Giant T wave inversion

Brief Review ECG showing deep T wave inversion in anterior wall myocardial infarction (Click on the image for an enlarged view) Giant T wave inversion can be broad and deep or just deep T inversions. A depth of T wave of 10 mm or above is generally considered as deep T inversion [1]. Giant T wave inversions with depth of 35 mm have also been described in literature [2]. Deep T inversions without gross increase in width can occur in ischemia and hypertrophic cardiomyopathy. In a study involving 864 patients with hypertrophic cardiomyopathy, 15% had giant T wave inversion [3]. While giant T inversions occurred in about one third of patients with apical hypertrophic cardiomyopathy, it was seen in only 6.2% of those with asymmetric septal hypertrophy and one fourth of those with mixed pattern of hypertrophy. But there was no significant correlation between the apical myocardial thickness and the amplitude of T wave inversion. In ischemia the width may sometimes be increased. Absence of left ventricular hypertrophy and symmetric nature of the T inversion (as in the ECG illustrated) has been suggested as indicators of myocardial ischemia in giant T wave inversion [4]. Deep and wide negative T waves are an important feature of post anoxic state and occurs typically after a Stokes-Adam attack. Presence of such broad and negative T waves in a case of complete heart block would indicate that the person had a recent episode of asystole. Since the QT interval is grossly prolonged in tha...
Source: Cardiophile MD - Category: Cardiology Authors: Tags: ECG / Electrophysiology ECG Library deep T inversion giant T inversion Large T wave inversion Source Type: blogs