Which of the following criteria applies to third-degree block?
a. There is no relationship between the P waves and the QRS complexes.
b. The PR interval becomes progressively longer.
c. The ventricular rate is twice that of the atrial rate.
d. The QRS complex is inverted compared to the P wave.
ANS: A
This arrhythmia can be recognized when it is established that there is no relationship between the P waves and the QRS complexes.
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