Cardiac magnetic resonance in patients with ARVC and family members: the potential role of native T1 mapping.

Affiliation

Georgiopoulos G(#)(1), Zampieri M(#)(2), Molaro S(3), Chaloupka A(4), Aimo A(5)(6)(7), Barra B(8), Roberts L(9), Monje-Garcia L(10), Evans C(11), Sheikh N(12)(13), Bastiaenen R(14)(15), Cooklin M(16), Masci PG(17), Carr-White G(18)(19), Finocchiaro G(#)(20)(21), Chiribiri A(#)(22)(23).
Author information:
(1)Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(2)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(3)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(4)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(5)Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy. [Email]
(6)Cardiology Division, University Hospital of Pisa, Pisa, Italy. [Email]
(7)Cardiology Division, University Hospital of Pisa, and Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, Pisa, Italy. [Email]
(8)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(9)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(10)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(11)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(12)Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(13)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(14)Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(15)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(16)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(17)Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(18)Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(19)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(20)Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(21)Inherited Cardiac Conditions Service, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(22)Department of Cardiovascular Imaging, School of Biomedical Engineering and Imaging Sciences, Guy's and St Thomas' NHS Foundation Trust, London, UK. [Email]
(23)Wellcome Trust Medical Engineering Centre, King's College London, London, UK. [Email]
(#)Contributed equally

Abstract

Left ventricular (LV) involvement in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) is not evaluated in the revised Task Force Criteria, possibly leading to underdiagnosis. This study explored the diagnostic role of myocardial native T1 mapping in patients with ARVC and their first-degree relatives. Thirty ARVC patients (47% males, mean age 45 ± 27 years) and 59 first-degree relatives not meeting diagnostic criteria underwent CMR with native T1 mapping. C MR was abnormal in 26 (87%) patients with ARVC. The right ventricle was affected in isolation in 13 (43%) patients. Prior to T1 mapping assessment, 2 (7%) patients exhibited isolated LV involvement and 11 (36%) patients showed features of biventricular disease. Left ventricular involvement was manifest as detectable LV late gadolinium enhancement (LGE) in 12 out of 13 cases. According to pre-specified inter-ventricular septal (IVS) T1 mapping thresholds, 11 (37%) patients revealed raised native T1 values including 5 out of the 17 patients who would otherwise have been classified as exhibiting a normal LV by conventional imaging parameters. Native septal T1 values were elevated in 22 (37%) of the 59 first-degree relatives included. Biventricular involvement is commonly observed in ARVC; native myocardial T1 values are raised in more than one third of patients, including a significant proportion of cases that would have been otherwise classified as exhibiting a normal LV using conventional CMR techniques. The significance of abnormal T1 values in first-degree relatives at risk will need validation through longitudinal studies.