An adult patient being assessed in the emergency room is anxious about his health status. The ECG rhythm strip shows a heart rate of 120 beats/min. Characteristics of a sinus tachycardia rhythm are:
A) P:QRS ratio of 2:1
B) P:QRS ratio of 1:1
C) Ventricular and atrial rhythm are irregular
D) Atrial rhythm regular, ventricular rhythm irregular
Ans: B
Feedback: Anxiety can cause a patient to experience sinus tachycardia. The characteristics of this rhythm are a P:QRS ratio of 1:1, with regular atrial and ventricular rhythm.
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