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Effect of MRI on ECG Parameters of Patients


Background and Objective: Increasing exposure to magnetic and electromagnetic fields is inevitable. This study evaluates effect of MRI on ECG parameters of patients. Methods: This is an analytic study conducted in 2015 in the Gonabad MRI center. Eighty-four patients referred to the MRI center were recruited by convenient sampling. Two-lead ECG was measured before and after MRI. MRI was done by Neusoft machine, made in China, with 0.35 Tesla magnetic fields. Data analysis was done by SPSS, version 14.5, using pairwise t-test and Wilcoxon test (p<0.05). Results: Heart rate was 80.63 ± 10.41 beat/minutes before MRI and 71.58 ± 10.22 beat/minutes after MRI. QT interval was 9.70 ± 1.60 mm/s before MRI and 10.95 ± 0.93 mm/s before MRI (p<0.001). P-wave duration was 2.16 ± 0.47 mm/s before MRI and 2.12 ± 0.38 mm/s after MRI (p=0.45). QRS wave duration was 1.88 ± 0.51 mm/s before MRI and 1.88 ± 0.51 mm/s after MRI (p=0.64). PR interval was 4.33 ± 0.92 mm/s before MRI and 4.33 ± 0.78 mm/s after MRI (p=0.89). Discussion: Findings showed that 0.35-tesla MRI can increase QT interval and reduce heart rate; however, it is ineffective on P-wave duration, QRS and PR interval. To control the limitation, patients referred to MRI center for the second time were selected for the study. Moreover, the patients were kept under similar conditions before MRI to avoid moderate and severe anxiety. Conclusion: This study showed that 0.35 tesla MRI can reduce heart rate and increase QT interval. However, it is ineffective on P-wave duration, QRS and PR interval. Thus, it is suggested to measure these parameters before and after MRI. 


  1. Suzanne C, Brenda G. Textbook of Brunner and Suddarth’s Medical-Surgical Nursing. Translated by Fathollahy AR. 1st ed. Tehran: Arjmand publication; 2008.
  2. Cohen BJ. Medical Terminology. 6st ed. Philadelphia; Wolters Kluwer. 2011.
  3. Omidifar N, Yamani N, Yousefi A. The Effect of ECG Training Workshop on Medical Students' Knowledge of ECG Reading and Interpretation. Strides Dev Med Educ. 2007; 3:118-125.
  4. Katti G, Ara SA, Shireen A. Magnetic Resonance Imaging (MRI) – A Review. Internatinal journal of dental clinics .2011;3:65-70.
  5. Aliabadi M, Oliaee M, Nowroozi M, Farhadian M, Kamalinia M. Study of occupational exposure to health effects in some magnetic. Iran Occupational Health 2013; 10: 45-53.
  6. Zolfkhane H, Asgari M. The effect of electromagnetic waves on the brain [MSc Thesis]. Zanjan: Zanjan University; 2013.
  7. Zare S, Hayat Ghibi H, Alivande Farkhad S, Taghezadeh A. The effects of extremely low frequency electromagnetic fields on the level of liver enzymes in guinea pigs. Olom fonon hasteie 2006; 38: 25-30.
  8. Khaki A, Behrouz M. Effect of low density electromagnetic on heart tissue of male Rat. Journal of Gorgan University of Medical Sciences 2012; 14: 40-46.
  9. Jafar A, Sarkar S, Oghabian M. Effects of RF radiation and electromagnetic fields from M.R.I radiation on the process of follicles in adult rats. Medical Laser 2009; 3: 13-17.
  10. Shahbazi D, Kouhiyan F, Kouhiyan M, Sadeghi B. Effects of M.R.I on sex hormones and other fertility parameters in adult male rats. Shahrekord Univ Med Sci. 2011; 13: 35-41.
  11. Kavyan Nesuad R, Hadezadeh N, Mohammad Taghe R, Gharibi F. The effect of electromagnetic waves of mobile phones on blood pressure, heart rate and cardiac arrhythmia. Journal of Gorgan University of Medical Sciences 2009; 11: 22-26.
  12. Shellock FG, Crues JV. Temperature, heart rate, and blood pressure changes associated with clinical MR imaging at 1.5 T. Radiology. 1987; 63: 259-262.
  13. Chakeres DW, Kangarlu A, Boudoulas H, Young DC. Effect of static magnetic field exposure of up to 8 Tesla on sequential human vital sign measurements. J Magn Reson Imaging. 2003; 18: 346-352.
  14. Yang M, Christoforidis G, Abduljali A, Beversdorf D. Vital Signs Investigation in Subjects Undergoing MR Imaging at 8T. AJNR Am J Neuroradiol. 2006; 27: 922–928.
  15. Sayedy Zadeh A, Nasire P, Zeraate H, Jahangire R. Study of electrocardiogram changes in contact with electromagnetic fields of 50 Hz. Iranian Journal of Physics. 2007; 3: 52-43.
  16. Kim KS, Choi JL, Kwon MK, Choi JY, Kim DW. Effects of 60 Hz magnetic fields on teenagers and adults. Environmental Health. 2013, 12: 1-8.
  17. Sait ML, Wood AW, Kirsner RL. Effects of 50 Hz magnetic field exposure on human heart rate variability with passive tilting. Physiol Meas. 2006; 27(5): 73-83.
  18. Graham C, Cook MR, Sastre A, Gerkovich MM, Kavet R. Cardiac Autonomic Control Mechanisms in Power-Frequency Magnetic Fields: A Multistudy Analysis. Environmental Health Perspectives 2001; 108: 737-742.
  19. Scherlag BJ, Yamanashi WS, Hou Y, Jacobson JI, Jackman WM, Lazzara R. Magnetism and cardiac arrhythmias. Cardiol Rev. 2004; 12: 85-96.
  20. Koppel T, Vilcane I, Carlberg M, Tint P, Priiman RK. Riisik, Haldre H, Visnapuu L. The effect of static magnetic field on heart rate variability –an experimental study. Agronomy Research. 2015; 13: 765–774.

How to Cite

Kianmehr, M., Moghaddam, S. B., Mahmoudabadi, A., & Rezaeinejad, Z. (2017). Effect of MRI on ECG Parameters of Patients. Bali Medical Journal, 6(1), 169–172.




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Mojtaba Kianmehr
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Shahriar Basiri Moghaddam
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Alireza Mahmoudabadi
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Zohreh Rezaeinejad
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