Background: Supraventricular tachycardia (SVT) is the most common symptomatic rhythm disorder in children with a prevalence of 1 in 250 to 1 in 1000 in healthy children. This study was conducted to determine demographic characteristics, clinical findings, electrocardiographic changes and outcome in hospitalized children diagnosed with SVT. Materials and methods: This descriptive-cross-sectional study was conducted in Shahid Motahari Hospital of Urmia. In this study, the files of all patients hospitalized in the pediatric and neonatal departments of Shahid Motahari Hospital in Urmia from the beginning of 2008 to the end of 2020 with the diagnosis of supraventricular tachycardia were evaluated in terms of the demographic characteristics of the patients, clinical symptoms and electrocardiographic changes. Also, during a phone call with the parents of the discharged cases, the long-term outcome of the patients was measured. Results: 56 hospitalized children diagnosed with SVT were examined in this study. In total, 60.7% were boys and 67.9% were under 2 years old. The most common hospitalization season was spring and they were hospitalized for an average of 6.64 days. In total, 10.7% died, 8.17% had spontaneous recovery, 4.46% experienced recovery with medication, and 25% needed electrophysiologic study (EPS). The most common clinical complaint was heart palpitations. Conclusion: The results of the present study are in most cases consistent with other studies in different parts of the world. Spring has been proposed as a common season in the occurrence of arrhythmias in line with other studies. Palpitation is the most common clinical finding of patients in most age groups. Also, sweating in infants has been a common finding.