Rheumatology

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Browsing Rheumatology by Author "Du Toit, Riette"

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    A massive pericardial effusion in South Africa is not always due to tuberculosis
    (South African Heart Association, 2020) Ntshalintshali, Sipho; Mhlana, Nontembiso; Moosajee, Farzana; Abousriwiel, Riyad; George, Kiran; Du Toit, Riette
    South Africa (SA) has a high incidence of tuberculosis. Medical conditions mimicking tuberculosis often result in erroneous treatment with antitubercular therapy (ATT) before a definitive diagnosis is made. We report on 2 cases presenting with massive pericardial effusions secondary to Still’s disease (sJIA) and Adult onset Still’s disease (AOSD). Both cases were treated with ATT, with an alternative diagnosis only considered upon poor response to therapy and the development of ATT associated side effects. Our objective is to remind clinicians of other potential differential diagnoses in the clinical scenario of massive effusive pericarditis in a tuberculosis endemic region.
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    Speckle tracking echocardiography in acute lupus myocarditis : comparison to conventional echocardiography
    (BioScientifica, 2017) Du Toit, Riette; Herbst, Phillip G.; Van Rensburg, Annari; Snyman, Hendrik W.; Reuter, Helmuth; Doubell, Anton F.
    Aims: Lupus myocarditis occurs in 5–10% of patients with systemic lupus erythematosus (SLE). No single feature is diagnostic of lupus myocarditis. Speckle tracking echocardiography (STE) can detect subclinical left ventricular dysfunction in SLE patients, with limited research on its utility in clinical lupus myocarditis. We report on STE in comparison to conventional echocardiography in patients with clinical lupus myocarditis. Methods and results: A retrospective study was done at a tertiary referral hospital in South Africa. SLE patients with lupus myocarditis were included and compared to healthy controls. Echocardiographic images were reanalyzed, including global longitudinal strain through STE. A poor echocardiographic outcome was defined as final left ventricular ejection fraction (LVEF) <40%. 28 SLE patients fulfilled the criteria. Global longitudinal strain correlated with global (LVEF: r = −0.808; P = 0.001) and regional (wall motion score: r = 0.715; P < 0.001) function. In patients presenting with a LVEF ≥50%, global longitudinal strain (P = 0.023), wall motion score (P = 0.005) and diastolic function (P = 0.004) were significantly impaired vs controls. Following treatment, LVEF (35–47% (P = 0.023)) and wall motion score (1.88–1.5 (P = 0.017)) improved but not global longitudinal strain. Initial LVEF (34%; P = 0.046) and global longitudinal strain (−9.5%; P = 0.095) were lower in patients with a final LVEF <40%. Conclusions: This is the first known report on STE in a series of patients with clinical lupus myocarditis. Global longitudinal strain correlated with regional and global left ventricular function. Global longitudinal strain, wall motion score and diastolic parameters may be more sensitive markers of lupus myocarditis in patients presenting with a preserved LVEF ≥50%. A poor initial LVEF and global longitudinal strain were associated with a persistent LVEF <40%. Echocardiography is a non-invasive tool with diagnostic and prognostic value in lupus myocarditis.