Ebstein Anomaly Treatment & Management
- Author: Kamran Riaz, MD; Chief Editor: Park W Willis IV, MD more...
Medical Care
Ebstein anomaly presents with a spectrum of congenital abnormalities of the tricuspid valve and the right ventricle. The age of presentation with symptoms is variable, and a wide range of treatment options is available. Treatment of Ebstein anomaly is complex and dictated mainly by the severity of the disease itself and the effect of accompanying congenital structural and electrical abnormalities. Treatment options include medical therapy, radiofrequency ablation, and surgical therapy.
- Antibiotic prophylaxis for infective endocarditis
- Medical therapy for heart failure - Angiotensin-converting enzyme (ACE) inhibitors, diuretics, and digoxin
- Arrhythmia treatment - Medical treatments such as anti-arrhythmic drugs or radiofrequency ablation of the accessory pathways
- Curative therapy of SVT with radiofrequency ablation is currently the treatment of choice.
- The success rate is lower than that in patients without significant structural heart disease.
- Factors associated with lower likelihood of success include the following:
- Accessory pathways located along the atrialized right ventricle
- Multiple accessory pathways
- Complex geometry of the pathways
- Abnormal morphology of the endocardial action potentials in this region
Surgical Care
Surgical care includes correction of the underlying tricuspid valve and right ventricular abnormalities, correction of any associated intracardiac defects, palliative procedures in early days of life as a bridge to more definitive surgical treatment later, and surgical treatment of associated arrhythmias. Complete repair of Ebstein anomaly in symptomatic neonates has been shown to be feasible, with good early and late survival and excellent functional status.[5]
- Indications for surgery are generally as follows:
- New York Heart Association (NYHA) class I-II heart failure with worsening symptoms or with a cardiothoracic ratio of 0.65 or greater[6]
- NYHA class III-IV heart failure
- History of paradoxical embolism
- Significant cyanosis with arterial O2 saturation of 80% or less and/or polycythemia with hemoglobin of 16 g/dL or more
- Arrhythmias refractory to medical and radiofrequency ablation
- Generally, the trend is to perform surgery earlier rather later in the course of heart failure.
- Various approaches are available to treat structural abnormalities.
- Tricuspid valve repair is preferred over valve replacement, and bioprosthetic valves are preferred over mechanical prosthetic valves.
- The atrialized portion of the right ventricle can be resected surgically, and the markedly dilated, thin-walled right atrium can be resected.
- Associated septal defects may be closed.
- Palliative procedures include creation of atrial septal defect, closure of tricuspid valve with plication of the right atrium, and maintenance of pulmonary blood flow through aortopulmonary shunt. Palliative procedures usually are reserved for severely ill infants with otherwise dire prognosis.
- Left ventricular dysfunction should not be considered a contraindication to tricuspid valve surgery. In these patients, although early mortality is greater with tricuspid valve surgery, the late results are favorable and left ventricular function seems to improve postoperatively.[7, 8]
- Functional status improves after surgery.
- Surgical treatments of arrhythmias include the following:
- Ablation of the accessory pathways
- Maze procedure for atrial arrhythmias
- Cardiac transplantation is appropriate in selected patients.
Consultations
- Electrophysiologist
- Cardiac surgeon
Diet
A low-sodium diet is recommended for symptomatic relief from fluid overload.
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