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19 Cards in this Set

  • Front
  • Back
Einthoven's triangle
Limb leads definition of the frontal axis
Algorithm
Sinus Rhythm? + P wave in II
Rate (btwn 30-100?)
QRS Axis (btwn -30-90?)
PR, QRS, QT intervals
Atrial Enlargement?
QRS Morphology - BBB?, MI?, hypertrophy?
AV conduction
ST Segments
Precordial leads
Leads V1-V6 defining the transverse plane
V1-R PS 4th ICS
V2-L PS 4th ICS
V3-btwn V2 & V4
V4-L MC 5th ICS
V5-L AA 5th ICS
V6-L MA 6th ICS
PR interval
Beginning of P wave to beginning of QRS complex. Represents the time required to activate the atria and conduct through the AV node & His-Purkinje network. Normal btwn 0.12-0.2 sec
QRS complex
Total duration of ventricular depolarization
ST segment
Time measured from the end of the QRS complex to the beginning of the T wave
P wave
Represents atrial depolarization. + P wave in II represents sinus rhythm
QT interval
Measures cardiac repolarization. normal < 0.4-0.45 sec
L Axis Deviation
< -30 degree axis
R Axis Deviation
> +90 degree axis
RA enlargement
pulm, RV, or TV disease
enlarged P wave in II
increased + deflection in V1
LA enlargement
LV or MV disease
lengthened P wave in II
increased - deflection in V1
RV hypertrophy
V1 R wave > 7mm or R/S > 1
QRS < 0.12 sec
R axis deviation
V1/2 ST-T abnormalities
LV hypertrophy
V1 S wave + V5/V6 S wave > 35mm
aVL R wave ? 11mm
I R wave + III S wave > 25mm
RBBB
V1 rSR'
terminal S wave in I and V6
QRS > 0.12 sec
LBBB
V1 rS or QS
I broad notched R wave
aVL & V6 QRS > 0.12 sec
ST-T abnormalities in I, aVL, V6
ST-T wave abnormalities
repolarization abnormalities
RVH, RBBB seen in V1 & V2
LVH, LBBB seen in I, aVL, V5, V6
MI
Transmural - increased T wave amp followed by ST elevation, R wave diminished, Q wave exaggeration, T wave inversion, ST back to baseline
Subendocardial - ST depression, T wave inversion nonSTEMI
Hyperacute T wave
1st sign of an MI