Home Archive Vol.43, No.2, 2017 Estimation of Oxidative Stress Involvement by Superoxide Dismutase Variation in Cardiac Arrhythmias

Estimation of Oxidative Stress Involvement by Superoxide Dismutase Variation in Cardiac Arrhythmias

MARIA CRISTINA BEZNĂ(1), Doina Cârstea(1), Marinela Beznă(2), Catalina Pisoschi(3), O. Istrătoaie(1), D.O. ALEXANDRU(4), C. EFREM(2), R.P. MELINTE(5)

(1)Department of Cardiology, University of Medicine and Pharmacy of Craiova, (2)Department of Internal Medicine, University of Medicine and Pharmacy of Craiova, (3)Department of Biochemistry, University of Medicine and Pharmacy of Craiova, (4)Department of Medical Informatics, University of Medicine and Pharmacy of Craiova, (5)Department of Human Anatomy, University of Medicine and Pharmacy of Craiova

    Abstract: Cardiac arrhythmias, commonly diagnosed in young people, involve multiple etiopathogenic factors, including oxidative stress. Purpose: Evaluation of superoxide dismutase (SOD) variations as an antioxidant enzyme (with a physiological role in the dismutation of highly reactive oxygen free radicals into oxygen and water) in young patients with cardiac arrhythmias. Material and method: The study was conducted on a group of 40 young patients with a mean age of 34 years old, of both sexes, with non-lesional cardiac dysrhythmias, compared to a control group of 40 healthy subjects, determining for both groups the SOD serum level. Diagnosis of cardiac rhythm disorder was supported by electrocardiogram, imaging and laboratory investigations. Results: SOD recorded a 61% decrease of mean values in patients compared to controls. The decreasing variation was found in all arrhythmia types, as follows: atrial fibrillation (51,54%), sinus bradycardia (54,86%), atrial flutter (55,71%), extrasystolic ventricular arrhythmia (64,20%), extrasystolic atrial arrhythmia (65,27%), combined arrhythmias (65,93%), supraventricular paroxysmal tachycardia (71,32%) and sinus tachycardia (74,24%). SOD deficiency demonstrates the involvement of oxidative stress in cardiac arrhythmic pathogenesis, excess oxygen radicals interfering with multiple mechanisms related to the onset of arrhythmogenesis. The SOD decrease was more important in females (60,57%) than in males (67,06%) and in those with nutrition poor in antioxidants. Conclusions: SOD estimation represents a biomarker whose decrease and deficiency implies occurrence of oxidative stress and implicitly highlights its role in cardiac arrhythmic pathology in young people, with the possibility of monitoring and correction by pharmacological or non-pharmacological therapeutic means.
    Keywords: superoxide dismutase enzyme, oxidative stress, arrhythmia, young people

DOI 10.12865/CHSJ.43.02.03 


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Volume 43 Issue 2 2017