* Normally found in leads: I, AVL, V6, (V5); - Normal if < 1/2 mm wide or < 0.025 sec; - Do to Septal depolarization; - Ignore Q waves in AVR; * Pathologic Q waves: - Abnormal in V2, V3; - Greater than 0.03-0.04 sec and/or 1/4 R wave; * Transmural
MI: Q waves seen after 24-48 hrs; * Q1, QaVL, S3 (or small RIII): - consider
Anterior Hemiblock * Q3 (small), S1 (small R in I); - consider
Post HemiBlock * Q3/Large S1: consider Pulmonary Infarct * * Non Classical Myocardial
infarct Q waves/QS complexes; -
Left BBB: QS in V1, V2; - COPD: QS in V1-V3; - Muscular Dystrophy; - LVH: (2nd to AI): QS in V1-V4; -
IHSS: may have inferolateral q waves: -
WPW: depending on the tract may have q waves; - Caridac Tamponade: Elect Alternans pattern;
