Ver el código de «Pathologic Q waves»

==Evaluation==
[[File:SinusRhythmLabels.svg|thumb]]
[[File:PathoQ.png|thumb|Pathologic Q wave]]
*Significant if >1 box wide or if is 1/3 of entire QRS amplitude
*Early Repolarization:
**[[ST Elevation]] most prominent in lat precord leads (V4-6) but no reciprocal changs
**T waves usually broad, tall (>5mm) & upright
**Limb leads may also have ST elevation, rarely >2 mm

===Details===
*Q waves do not always indicate infarction
*Must distinguish normal septal q waves from pathologic Q waves: 
**Normal septal q wave: <0.04s, low amplitude 
**Abnormal septal q wave: >0.04s in I OR in II, III, AND aVF OR V3, V4, V5, AND V6 
*Q-wave equivalents in the precordial leads: 
**R-wave diminution or poor R-wave progression 
**Reverse R-wave progression (R waves increase then decrease in amplitude) 
***Must distinguish from lead misplacement 
**Tall R waves in V1, V2 (representing "Q waves" from posterior infarction)

==Differential Diagnosis==
===Q Wave (Pathologic)===
*[[Pathologic Q waves]] (Ischemic) 
*[[LBBB]] 
*[[LVH]]
*Chronic lung disease 
*[[Hypertrophic cardiomyopathy]] 
*[[Dilated cardiomyopathy]]

==See Also==
*[[ECG Basics]]

[[Category:Cardiology]]