Prevalence of Cardiac Arrhythmias, Clinical Spectrum and Complications of Electrical Injury

Background: Electrical accidents (EA) are rare, but can cause serious and potentially life-threatening injuries to multiple organs. The majority of epidemiological data refers to workplace accidents which account for a significant share of such accidents in adults. Exposure to electric shock has been associated with an increased risk of developing immediate and delayed cardiac arrhythmias. Objective: To evaluate the prevalence of cardiac arrhythmias and different symptoms in patient with high voltage and low voltage electrical injury. Methods: This was observational prospective study was carried out at the Dept. of Cardiology, Bangabandhu Sheikh Mujib Medical College Hospital, Faridpur, Bangladesh from January to June 2021. 51 consecutive patients with electrical injury who were admitted. Admission criteria were age ≥15 years, loss of consciousness, cardiac arrest, electrocardiographic abnormalities, soft tissue damage and burns. Patients were categorized into high and low voltage injury group and their variables were compared. Results: The mean age of the patients was 32.3±10.4 years among them 41 (82.3%) were male. Patients who sustain high voltage electrical injury (>1000V) were 18 (35.2%) and low voltage injury (<1000V) were 33 (64.7%).Cardiac arrhythmias like sinus tachycardia (11.1% vs 6.0%, p=0.054), sinus bradycardia (11.1% vs 3.0% p=0.254), ventricular premature beats (5.6% vs3.0%, p=0.674), atrial fibrillation (11.1% vs 0%, p=0.054) were observed in high voltage and low voltage group. The commonest presenting symptoms in both groups were pain (77.8% vs 81.8% p=0.560) and fatigue (55.6% vs 39.3%, p=0.328). Conclusion: In this study few non-fatal cardiac arrhythmias were observed in both high and low voltage electrical injury group. Parameters considered to be risk factors such as known structural heart disease, loss of consciousness, high voltage electric shock, burn and soft tissue injuries were also not significant predictors of the occurrence of arrhythmias. There is no significant difference in the presenting symptoms and types of arrhythmias observed between low voltage and high voltage injury group.