Question

Is the QRS complex Present?

is it regular?

Is the rhythm regular?

What is the heart rate?

Are there P waves?

What is the PR interval?

What rhythm is this/interpretation?

Answer all 7 questions for each of the 5 strips.


Regularity tyHeart rate QRS complexes P waves PR interval Interpretation QRS interval

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Answer #1

The QRS complex The QRS complex represents the depolarization (activation) of the ventricles. It is always referred to as the QRS complex although it may not always display all three waves. Since the electrical vector generated by the left ventricle is many times larger than the vector generated by the right ventricle, the QRS complex is actually a reflection of left ventricular depolarization. QRS duration is the time interval from the onset to the end of the QRS complex. A short QRS complex is desirable as it proves that the ventricles are depolarized rapidly, which in turn implies that the conduction system functions properly. Wide (also referred to as broad) QRS complexes indicate that ventricular depolarization is slow, which may be due to dysfunction in the conduction system

is it regular?

The rhythm is either sinus rhythm or not sinus rhythm. Sinus beat alludes to the start of the electrical movement originating from the sinus hub — otherwise called the sinoatrial hub, or SA hub. This results in an upright P wave in lead II on the ECG.

If there is a P wave before every QRS complex, and it has sinus morphology, then normal sinus rhythm, or NSR, is said to be present.


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