MEDICINE
CARDIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
It is always positive in DI, DII.V3-V6
|
|
|
It is always negative in AVR
|
|
|
It can be positive or negative in V1-V2, II and AVF
|
|
|
Represents ventricular repolarization
|
|
|
about 1/3 of the R wave
|
Detailed explanation-1: -Ventricular repolarization is the process by which the ventricular myocytes return to their negative resting potential so they can depolarize again. While this phase of the cardiac cycle is rapid, an upright low amplitude broad hump following the QRS complex is seen in normal T wave morphology.
Detailed explanation-2: -T wave. T waves represent ventricular repolarization (atrial repolarization is obscured by the large QRS complex).
Detailed explanation-3: -The T-wave represents the return of the ventricles from excited to normal state (repolarisation).
Detailed explanation-4: -Ventricular repolarization is a complex electrical phenomenon which represents a crucial stage in electrical cardiac activity. It is expressed on the surface electrocardiogram by the interval between the start of the QRS complex and the end of the T wave or U wave (QT).
Detailed explanation-5: -The T wave represents ventricular repolarization. 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.