + RSR pattern in V6 (in left sided leads)
LBBB
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left axis deviation + small q laterall
L anterior hemiblock
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right axis devation + small q inferiorly
L posterior hemiblock
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U wave (after T wave) + long QT
II, III, V4-V6
hypokalemia
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Tall T + smaller P + widened QRS
- severe hyperkalemia
- ==> VT and VFib
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irregularly irregular rhythm
Afib
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no discernable P waves
Afib
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atrial rate ~ 300 BPM with normal V rate
atrial flutter
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saw tooth P waves
A flutter
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PR > 0.2s (or 0.24s)
1st degree AV block
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PR > .20 sec and constant with random QRS drop
mobitz type 2 (BoH)
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progressive PR lengthening followed by dropped beat
Mobitz type 1 (AV block)
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HR= 150-300, no P, ST or T, arrest
VFlutter
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HR= 150-500, chaotic, mutifocal, arrest
VFib
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