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Catheter Ablation of Post-Infarct VT: Mechanisms, Strategies and Outcomes

Mehrdad Emami1, Joseph B Morton2, Kim H Chan3

  • 1Centre for Heart Rhythm Disorders, University of Adelaide and the Royal Adelaide Hospital, Adelaide, SA, Australia.

Heart, Lung & Circulation
|November 29, 2018
PubMed

Insights

Catheter ablation effectively treats recurrent ventricular tachycardia in myocardial infarction survivors, offering an alternative when defibrillators fail or antiarrhythmic drugs are ineffective, improving patient outcomes.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Surgery

Background:

  • Ventricular arrhythmias pose a significant mortality risk post-myocardial infarction.
  • Implantable cardioverter-defibrillators (ICDs) reduce sudden cardiac death but do not resolve the arrhythmogenic substrate.
  • Recurrent ICD shocks negatively impact patient well-being and prognosis.

Purpose of the Study:

  • To review the mechanisms driving ventricular tachycardia (VT) in patients with prior myocardial infarction.
  • To outline the indications for catheter ablation in this patient population.
  • To discuss catheter ablation strategies and outcomes for managing recurrent VT.

Main Methods:

  • Literature review focusing on ventricular tachycardia mechanisms post-myocardial infarction.
  • Analysis of studies evaluating catheter ablation for recurrent VT.
  • Examination of data on ablation indications, techniques, and patient outcomes.

Main Results:

  • Catheter ablation is a viable treatment for recurrent VT when antiarrhythmic drugs fail or cause adverse effects.
  • Understanding VT substrate post-myocardial infarction is crucial for successful ablation.
  • Ablation strategies vary based on VT characteristics and myocardial scar patterns.

Conclusions:

  • Catheter ablation offers an effective therapeutic option for managing recurrent ventricular tachycardia in patients with prior myocardial infarction.
  • It can reduce ICD shocks and improve quality of life.
  • Further research into substrate-based ablation techniques may enhance long-term efficacy.

Keywords:
Catheter ablationIschaemic heart diseaseVentricular tachycardia

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