An ECG rhythm strip shows a ventricular rate of 128, a regular ventricular rhythm, a PR interval of 0.24 sec, a QRS duration of 0.08 sec, and one upright P wave before each QRS. This rhythm is:
a. Second-degree AV block type I.
b. Junctional tachycardia with a first-degree AV block.
c. Third-degree AV block.
d. Sinus tachycardia with first-degree AV block.
Ans: d. Sinus tachycardia with first-degree AV block.
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