65 y/o woman with no symptoms. Routine EKG shown here has no | Figure 1

Ljaneira

Cardiology

65 y/o woman with no symptoms. Routine EKG shown here has non-specific T wave abnormalities. What rhythm abnormalities does it show?

1. Sinoatrial node block.
2. First degree AV node block.
3. Second degree AV node block, type I.
4. Second degree AV node block, type II.
5. Third degree AV node block.

More about this case

Resolved

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(YOU MUST UNDERSTAND BASIC CARDIAC ANATOMY)
As promised in an earlier post. Here is an intro to the basic waves, segments and intervals of the ekg.
P wave- Represents atrial depolarization/ firing of the SA node. This node sits at the top of the right atrium. Also known as the pacemaker of the heart.
PR interval- Reflects conduction through the atrioventricular node. The AV node holds this signal long enough to allow the atriums to deposit their blood into the ventricles. (This is where AV blocks happen)
QRS complex- Represents ventricular depolarization (electrical impulse as it spreads through the left and right ventricles)
T wave- Represents repolarization of the ventricles.
Please feel free to drop comments on any tips and tricks you used while learning the basics of ekg.

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