What is the T wave on ECG?
Table of Contents
What is the T wave on ECG?
The T wave on the ECG (T-ECG) represents repolarization of the ventricular myocardium. Its morphology and duration are commonly used to diagnose pathology and assess risk of life-threatening ventricular arrhythmias.
What happens at T wave?
The T wave represents ventricular repolarization. Generally, the T wave exhibits a positive deflection. The reason for this is that the last cells to depolarize in the ventricles are the first to repolarize.
How can you tell the difference between P and T waves?
Complete answer:
| P-Wave | T-Wave |
|---|---|
| The normal amplitude of P-wave is 0.1 to 0.12 mV. | The normal amplitude of T-wave is 0.3 mV |
| A P-wave is produced due to the depolarization of the atrial musculature | A T-wave is produced due to the repolarization of ventricular musculature. |
How long is a normal T wave?
The DURATION of the T Wave is 0.10 to 0.25 seconds or greater. The AMPLITUDE of the T Wave is less than 5 mm. The SHAPE of the T Wave is sharply or bluntly rounded and slightly asymmetrical. A T Wave always follows a QRS Complex.
What causes an abnormal T wave reading?
Primary T-wave abnormalities (ischemia or injury) are due to alterations in myocardial cellular electrophysiology and secondary T-wave abnormalities (bundle branch block or ventricular Hypertrophy) are subsequent to alterations of sequence of ventricular activation.
What part is the T wave?
The T wave occurs after the QRS complex and is a result of ventricular depolarization. T waves should be upright in most leads (except aVR and V1). T waves should be asymmetric in nature. The second portion of the T wave should have a steeper decline when compared to the incline of the first part of the T wave.
Is it ap wave or T wave?
The QRS wave is produced by the atrioventricular node (AV). The P wave in an ECG complex indicates atrial depolarization. The QRS is responsible for ventricular depolarization and the T wave is ventricular repolarization.
When does the T wave occur?
The T wave occurs after the QRS complex and is a result of ventricular repolarization. T waves should be upright in most leads; the exceptions are aVR and V1.