Management of Runs of Premature Atrial Contractions (PACs)

Understanding PACs and Their Significance

• The American College of Cardiology recommends assessing for potentially reversible causes of PACs, including electrolyte abnormalities, such as potassium and magnesium deficiencies, in patients with runs of PACs 1

Evaluation of Patients with Runs of PACs

• The American College of Cardiology suggests evaluating patients with runs of PACs for hyperthyroidism, as it is a potentially reversible cause of PACs 2
• The European Heart Journal recommends considering stimulant use, such as caffeine and medications, as a potential cause of PACs in patients with runs of PACs 3
• The American Heart Association suggests assessing for sleep apnea in patients with runs of PACs, as it is a potentially reversible cause of PACs 4

Treatment Algorithm for Runs of PACs

First-Line Management

• The American College of Cardiology recommends beta blockers as the first-line treatment option for symptom control and prevention of progression to atrial fibrillation in patients with runs of PACs 1
• The American College of Cardiology suggests addressing modifiable risk factors, such as treating underlying conditions like hyperthyroidism and electrolyte abnormalities, in patients with runs of PACs 2
• The European Heart Journal recommends reducing alcohol and caffeine intake in patients with runs of PACs, as part of first-line management 4

Second-Line Management

• The European Heart Journal suggests considering sotalol as an effective treatment option for both rate control and suppression of PACs in patients with severe symptoms despite first-line therapy 3
• The American College of Cardiology recommends considering amiodarone in patients with structural heart disease and runs of PACs, as part of second-line management 1

Special Considerations

• The American College of Cardiology recommends monitoring patients with frequent PACs for development of atrial fibrillation, as they represent a high-risk group, and considering anticoagulation based on CHA₂DS₂-VASc score 2
• The American College of Cardiology suggests considering anticoagulation in patients with runs of PACs who develop atrial fibrillation, based on CHA₂DS₂-VASc score 5

Common Pitfalls and Caveats

• The American College of Cardiology warns against using digoxin in patients with pre-excited AF, such as WPW syndrome, as it may accelerate ventricular rate 2
• The European Heart Journal recommends avoiding class IC antiarrhythmics, such as flecainide and propafenone, in patients with structural heart disease due to increased risk of proarrhythmia 3