Case study 4: You are working in the internal medicine clinic of a large teachin

Case study 4:
You are working in the internal medicine clinic of a large teaching hospital. Today your first patient is 70-year-old J.M., a man who has been coming to the clinic for several years for management of coronary artery disease (CAD) and hypertension (HTN). He has had episodes of dizziness for the past 6 months and orthostatic hypotension, shoulder discomfort, and decreased exercise tolerance for the past 2 months. On his last clinic visit 3 weeks ago, a chest x-ray (CXR) showed cardiomegaly, and a 12-lead electrocardiogram (ECG) showed sinus tachycardia with left bundle branch block (LBBB).