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Role of myocardial fibrosis in hypertrophic cardiomyopathy: A systematic review and updated meta-analysis of risk markers for sudden death

Session Poster Session 1

Speaker Marcelo Imbroinise Bittencourt

Congress : Heart Failure 2018

  • Topic : arrhythmias and device therapy
  • Sub-topic : Hypertrophic Cardiomyopathy
  • Session type : Poster Session
  • FP Number : P517

Authors : MI Bittencourt (Rio de Janeiro,BR), SA Cader (Rio de Janeiro,BR), DV Araujo (Rio de Janeiro,BR), ALF Salles (Rio de Janeiro,BR), FN Albuquerque (Rio de Janeiro,BR), PPM Spineti (Rio de Janeiro,BR), DC Albuquerque (Rio de Janeiro,BR), R Mourilhe-Rocha (Rio de Janeiro,BR)

Authors:
MI Bittencourt1 , SA Cader1 , DV Araujo1 , ALF Salles1 , FN Albuquerque1 , PPM Spineti1 , DC Albuquerque1 , R Mourilhe-Rocha1 , 1State University of Rio de Janeiro, Cardiology - Rio de Janeiro - Brazil ,

Citation:

Background: Hypertrophic cardiomyopathy (HCM) is associated with sudden death (SD). Myocardial fibrosis is reportedly correlated with SD in these patients.
Purpose We performed a systematic review with meta-analysis, updating the risk markers (RMs) in HCM emphasizing myocardial fibrosis.
Methods: We reviewed HCM studies that addressed severe arrhythmic outcomes (SD, aborted SD, documented sustained ventricular tachycardia, or appropriate shock in patients with ICD) and the certain RMs: SD family history, severe ventricular hypertrophy, unexplained syncope, non-sustained ventricular tachycardia (NSVT) on 24-hour Holter monitoring, abnormal blood pressure response to exercise (ABPRE), and left ventricular outflow tract obstruction (LVOTO) in the MEDLINE, LILACS, and SciELO databases. We used relative risks (RRs) as an effect measure and random models for the analysis.
Results: Twenty-one studies were selected (14,901 patients aged 45 ± 16 years; men, 62.8%). Myocardial fibrosis was the major RM correlated with severe arrhythmic outcomes (RR, 3.43; 95% CI, 1.95-6.03). The other RMs, except for LVOTO, were also predictors: SD family history (RR, 1.75; 95% CI, 1.39-2.20), severe ventricular hypertrophy (RR, 1.86; 95% CI, 1.26-2.74), unexplained syncope (RR, 2.27; 95% CI, 1.69-3.07), NSVT (RR, 2.79; 95% CI, 2.29-3.41), and ABPRE (RR, 1.53; 95% CI, 1.12-2.08).
Conclusions: We confirmed the association of myocardial fibrosis and other RMs with severe arrhythmic outcomes in HCM and emphasize the need for new prediction models in managing these patients.

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