Association of myocardial fibrosis and cardiovascular events: The multi-ethnic study of atherosclerosis

Bharath Ambale-Venkatesh, Chia Ying Liu, Yuan Chang Liu, Sirisha Donekal, Yoshiaki Ohyama, Ravi K. Sharma, Colin O. Wu, Wendy S. Post, Gregory W. Hundley, David A. Bluemke, João A.C. Lima

Research output: Contribution to journalArticlepeer-review

Abstract

Aims We used contrast-enhanced cardiac magnetic resonance (CMR) to evaluate differences in myocardial fibrosis measured at the year-10 examination between participants with and without cardiovascular (CV) events accrued in a large population based study over the preceding 10-year follow-up period in this retrospective study. Methods and results The MESA study enrolled 6814 participants free of CV disease at baseline (2000-2002). We included MESA participants who underwent contrast-enhanced CMR at the MESA year-10 exam (N = 1840). We defined a composite CV endpoint of coronary heart disease, heart failure, atrial fibrillation, stroke, and peripheral artery disease. Using CMR, we characterized myocardial fibrosis with late-gadolinium enhancement for scar and T1 mapping indices of diffuse fibrosis. Demographic and CV-risk adjusted logistic (presence of scar) and linear regression (pre-contrast T1, T1 at 12 and 25 min post-contrast, and extracellular volume fraction or ECV) models were used to assess the relationship between fibrosis and events. The mean values of T1 indices were - pre-contrast T1: 977 ± 45 ms; T1 at 12': 456 ± 40 ms; T1 at 25': 519 ± 41 ms; ECV: 27.1 ± 3.2%. One-hundred and forty-six (7.9%) participants had myocardial scar. The presence of scar was strongly associated with prior CV events (adjusted coeff: 1.36, P < 0.001). Lower post-contrast T1 times and higher ECV, indicative of greater diffuse fibrosis were strongly associated with CV events (T1 at 12': coeff = -10.0 ms, P = 0.004; T1 at 25': coeff =-9.2 ms, P = 0.008; ECV: coeff = 1.31%, P < 0.001). Conclusion Individuals who suffered prior CV events have greater likelihood of diffuse myocardial fibrosis when compared with event-free individuals living in the same community.

Original languageEnglish (US)
Pages (from-to)168-176
Number of pages9
JournalEuropean heart journal cardiovascular Imaging
Volume20
Issue number2
DOIs
StatePublished - Feb 1 2019

Keywords

  • T1 mapping
  • cardiac magnetic resonance imaging
  • cardiovascular disease
  • extracellular volume
  • myocardial fibrosis

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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