Q Wave

The Q Wave A Q wave is any negative deflection that precedes an R wave The Q wave represents the normal left-to-right depolarisation of the interventricular septum Small ‘septal’ Q waves are typically seen in the left-sided leads (I, aVL, V5 and V6) Q waves in context Q waves in different leads Small Q waves are normal in most leads Deeper Q waves (>2 mm) may be seen in leads III and aVR as a normal variant Under normal circumstances, Q waves are not seen in the right-sided leads (V1-3) Pathological Q Waves Q waves are considered pathological if: ...