Long-Term Follow-Up of Mortality and Heart Failure Hospitalisation in Patients With Intracardiac Device-Related Tricuspid Regurgitation

Introduction Tricuspid regurgitation (TR) is a known complication of cardiac implantable electronic devices (CIED). A better understanding of the patient population affected by this complication and their outcomes is needed. The aims of our study were to: 1) describe the incidence of CIED-related tricuspid regurgitation; 2) identify patient characteristics conferring risk; 3) assess the long-term risk of hospitalisation for heart failure and mortality in patients with this complication.Methods This was a retrospective cohort study of 2,265 patients that had a de novo device implantation at a tertiary referral centre between January 2010 and December 2017. Patients with echocardiograms prior to and at least 3 months after device implantation were included. Patients with moderate or severe TR at baseline were excluded.Results Following screening of medical records, 165 patients were analysed. Forty-four (44) (27%) patients developed new-onset moderate or severe device-related TR, without a significant difference between patients with permanent pacemaker (PPM) and implantable cardioverter-defibrillator (ICD). Patients with CIEDrelated tricuspid regurgitation had a higher rate of hospitalisation for heart failure than those without (63.6% vs 34.7%, p=0.001) during a median follow-up of 29 months (IQR 13-60 months). Subsequent analyses showed that the association between CIED-related TR and heart failure hospitalisation only became significant in the period beyond 12 months following CIED implantation. Piecewise Cox regression analysis stratified at 12 months of follow-up showed that CIED-related TR was associated with an increased risk of heart failure hospitalisation beyond 12 months after adjustment for differences in baseline characteristics (HR 1.99, 95% CI 1.05-3.76, p=0.03). There was a higher mortality rate in the group with CIED-related TR; however, this did not reach significance (36.3% vs 22.3%, p=0.09).Conclusion CIED-related TR is common and clinically significant with serious implications for long-term outcomes, especially congestive heart failure.