preferred_name: Instruct patient of the signs and symptoms of dysfunctional pacemaker (e.g., bradycardia less than 30 beats per minute, dizziness, weakness, fatigue, chest discomfort, angina, shortness of breath, orthopnea, pedal edema, paroxysmal nocturnal dyspnea, dyspnea on exertion, hypotension, near-syncope, frank syncope, cardiac arrest)