Abstract:
AIMS:Midwall myocardial fibrosis on cardiovascular magnetic resonance (CMR) is a marker of early ventricular decompensation and adverse outcomes in aortic stenosis (AS). We aimed to develop and validate a novel clinical score using variables associated with midwall fibrosis. METHODS AND RESULTS:One hundred forty-seven patients (peak aortic velocity (Vmax) 3.9 [3.2,4.4] m/s) underwent CMR to determine midwall fibrosis (CMR cohort). Routine clinical variables that demonstrated significant association with midwall fibrosis were included in a multivariate logistic score. We validated the prognostic value of the score in two separate outcome cohorts of asymptomatic patients (internal: n = 127, follow-up 10.3 [5.7,11.2] years; external: n = 289, follow-up 2.6 [1.6,4.5] years). Primary outcome was a composite of AS-related events (cardiovascular death, heart failure, and new angina, dyspnoea, or syncope). The final score consisted of age, sex, Vmax, high-sensitivity troponin I concentration, and electrocardiographic strain pattern [c-statistic 0.85 (95% confidence interval 0.78-0.91), P < 0.001; Hosmer-Lemeshow χ(2) = 7.33, P = 0.50]. Patients in the outcome cohorts were classified according to the sensitivity and specificity of this score (both at 98%): low risk (probability score <7%), intermediate risk (7-57%), and high risk (>57%). In the internal outcome cohort, AS-related event rates were >10-fold higher in high-risk patients compared with those at low risk (23.9 vs. 2.1 events/100 patient-years, respectively; log rank P < 0.001). Similar findings were observed in the external outcome cohort (31.6 vs. 4.6 events/100 patient-years, respectively; log rank P < 0.001). CONCLUSION:We propose a clinical score that predicts adverse outcomes in asymptomatic AS patients and potentially identifies high-risk patients who may benefit from early valve replacement.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Chin CW,Messika-Zeitoun D,Shah AS,Lefevre G,Bailleul S,Yeung EN,Koo M,Mirsadraee S,Mathieu T,Semple SI,Mills NL,Vahanian A,Newby DE,Dweck MRdoi
10.1093/eurheartj/ehv525subject
Has Abstractpub_date
2016-02-21 00:00:00pages
713-23issue
8eissn
0195-668Xissn
1522-9645pii
ehv525journal_volume
37pub_type
杂志文章abstract::The pathogenic T cell responsible for myocarditis following CVB3 infection differs between BALB/c and DBA/2 mice. Since these two strains are identical at the major histocompatibility (MHC) loci (both H-2d), our aim was to investigate the genetic basis for this difference in T cell immunity, as well as the tissue orig...
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