Browsing by Author "Karamitsos, Theodoros"

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    Abnormal myocardial perfusion correlates with impaired systolic strain and diastolic strain rate in systemic lupus erythematosus: a cardiovascular magnetic resonance study
    (BioMed Central Ltd, 2015) Ntusi, Ntobeko; Sever, Emily; Lockey, Joseph; Francis, Jane; Piechnik, Stefan; Ferreira, Vanessa; Matthews, Paul; Wordsworth, Paul; Neubauer, Stefan; Karamitsos, Theodoros
    Systemic lupus erythematosus (SLE) is a systemic autoimmune disorder that commonly affects the heart, resulting in a 7 to 9 times greater incidence of cardiovascular disease (CVD) in SLE patients compared to healthy controls. Female patients with SLE between 35 and 44 years old have an incidence of myocardial infarction over 50 times greater than that observed in the Framingham cohort. The clinical utility of cardiovascular magnetic resonance (CMR) first-pass perfusion for assessment of myocardial ischaemia is well-established. We hypothesised that CMR including stress first-pass perfusion would be able to detect coronary microvascular disease and subtle functional abnormalities in SLE and aimed to detect myocardial ischaemia in SLE using adenosine stress perfusion CMR.
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    Impaired energetics and normal myocardial lipids in rheumatoid arthritis and systemic lupus erythematosus: a phosphorous and proton magnetic resonance spectroscopy and cardiovascular magnetic resonance study
    (BioMed Central Ltd, 2015) Ntusi, Ntobeko; Holloway, Cameron; Francis, Jane; Davis, Anne; Levelt, Eylem; Piechnik, Stefan; Ferreira, Vanessa; Matthews, Paul; Wordsworth, Paul; Karamitsos, Theodoros; Neubauer, Stefan
    Rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE) commonly involve the cardiovascular system and are associated with significant morbidity and mortality, driven by cardiovascular inflammation, microvascular and diastolic dysfunction and fibrosis. Cardiovascular magnetic resonance (CMR) can assess non-invasively cardiac function, strain, ischaemia, altered vascular function, perfusion, inflammation and fibrosis; magnetic resonance spectroscopy (MRS) provides further insights into the status of myocardial energetics and lipidosis. To date, there have been no cardiovascular MRS studies in RA and SLE patients. We hypothesised that RA and SLE would be associated with impaired myocardial energetics and lipidosis.
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    Impaired myocardial perfusion in rheumatoid arthritis is associated with impaired strain, strain rate, disease activity and myocardial oedema: a cardiovascular magnetic resonance study
    (BioMed Central Ltd, 2015) Ntusi, Ntobeko; Sever, Emily; Lockey, Joseph; Francis, Jane; Piechnik, Stefan; Ferreira, Vanessa; Matthews, Paul; Wordsworth, Paul; Neubauer, Stefan; Karamitsos, Theodoros
    Rheumatoid arthritis (RA) commonly involves the cardiovascular system, and is associated with significant morbidity and mortality. Mechanisms of cardiovascular disease (CVD) involvement are not fully understood, but cardiovascular inflammation is thought to drive many of the CVD manifestations, including myocardial ischaemia. The clinical utility of CMR first-pass perfusion for assessment of myocardial ischaemia is well-established. The aim of this study was to assess whether RA patients without known epicardial coronary artery disease have evidence of myocardial hypoperfusion.
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    Impaired myocardial perfusion is associated with extracellular volume expansion, disease activity and impaired strain and strain rate in systemic sclerosis: a cardiovascular magnetic resonance study
    (BioMed Central Ltd, 2015) Ntusi, Ntobeko; Sever, Emily; Lockey, Joseph; Francis, Jane; Piechnik, Stefan; Ferreira, Vanessa; Matthews, Paul; Wordsworth, Paul; Neubauer, Stefan; Karamitsos, Theodoros
    Systemic sclerosis (SSc) is characterised by vascular dysfunction and multi-organ fibrosis, with the heart commonly involved. Cardiovascular disease (CVD) in SSc may be direct or indirect, but often remains subclinical. SSc patients with apparent cardiovascular clinical features are at greater risk of deterioration and premature cardiovascular death, often from complications of myocardial ischaemia. CMR first-pass perfusion detects myocardial ischaemia with great accuracy. We hypothesised that CMR first-pass perfusion would be able to differentiate between segmental (indicating epicardial coronary artery disease) and non-segmental subendocardial (indicating microvascular dysfunction) perfusion defects in patients with SSc; and that microvascular dysfunction (relating to chronic myocardial inflammation) was more frequent in SSc.