When Reviewing the 12-Lead Electrocardiograph (ECG) for a Healthy 86-Year-Old

Multiple Choice

When reviewing the 12-lead electrocardiograph (ECG) for a healthy 86-year-old patient who is having an annual physical examination, which of the following will be of most concern to the nurse?

A) The heart rate (HR) is 43 beats/minute.
B) The PR interval is 0.21 seconds.
C) There is a right bundle-branch block.
D) The QRS duration is 0.13 seconds.