Which of the Following Is a Characteristic of Third-Degree Heart

Multiple Choice

Which of the following is a characteristic of third-degree heart block?

A) There is a lengthening PR interval.
B) There is often a 2:1 ratio between P waves and QRS complexes.
C) The atrial rate is the same as the ventricular rate.
D) There is no relationship between the P waves and the QRS complexes.