Prognostic value of cardiac magnetic resonance septal late gadolinium enhancement patterns for periaortic ventricular tachycardia ablation: Heterogeneity of the anteroseptal substrate in nonischemic cardiomyopathy

Takuro Nishimura, Hena N. Patel, Shuo Wang, Gaurav A. Upadhyay, Heather L. Smith, Cevher Ozcan, Dalise Y. Shatz, Hemal M. Nayak, Amit R. Patel, Roderick Tung

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Background: Ventricular tachycardia (VT) from the anteroseptal subtype of nonischemic cardiomyopathy has a high probability of recurrence after catheter ablation. Objective: The purpose of this study was to determine the predictive value of septal scar patterns by late gadolinium enhancement (LGE) cardiac magnetic resonance (CMR) on ablation outcomes in patients with VT arising from an anteroseptal substrate. Methods: Patients with periaortic VT arising from an anteroseptal substrate with preprocedural wideband LGE-CMR were divided into 2 groups by the degree of longitudinal septal LGE extension as full-length septal (≥80% anteroposterior length) or partial septal (<80% anteroposterior length). Septal LGE volumes were quantified in those with and without VT recurrence. Results: Among 234 patients referred for scar-related VT ablation between 2017 and 2020, 25 patients (92% male; age 64 ± 8 years) and a total of 108 VTs were analyzed. A greater number of VT morphologies were induced in patients with full-length septal LGE compared to partial septal LGE (median [interquartile range]: 5 [3–9] vs 2 [1–4]; P = .005). Patients with VT recurrence had larger septal LGE volumes compared to those without recurrence (11.4 mL [8.8–13.9] vs 4.2 mL [0–9.5]; P = .012). At median follow-up of 16 months (5–22), overall freedom from VT recurrence was 52% and significantly higher in patients with partial septal LGE than in those with full-length septal LGE (80% vs 20%; P = .005). Conclusion: VT originating from an anteroseptal substrate is associated with heterogeneous patterns and extent of CMR septal scar. Preprocedural imaging may substratify this challenging patient population for the propensity for multiple induced VT morphologies and recurrence after catheter ablation.

Original languageEnglish (US)
Pages (from-to)579-588
Number of pages10
JournalHeart Rhythm
Volume18
Issue number4
DOIs
StatePublished - Apr 2021
Externally publishedYes

Keywords

  • Ablation
  • Cardiac magnetic resonance
  • Late gadolinium
  • Magnetic resonance imaging
  • Septal scar
  • Ventricular tachycardia

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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