J., a 67 year-old man who works as a driller in the oil fields, has a history of coronary artery disease (CAD) and has developed tachycardia. 1. What type of adrenergic blocking drug would mostly likely be recommended and why? 2. J. also has a history of heavy smoking for 45 years. What concerns would the nurse have about giving him propranolol (Inderal), a non-selective beta blocker? 3. How does J.’s age of 67 years influence his taking beta blockers and going into heart failure (HF)?