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[Arrhythmia after surgery for congenital cardiopathies. What studies? What treatment?]
1Service de cardiologie pédiatrique, universitaire de Genève, Suisse.
Insights
Cardiac surgery improves lifespan but can cause arrhythmias, with types varying by surgical approach. Management ranges from observation to medication, pacemakers, and potentially radiofrequency ablation.
Area of Science:
- Cardiology
- Cardiac Surgery
- Electrophysiology
Context:
- Cardiac surgery significantly extends lifespan for congenital heart defect patients.
- Post-operative arrhythmias are a prominent source of morbidity.
- Arrhythmia incidence correlates with patient age and follow-up duration.
Purpose:
- To review the types of cardiac arrhythmias following surgery.
- To discuss diagnostic investigations for rhythm disturbances.
- To outline current and future treatment strategies for post-cardiac surgery arrhythmias.
Summary:
- Arrhythmia types are often surgery-specific: conduction and ventricular issues post-ventricular repair (e.g., tetralogy of Fallot), and sinus node dysfunction post-atrial repair (e.g., Mustard/Senning operations).
- Diagnostic tools include non-invasive (Holter, exercise testing) and invasive electrophysiology studies.
- Treatment options range from watchful waiting to antiarrhythmic drugs, pacemaker implantation, and radiofrequency ablation.
Impact:
- Improved understanding of arrhythmia etiology post-cardiac surgery.
- Guidance on selecting appropriate diagnostic methods.
- Informed clinical decision-making for managing arrhythmias, potentially improving patient outcomes and quality of life.
Abstract:
Cardiac surgery has greatly improved the outlook for patients with heart defects, giving them a much longer lifespan; it has also created specific problems and morbidity, amongst which arrhythmias are most prominent. The incidence of rhythm disturbances increases with age and duration of follow-up. To a large extent, the type of surgery determines the type of arrhythmias: conduction disturbances and ventricular arrhythmias are common after ventricular surgery (e.g. tetralogy of Fallot) whereas sinus node dysfunction, with its bradycardias and tachycardias, is prominent after atrial surgery (e.g. Mustard or Senning operations). Various types of investigations, both non invasive (Holter, exercise testing, signal averaging) and invasive electrophysiology) are available. The usefulness of these different techniques for each type of rhythm disturbance is discussed. Regarding treatment, abstention is the best approach in many cases. Others however require treatment to suppress symptoms and, sometimes, to try and prevent sudden death. The indication for various antiarrhythmic medications and also for pacemaker implantation are discussed. Radio frequency ablation appears to hold some promise for the future.