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septal Q wave
Septal Q waves result from the initial septal depolarization towards the right ventricle. They are 25 msec in duration (max 27 msec). The leads with the largest R waves have septal Q waves. Thus septal Q waves are normally seen in lead I & in V6 (60-80% of normal individuals).
Related
electrocardiogram (ECG, EKG)
General
Q wave