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Postoperative ventricular tachycardia in patients with congenital heart disease: diagnosis and management

Abstract

Ventricular tachycardia (VT) after palliative repair of congenital heart disease is relatively rare. Despite this rarity, VT is a known cause of early, intermediate and late morbidity and mortality in these patients. A number of factors have been linked to the development of VT in this unique patient population. The purpose of this article is to provide a concise overview regarding the etiology, diagnosis and treatment of VT in patients with congenital heart disease. In-depth information will be provided to aid diagnosis and the treatment of early postoperative VT. The use of additional diagnostic methods such as echocardiography, cardiac catheterization and electrophysiology studies to risk assess patients with postoperative VT will also be discussed. In addition, I examine the long-term management strategies for VT in these patients, from medical management and cardiovascular surgery to implantation of cardioverter-defibrillators.

Key Points

  • Ventricular arrhythmias can occur in all individuals who have undergone palliative surgery for congenital heart disease, and such arrhythmias are a significant source of early, intermediate and late morbidity and mortality

  • Familiarization with the patient's original anatomy, history of surgical repair or repairs, previous electrocardiograms, hemodynamic status and underlying rhythm is essential before diagnosing and treating ventricular tachycardia (VT)

  • For accurate diagnosis, VT must be distinguished from other cardiac dysrhythmias such as supraventricular tachycardia with bundle branch block

  • Echocardiography and/or cardiac catheterization can determine whether the patient has a hemodynamic issue

  • If a hemodynamic issue is found, and catheterization or surgery can be undertaken to correct the issue, then it is recommended the patient have a electrophysiology study at some point before hospital discharge

  • If the patient has 'normal' hemodynamics, the majority of electrophysiologists would recommend an electrophysiology study with aggressive ventricular stimulation—if VT is inducible then implantation of an implantable cardioverter-defibrillator is recommended; if VT is not induced, then close follow-up and consideration of medical management is required

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Figure 1: Wide complex tachycardia in a 16-year-old patient with d-transposition of the great arteries who underwent a Mustard procedure at 1 year of age.
Figure 2: Intra-atrial re-entry tachycardia as a cause of wide complex tachycardia.

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Snyder, C. Postoperative ventricular tachycardia in patients with congenital heart disease: diagnosis and management. Nat Rev Cardiol 5, 469–476 (2008). https://doi.org/10.1038/ncpcardio1275

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