ASK MISH

In the EKG (ECG) interpretation part I, I introduced the normal EKG.
EKG (ECG) is the acronym for electrocardiogram and means the recording of the
electrical activity of the heart. The electrical activity of the heart is based on the cardiac
cell action potential. This is why I chose to introduce in the first few slides a short
revision of the cardiac action potential.

Action potential is a short living event where cell membrane allows ions in and out and
this movement creates an electrical current which can be sensed by a machine and
recorded on a special paper (EKG). This current is necessary for the proper functioning of the heart as a pump (myocardial contraction and relaxation).

Normal EKG shows how this recorded electrical activity should look like in a normal
working heart. I introduced and explained the main EKG components: P wave, QRS
complex, T wave, segments and intervals, their normal look and duration on a
physiologic EKG (ECG).

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