Tricuspid Annulus Disjunction

• Published in: JACC. Cardiovascular imaging 2021-08, Vol.14 (8), p.1535-1543
• Main Authors: Aabel, Eivind W., Chivulescu, Monica, Dejgaard, Lars A., Ribe, Margareth, Gjertsen, Erik, Hopp, Einar, Hunt, Tove E., Lie, Øyvind H., Haugaa, Kristina H.
• Format: Article
• Language: English
• Subjects: cardiac magnetic resonance; mitral annulus disjunction; mitral valve prolapse; tricuspid annulus disjunction; ventricular arrhythmia
• ISSN: 1936-878X; 1876-7591
• DOI: 10.1016/j.jcmg.2021.01.028

This study aimed to assess whether patients with MAD also have disjunction of the tricuspid annulus. Mitral annulus disjunction (MAD) is an abnormal atrial displacement of the mitral annulus. Whether the disjunction extends to the right side of the heart is not known. In a cohort of patients with MAD, we assessed the presence of tricuspid annulus disjunction (TAD) with the use of cardiac magnetic resonance. We explored the associations between TAD and MAD characteristics and the relationship to ventricular arrhythmias (nonsustained/sustained ventricular tachycardias and aborted cardiac arrest). We included 84 patients (mean age: 48 ± 16 years; 63% female). We observed TAD in 42 (50%). Patients with TAD were older (age 52 ± 16 years vs. 43 ± 15 years; p = 0.02), had greater circumferential extent of MAD (164 ± 57° vs. 115 ± 58°; p = 0.002), greater maximum longitudinal MAD distance (9.4 ± 2.9 mm vs. 6.2 ± 2.8 mm; p