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Circ Cardiovasc Imaging. 2019 Feb;12(2):e008513. doi: 10.1161/CIRCIMAGING.118.008513.

Disease Activity in Mitral Annular Calcification.

Author information

1
Leon H. Charney Division of Cardiology, New York University School of Medicine, New York, NY (D.M.).
2
Department of Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY (M.G.T., S.S.).
3
British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, United Kingdom (J.P.M.A., A.R.C., W.S.A.J., A.T.V., M.K.D., T.A.P., D.E.N., M.R.D.).
4
Department of Nuclear Medicine, University Hospital of Brest, France (R.A.).
5
Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands (K.H.Z.).
6
Cardiology Section, San Francisco Veterans Affairs Health Care System and Department of Epidemiology and Biostatistics, University of California, San Francisco, CA (J.R.K.).

Abstract

BACKGROUND:

Mitral annular calcification (MAC) is associated with cardiovascular events and mitral valve dysfunction. However, the underlying pathophysiology remains incompletely understood. In this prospective longitudinal study, we used a multimodality approach including positron emission tomography, computed tomography, and echocardiography to investigate the pathophysiology of MAC and assess factors associated with disease activity and progression.

METHODS:

A total of 104 patients (age 72±8 years, 30% women) with calcific aortic valve disease, therefore predisposed to MAC, underwent 18F-sodium fluoride (calcification activity) and 18F-Fluorodeoxyglucose (inflammation activity) positron emission tomography, computed tomography calcium scoring, and echocardiography. Sixty patients underwent repeat computed tomography and echocardiography after 2 years.

RESULTS:

MAC (mitral annular calcium score >0) was present in 35 (33.7%) patients who had increased 18F-fluoride (tissue-to-background ratio, 2.32 [95% CI, 1.81-3.27] versus 1.30 [1.22-1.49]; P<0.001) and 18F-Fluorodeoxyglucose activity (tissue-to-background ratio, 1.44 [1.37-1.58] versus 1.17 [1.12-1.24]; P<0.001) compared with patients without MAC. MAC activity (18F-fluoride uptake) was closely associated with the local calcium score and 18F-Fluorodeoxyglucose uptake, as well as female sex and renal function. Similarly, MAC progression was closely associated with local factors, in particular, baseline MAC. Traditional cardiovascular risk factors and calcification activity in bone or remote atherosclerotic areas were not associated with disease activity nor progression.

CONCLUSIONS:

MAC is characterized by increased local calcification activity and inflammation. Baseline MAC burden was associated with disease activity and the rate of subsequent progression. This suggests a self-perpetuating cycle of calcification and inflammation that may be the target of future therapeutic interventions.

KEYWORDS:

disease progression; inflammation; mitral valve; positron emission tomography computed tomography

PMID:
30712363
PMCID:
PMC6366554
[Available on 2020-02-01]
DOI:
10.1161/CIRCIMAGING.118.008513
[Indexed for MEDLINE]

Publication types, MeSH terms, Supplementary concept, Grant support

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