ORIGINAL ARTICLE

Effect of MRI on ECG Parameters of Patients

Mojtaba Kianmehr, Shahriar Basiri Moghaddam, Alireza Mahmoudabadi, Zohreh Rezaeinejad

Mojtaba Kianmehr
Department of Medical Physics, Faculty of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran.

Shahriar Basiri Moghaddam
Department of Electrical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.

Alireza Mahmoudabadi
Department of Radiology, Faculty of Medicine, Gonabad University of Medical Sciences, Gonabad, Iran.

Zohreh Rezaeinejad
Department of Nursing, Faculty of Nursing and Midwifery, Gonabad University of Medical Sciences, Gonabad, Iran.. Email: zohreh.rezaeinejad@gmail.com
Online First: March 13, 2017 | Cite this Article
Kianmehr, M., Moghaddam, S., Mahmoudabadi, A., Rezaeinejad, Z. 2017. Effect of MRI on ECG Parameters of Patients. Bali Medical Journal 6(1): 169-172. DOI:10.15562/bmj.v6i1.375


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. 

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