Final answer:
Beta blockers and antiarrhythmic agents, such as procainamide, are commonly used to manage arrhythmias including paroxysmal atrial fibrillation, but one unspecified drug is not recommended for patients with severe heart failure or recently hospitalized. Pacemakers and EADs are other modalities used to treat arrhythmias and restore normal sinus rhythm.
Step-by-step explanation:
For patients with paroxysmal atrial fibrillation and structural heart disease, the recommended first line antiarrhythmic drugs to maintain normal sinus rhythm depend on the patient's heart function. Without knowing the specific drugs mentioned in the initial statement, it is generally known that beta blockers and antiarrhythmic agents such as procainamide are used to manage arrhythmias and maintain sinus rhythm. However, the medication mentioned (which is not specified in the question) is not recommended for patients with severe heart failure, including those with New York Heart Association (NYHA) class III or IV heart failure, those who have been hospitalized with heart failure within the past 4 weeks, or those with left ventricular (LV) systolic dysfunction with an ejection fraction less than 35%.
Treatments for arrhythmias may also include medical procedures like inserting a pacemaker, and in emergency situations where fibrillation disrupts the electrical activity of the heart, the use of an external automated defibrillator (EAD) might be necessary to restore a normal sinus rhythm. These devices offer simple instructions allowing use by nonmedical personnel in public settings, they stop the heart momentarily so the sinoatrial (SA) node may trigger a normal cycle.