What is P wave and T wave?
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What is P wave and T wave?
‘P’ wave is the first wave in an ECG and is a positive wave. It indicates the activation of the SA nodes. ‘T’ wave too is a positive wave and is the final wave in an ECG though sometimes an additional U wave may be seen. It represents ventricular relaxation. The p wave is also called the atrial complex.
What does QRS wave represent?
QRS complex (ventricular depolarization) The QRS complex represents ventricular depolarization. Ventricular rate can be calculated by determining the time interval between QRS complexes.
What does the P wave show?
The P wave indicates atrial depolarization. The P wave occurs when the sinus node, also known as the sinoatrial node, creates an action potential that depolarizes the atria.
What does the T wave interval represent?
In electrocardiography, the T wave represents the repolarization of the ventricles. The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the absolute refractory period. The last half of the T wave is referred to as the relative refractory period or vulnerable period.
What does P wave represent Class 11?
atrial depolarization
P wave: It is the first wave of ECG of duration 0.1 sec, directed upwards, rounded or pointed. It is due to atrial depolarization and also represents the spread of impulse from SA Node to atrial muscles. Its height is up to 0.5 mV which represents the functional activity of atrial muscles.
What is difference between P wave and I wave?
There are two types of seismic waves : Body waves….Difference between s waves and p waves.
| P waves | S waves |
|---|---|
| The first wave to hit seismographs | Second waves to hit seismographs |
| They are compression waves | They are shear waves |
| Can move through solids and liquids | Can only move through solids |
What does P stand for in ECG?
Answer. The P wave represents atrial depolarization. The normal P wave morphology is upright in leads I, II, and aVF, but it is inverted in lead aVR.
What do these P wave QRS complex and T wave represent Class 11?
The P-wave represents the electrical excitation (or depolarisation) of the atria. The QRS complex represents the depolarisation of the ventricles. The T-wave represents the repolarisation.