The nurse obtains an ECG monitor strip and makes the following analysis: no apparent P waves, ventricular rate 152 beats per minute and regular, and narrow QRS complex (0.08). The nurse interrupts this rhythm as:
1. Supraventricular tachycardia.
2. Sinus tachycardia.
3. Atrial fibrillation.
4. Ventricular fibrillation.
Supraventricular tachycardia.
Rationale: Supraventricular tachycardia (SVT) is a tachycardia that is generated somewhere above the ventricles. This general term encompasses all fast (tachy) rhythms with normal QRS complexes and heart rates greater than 100 beats per minute. There are no apparent P waves; thus it cannot be called "sinus" tachycardia. Atrial fibrillation does not have P waves present, but it is always irregular. Ventricular fibrillation would have no P waves, but the QRS complexes would be > 0.12 second.
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ANS:
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