ECG Recording

Question 1

The P wave of an ECG indicates

A. atrial contraction.
B. the heart at rest.
C. ventricular contraction.
D. ventricular relaxation.

Answer 1

atrial contraction.

Question 2

Which of the following rhythms identified on an ECG prompts the medical assistant to notify the provider immediately?

A. sinus bradycardia
B. premature ventricular contraction
C. ventricular fibrillation
D. sinus tachycardia

Answer 2

ventricular fibrillation

Question 3

Which of the following indicates a normal sinus rhythm?

A. PR interval of 0.22 second, QRS complex of 0.10 second, QT interval of 0.40 second and HR of 78
B. PR interval of 0.22 second, QRS complex of 0.12 second, QT interval of 0.42 second and HR of 72
C. PR interval of 0.14 second, QRS complex of 0.10 second, QT interval of 0.40 second and HR of 78
D. PR interval of 0.14 second, QRS complex of 0.16 second, QT interval of 0.42 second and HR of 72

Answer 3

PR interval of 0.14 second, QRS complex of 0.10 second, QT interval of 0.40 second and HR of 78