Tag Archive for EKG interpretation

EKG, ECG interpretation part II

In EKG interpretation Part II, I will focus on the EKG in various pathologic conditions.
This includes hypertrophy and enlargement, abnormal rhythm, abnormal conduction,
preexcitation syndromes, myocardial ischemia and infarction, electrolyte disturbances,
drug effects and miscellanous disorders.

In Hypertrophy and Enlargement chapter, I focus on the understanding of concepts like hypertrophy and enlargement, the underlying mechanism that produces them and the EKG appearance in right and left atrial enlargement and right and left ventricular
hypertrophy.
I tried to explain in each case why this modifications appear and I used examples for a better understanding and memorizing of the details.

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EKG (ECG) Interpretation part I

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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