Contents
What are the 3 recognizable ECG waves?
As the name suggests, the QRS complex includes the Q wave, R wave, and S wave. These three waves occur in rapid succession. The QRS complex represents the electrical impulse as it spreads through the ventricles and indicates ventricular depolarization.
What are the waves called in an EKG?
There are three main components to an ECG: the P wave, which represents the depolarization of the atria; the QRS complex, which represents the depolarization of the ventricles; and the T wave, which represents the repolarization of the ventricles.
How long does a EKG take?
How long does the test take? The test usually takes 5 to 10 minutes.
What causes no P waves?
A lack of visible P waves preceding QRS complexes suggests a lack of sinus beats; this may occur with sinus dysfunction or in the presence of fibrillation or flutter waves. The P wave may also be hidden within the QRS complex.
What causes extra P waves?
The Abnormal P wave Elevation or depression of the PTa segment (the part between the p wave and the beginning of the QRS complex) can result from atrial infarction or pericarditis. If the p-wave is enlarged, the atria are enlarged.
What does the S wave represent on an ECG?
Click to see full answer. Hereof, what is the S wave in an ECG? The S wave is the first downward deflection of the QRS complex that occurs after the R wave. In the normal ECG, there is a large S wave in V1 that progressively becomes smaller, to the point that almost no S wave is present in V6.
What do you need to know about ECG interpretation?
Overview of the normal electrocardiogram (ECG) ECG interpretation includes an assessment of the morphology (appearance) of the waves and intervals on the ECG curve. Therefore, ECG interpretation requires a structured assessment of the waves and intervals. Before discussing each component in detail, a brief overview of the waves …
Is there a waveform for the P wave on an EKG?
Therefore, it is another isoelectric period and there is no designated waveform on EKG. This is known as the PR segment – the period between the P wave (atrial depolarization and contraction as discussed above) and the QRS complex (ventricular depolarization and contraction discussed next).
How are electrocardiographic waves connected to each other?
The electrocardiographic waves are called P, Q, R, S, T, U (in that order) and they are connected to each other by an isoelectric line. The P wave is the first wave of the cardiac cycle. It represents atrial depolarisation. It is the result of overlayiwg the electrical activity of both atria.