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ECG T wave
ECG deflection resulting from repolarization of the ventricles.
Special laboratory:
Electrocardiogram T wave polarity
1) upright: I, II, V3-V6
2) inverted: aVR
3) variable: II, aVL, aVF, V1-V2
Clinical significance:
T wave notching
1) children
2) pericarditis
Flat T wave: obesity
Peaked (tall) T waves (> 10 mm)
1) hyperkalemia
2) CVA
3) myocardial ischemia
T wave inversions (may be giant inverted T waves)
1) myocardial infarction - generally not diffuse
2) CNS processes
a) increased intracranial pressure
b) stroke
c) meningitis
d) subarachnoid hemorrhage
f) Stokes-Adams attacks
g) often deep, diffuse
h) may also see ST segment elevation
3) pulmonary embolism (right precordial leads)
4) pericarditis
a) T-wave inversion when ST segment returns to baseline
b) normalization of ST, PR & T wave changes occur late
Abnormal T-wave axis:
1) may be risk factor for acute MI
2) risk of MI may be as great as:
a) history of angina
b) history of MI
c) diabetes
d) hypertension
Related
electrocardiogram (ECG, EKG)
Specific
biphasic T-wave
inverted T-wave
General
electrocardiogram feature
Figures/Diagrams
Figures/diagrams/slides/tables related to T wave
References
- Current Pocket Reference 1992 Pharmacopoeia & Medical
Notes, Shepherd/Whalen, Specialty Cards, Norman OK 1997
- Internal Medicine Alert 20(21):175 1998
- Practical ECG Interpretation, T Evans, Ring Mountain Press, 1998
- Life in the Fast Lane. ECG Library
T wave
http://lifeinthefastlane.com/ecg-library/basics/t-wave/