Dysrhythmias NURS 480 Exam 1 Questions With Complete Solutions

What is the route of depolarization? Correct Answer-SA node -> AV node -> His - Purkinje system -> Ventricles At what rate is the SA node firing? Correct Answer-60 - 100 BPM At what rate is the AV node firing? Correct Answer-40 - 60 BPM At what rate is the Bundle of His firing? Correct Answer-20 - 40 BPM If a patients PR segment is elongated, what might the nurse suspect? Correct Answer-a possible heart block What is a 12-lead ECG? Correct Answer-twelve electrical views of the heart using ten leads What six standard leads record the hearts FRONTAL plane? Correct Answer-I, II, III, aVR, aVL, and aVF What six precordial leads record the hearts horizontal plane? Correct Answer-V1, V2, V3, V4, V5, and V6 Where are the leads placed during a 12-lead ECG? Correct Answer-all place on the thorax above the heart