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    Relation of asymmetric dimethylarginine and cardiac involvement in systemic sclerosis
    (Publisaude-Edicoes Medicas Lda, 2014) Dag, Sevin; Budulgan, M.; Dilek, B.; Batmaz, I; Ariturk, Z.; Nas, K.; Cevik, R.
    Objectives: The heart is a commonly involved organ in systemic sclerosis (SSc) and pulmonary hypertension is a commonly observed complication that is associated with poor prognosis in this disease. Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide synthases. In this study, we aimed to contribute to an early diagnosis of cardiac involvement by evaluating ADMA and tissue Doppler echocardiographic findings in patients with SSc. Methods: 30 SSc patients without clinical cardiac symptoms and 30 controls were included. Plasma ADMA levels were measured and tissue Doppler echocardiography examination was carried out for all participants. Systolic and diastolic functions were assessed; pulmonary arterial systolic pressure and mean pulmonary arterial pressure were measured. Results: The patient and control groups demonstrated a significant difference with regard to right ventricular free wall tissue Doppler late diastolic wave, pulmonary arterial systolic pressure, right ventricular ejection fraction, and right ventricular diastolic dysfunction values. ADMA levels were significantly higher in SSc patients and also in active patients compared to inactive patients. No significant relationship between ADMA and echocardiographic parameters was found. Conclusion: Tissue Doppler echocardiography is capable of revealing impaired right ventricular functions and increased pulmonary arterial systolic pressure before the occurrence of any cardiac clinical symptoms in patients with SSc. Serum ADMA levels were increased in SSc and in patients with active disease.