The nurse assessing a cardiac monitor notes that the cardiac complexes each have a P wave followed by a QRS and a T. The rate is 120. The nurse recognizes this arrhythmia as:
a. sinus bradycardia.
b. atrial fibrillation.
c. sinus tachycardia. d.
ventricular tachycardia.
ANS: C
Sinus tachycardia has a P wave followed by the QRS and the T. All the components of the complex are present and in the correct order, but the rate is over 100 beats a minute.
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