Outcome Prediction score for mitral transcatheter edge-to-edge repair in patients with concomitant significant tricuspid regurgitation

Alon Shechter, Danon Kaewkes, Vivek Patel, Mordehay Vaturi, Felix Wangmang, Keita Koseki, Ofir Koren, Takashi Nagasaka, Moody Makar, Tarun Chakravarty, Sabah Skaf, Raj R. Makkar, Robert J. Siegel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Tricuspid regurgitation (TR) adversely affects prognosis following mitral transcatheter edge-to-edge repair (TEER). We aimed to derive a risk stratification tool for patients undergoing TEER for mitral regurgitation while exhibiting significant TR. Methods: This is a single-center, retrospective analysis of 217 consecutive individuals referred to an isolated mitral TEER who had moderate-to-severe or greater TR at baseline. The primary outcome was the 1-year composite of all-cause mortality or heart failure hospitalizations. The cohort was randomly split in a 75%-to-25% ratio, creating train (n = 163) and test (n = 54) datasets. Model development, discrimination, and calibration were based on the train dataset. Internal validation was applied to the test dataset. Results: Overall, 81 (37.3%) patients experienced the primary outcome. After multivariable analysis, a score for predicting the primary outcome was constructed that utilized a 0-to-3 scale, in which each point represented one of three baseline variables independently associated with this combined endpoint: serum B-natriuretic peptide (BNP) level >1,000 pg/mL, qualitative right ventricular (RV) dysfunction on transthoracic echocardiogram, and cardiac implantable electronic device (CIED). C-statistic of the model was 0.66 (95% CI, 0.57-0.75, p = 0.002) and 0.75 (95% CI, 0.61-0.89, p = 0.004) in the train and test datasets, respectively—representing comparable performance to current, more complex tools. Neither this BNP-RV-CIED (BRC) score nor other models were prognostically meaningful in 32 patients excluded from the main analysis who underwent a combined mitral-tricuspid TEER. Conclusion: The BRC score is a simple clinical prediction tool that may aid in the triage of isolated mitral TEER candidates with significant pre-existing TR.

Original languageEnglish
JournalHellenic Journal of Cardiology
DOIs
StateAccepted/In press - 2023

Keywords

  • MitraClip
  • Mitral regurgitation
  • Prediction tool
  • Transcatheter edge-to-edge repair
  • Tricuspid regurgitation

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