Page 347 - ECG dr shamol_Slide

T-wave and T –inversion

T wave indicate repolarization of the ventricle

T wave morphology the T wave is positive In most leads

Negative in lead aVR

Lead V1 may have a positive, negative, or

biphasic (positive followed by negative, or vice versa)

Isolated negative T wave in lead III, aVL, or aVF.

Why T is upright Repolarization is negative current

Repolarization of the ventricle happens in the opposite direction

of depolarization that repolarization from apex to base (opposite

to the direction of depolarization) but also a repolarization from

epicardium to endocardium (opposite to the depolarization from

endocardium to epicardium)

This double reversal in repolarization directions account for the

upward T wave, that is a T-wave in the same direction as the QRS

complex