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Management of postoperative arrhythmias in pediatric patients
Yaniv Bar-Cohen1, Michael J Silka
1Division of Cardiology, Department of Pediatrics, Children's Hospital Los Angeles, 4650 Sunset Boulevard, MS #34, Los Angeles, CA, 90027, USA, ybarcohen@chla.usc.edu.
Insights
Post-operative arrhythmias after pediatric cardiac surgery are common and can cause hemodynamic instability. Treatment strategies differ for reentrant and automatic tachyarrhythmias, while bradyarrhythmias may require pacing.
Area of Science:
- Pediatric Cardiac Surgery
- Cardiology
- Electrophysiology
Background:
- Post-operative arrhythmias are frequent after pediatric cardiac surgery.
- Myocardial injury, ischemia, high catecholamines, and electrolyte imbalances contribute to arrhythmias.
- Patients have tenuous cardiovascular function, increasing hemodynamic compromise risk.
Purpose of the Study:
- To outline treatment strategies for post-operative arrhythmias in pediatric cardiac surgery.
- To differentiate management approaches for reentrant versus automatic tachyarrhythmias.
- To address treatment of bradyarrhythmias.
Main Methods:
- Review of treatment modalities for tachyarrhythmias, including termination and recurrence prevention.
- Discussion of strategies for reentrant arrhythmias (e.g., orthodromic reciprocating tachycardia, atrial fibrillation).
- Outline of treatments for automatic tachyarrhythmias (e.g., junctional ectopic tachycardia) and bradyarrhythmias (e.g., AV block).
Main Results:
- Termination of reentrant tachyarrhythmias involves vagal maneuvers, adenosine, pacing, or cardioversion; recurrence prevention may need antiarrhythmics or central venous line removal.
- Automatic tachyarrhythmias and their recurrence are managed with cooling, antiarrhythmics, and electrolyte correction.
- Bradyarrhythmias are treated with temporary pacing; persistent AV block may necessitate permanent pacemaker implantation.
Conclusions:
- Effective management of post-operative arrhythmias requires tailored strategies based on arrhythmia type.
- Addressing both acute termination and long-term prevention is crucial for tachyarrhythmias.
- Persistent bradyarrhythmias may require long-term pacing solutions.
Opinion Statement:
Post-operative arrhythmias occur commonly following pediatric cardiac surgery and can result in significant hemodynamic deterioration. Arrhythmias are more likely in the immediate post-operative period due to myocardial injury and ischemia, high catecholamine levels and electrolyte disturbances. At the same time, these arrhythmias are more likely to cause hemodynamic compromise due to the relatively tenuous cardiovascular function of patients immediately after cardiac surgery. Treatment of tachyarrhythmias often requires addressing two separate goals: termination of the arrhythmia and prevention of recurrences. These two objectives necessitate different treatment strategies in reentrant arrhythmias such as orthodromic reciprocating tachycardia, atrial fibrillation and intra-atrial reentrant tachycardia, including atrial flutter. Termination usually involves vagal maneuvers, adenosine administration, rapid pacing, or direct-current cardioversion. Prevention of recurrences, on the other hand, may require antiarrhythmic medications, although removal of central venous lines in the heart should be considered. Conversely, for automatic tachyarrhythmias, such as junctional ectopic tachycardia and ectopic atrial tachycardia, termination and prevention of recurrences usually involve similar modalities, including cooling, antiarrhythmic medications and correction of electrolyte abnormalities. Bradyarrhythmias, either sinus node dysfunction or AV block, can be treated by pacing with temporary epicardial wires in the short-term. In patients with persistent AV block for 7 days, however, permanent pacemaker placement may be required.
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