Relations between voltage mapping and diagnosis and genetics in patients with arrhythmogenic right ventricular cardiomyopathy. (25th November 2020)

• Record Type: Journal Article
• Authors: Delasnerie, H; Mandel, F; Domain, G; Voglimacci, Q; Mondoly, P; Rollin, A; Maury, P
• Is Part Of: European heart journal. Volume 41:(2020)Supplement 2
• Publication Date: 2020-11-25
• Subjects: Arrhythmias, General: Invasive Diagnostic Methods; Cardiology -- Periodicals; Heart -- Diseases -- Periodicals; 616.12005
• DOI: 10.1093/ehjci/ehaa946.0389
• Languages: English
• ISSNs: 0195-668X

Abstract

Abstract: Introduction: Relations between voltage mapping and diagnosis or genetic background in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) have not been investigated so far. Objective: We investigate if diagnosis or genetic background were linked to voltage mapping in ARVC. Method: 70 patients with proved or suspected ARVC undergoing 3D endocardial mapping and genetic testing have been retrospectively included. Localisation and extension of bipolar low voltage areas were correlated to ARVC diagnosis and presence of a culprit mutation. Results: 44/70 fulfilled ARVC Task Force criteria and 25/70 had culprit mutations. Endocardial (38/44 vs 16/26, p=0.02) and especially infero-lateral scars (31/44 vs 9/26, p=0.003) were more often present in patients fulfilling Task force criteria vs suspected ARVC, with larger scars (area 23±27 vs 8±11 cm 2, p=0.04, perimeter 17±10 vs 11±7 cm, p=0.03) (sensitivity 86%). Mutated patients had more infero-lateral (19/25 vs 21/45, p=0.01), multiple (12/20 vs 11/34, p=0.04) and larger scars (perimeter 21±10 vs 12±7 cm, p=0.01) vs non mutated patients. In patients with ARVC diagnosed according to the Task Force criteria, there was a trend toward more infero-lateral (p=0.09) and larger scars (p=0.08) in mutated cases. PKP2-mutated cases tended to have less ourflow tract (p=0.08) and less multiple scars (p=0.09) vs other mutations. Conclusion: 3D endocardial mapping could have an important role for ARVC diagnosis and may be able to detect minor forms with otherwise insufficiant criteria for diagnosis. More frequent and larger infero-lateral scars are present in mutated patients with bordeline differences according to the mutated genes. Funding Acknowledgement: Type of funding source: None