Objective: To determine the frequency of myocarditis in children suffering from measles. Methodology: This cross-sectional study was conducted in the Pediatrics Unit C, MTI Lady Reading Hospital (LRH), Peshawar, from December 6, 2019, to June 5, 2020. A total of 96 patients, aged 1 month to 12 years, diagnosed with measles for more than a week were included. After obtaining ethical approval, written informed consent was taken from the parents. The frequency of myocarditis was assessed using electrocardiography and echocardiography. Data were analyzed using SPSS version 22. Results: The mean age was 6.6 ± 3.06 years. Of the patients, 47.9% were male and 52.1% were female. Most children (61.5%) belonged to a middle socioeconomic status. The study revealed that myocarditis was present in 7.3% of the children, with younger age groups (1-6 years) showing significant association (p=0.028). Myocarditis was more prevalent in children from poorer socioeconomic backgrounds (p=0.05). Conclusion: Myocarditis is a frequent complication of measles, especially in younger children from low socioeconomic backgrounds. Routine screening for myocarditis in children with measles may reduce associated morbidity and mortality. Keywords: Myocarditis, Measles, Vaccination, Socioeconomic Status.
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