A 65-year-old man with a history of hypertension, treated with a beta-blocker, presents to his physician for a routine physical examination. His pulse is slower than usual and an ECG is obtained.
Figure 1.
A 65-year-old man with a history of hypertension, treated with a beta-blocker, presents to his physician for a routine physical examination. His pulse is slower than usual and an ECG is obtained.
Figure 1.