Hitomi Kobayashi1, Yasuyuki Kobayashi2, Isamu Yokoe3, Yosikatsu Akashi4, Masami Takei1, Jon T Giles5. 1. Nihon University School of Medicine, Tokyo, Japan. 2. St. Marianna University School of Medicine, Kawasaki, Japan. 3. Itabashi Chuo Medical Center, Tokyo, Japan. 4. St. Marianna University School of Medicine, Kawasaki, Japan, and Nihon University School of Medicine, Tokyo, Japan. 5. Columbia University, College of Physicians and Surgeons, New York, New York.
Abstract
OBJECTIVE: Myocardial dysfunction and heart failure (HF) are increased in rheumatoid arthritis (RA), yet there are few studies of the myocardium in RA. METHODS: RA patients with no known heart disease or risk factors underwent gadolinium-enhanced cardiac magnetic resonance imaging (MRI). Images were assessed for left-ventricular (LV) structural and functional parameters and for myocardial late gadolinium enhancement (LGE; an indicator of myocardial fibrosis) and T2-weighted imaging (an indicator of active inflammation). We modeled the associations between RA characteristics and N-terminal pro-brain natriuretic protein (NT-proBNP) levels with LGE and T2-weighted imaging. We also assessed whether LGE and/or T2-weighted imaging were associated with abnormal LV structure or dysfunction. RESULTS: A total of 60 RA patients were studied. LGE was present in 19 (32%) and T2-weighted imaging in 7 (12%), 5 of whom also had LGE. After adjustment for relevant confounders, higher odds of LGE with each swollen joint (odds ratio [OR] 1.87, P = 0.008), each log unit higher C-reactive protein level (OR 3.36, P = 0.047), and each log unit higher NT-proBNP (OR 20.61, P = 0.009) were found. NT-proBNP was also significantly higher (135%) among those with T2-weighted imaging than in those without T2-weighted imaging or LGE. Higher LV mass index and LV mass:end diastolic volume ratio were observed in those with T2-weighted imaging than in those with no myocardial abnormalities and in those with LGE without T2-weighted imaging; however, ejection fraction was not reduced in those with either LGE or T2-weighted imaging. CONCLUSION: These data suggest that cardiac MRI findings indicating myocardial inflammation/fibrosis are correlated with RA disease activity and alterations in myocardial structure known to precede clinical HF.
OBJECTIVE:Myocardial dysfunction and heart failure (HF) are increased in rheumatoid arthritis (RA), yet there are few studies of the myocardium in RA. METHODS:RApatients with no known heart disease or risk factors underwent gadolinium-enhanced cardiac magnetic resonance imaging (MRI). Images were assessed for left-ventricular (LV) structural and functional parameters and for myocardial late gadolinium enhancement (LGE; an indicator of myocardial fibrosis) and T2-weighted imaging (an indicator of active inflammation). We modeled the associations between RA characteristics and N-terminal pro-brain natriuretic protein (NT-proBNP) levels with LGE and T2-weighted imaging. We also assessed whether LGE and/or T2-weighted imaging were associated with abnormal LV structure or dysfunction. RESULTS: A total of 60 RApatients were studied. LGE was present in 19 (32%) and T2-weighted imaging in 7 (12%), 5 of whom also had LGE. After adjustment for relevant confounders, higher odds of LGE with each swollen joint (odds ratio [OR] 1.87, P = 0.008), each log unit higher C-reactive protein level (OR 3.36, P = 0.047), and each log unit higher NT-proBNP (OR 20.61, P = 0.009) were found. NT-proBNP was also significantly higher (135%) among those with T2-weighted imaging than in those without T2-weighted imaging or LGE. Higher LV mass index and LV mass:end diastolic volume ratio were observed in those with T2-weighted imaging than in those with no myocardial abnormalities and in those with LGE without T2-weighted imaging; however, ejection fraction was not reduced in those with either LGE or T2-weighted imaging. CONCLUSION: These data suggest that cardiac MRI findings indicating myocardial inflammation/fibrosis are correlated with RA disease activity and alterations in myocardial structure known to precede clinical HF.
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