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Aim: The optimal treatment for foetal supraventricular tachycardia (SVT) in twin pregnancies is unclear because of the possible impact on the second twin. This review compared a foetus we treated with antiarrhythmic drugs with the previous case studies., Methods: Our case was a dichorionic diamniotic twin pregnancy, where one twin developed foetal hydrops secondary to SVT at 22 weeks of gestation. We searched PubMed to look for previous cases of SVT in twin pregnancies., Results: Treatment with transplacental antiarrhythmic therapy from 22 to 36 weeks of gestation successfully resolved the SVT in our affected twin without any impact on the healthy twin or mother. We only found seven similar cases of SVT in twin pregnancies from 1999 to 2017. Although there was no consensus on the treatment that should be provided, none of the studies reported side effects in the twins or the mothers., Conclusion: Despite a lack of data on SVT in twin pregnancies, our case, and the previous cases we identified, allowed us to conclude that transplacental antiarrhythmic treatment can successfully achieve cardioversion in the affected twin. It can do this without side effects for the healthy foetus or the mother, even if the treatment lasts for a long period of time., (©2019 Foundation Acta Paediatrica. Published by John Wiley & Sons Ltd.)

Aim: This retrospective study reviewed the prevalence and long-term prognosis of children aged 0-18 with palpitations who were admitted to the emergency department (ED) of an Italian paediatric hospital., Methods: We examined all admissions to the ED of the IRCCS Burlo Garofolo between January 2009 and December 2015 by selecting triage diagnoses of palpitations. The hospital discharge cards were reviewed to assess vital parameters, physical examinations, diagnostic tests, cardiology consultations and final diagnoses., Results: Of the 142 803 patients who attended our ED for any reason, 96 (0.07%) complained of palpitations. Despite this low prevalence, it was noteworthy that 13.5% had a real underlying arrhythmic cause and needed medical assistance. Over half (52.1%) were women and the mean age was 12.7 years. At the long-term follow-up, at a mean of 47 ± 23 months, 53.8% of patients with a cardiac arrhythmia had received medical therapy and 46.1% had undergone trans-catheter ablation for supraventricular tachycardia. A heart rate above 146 beats per minute or palpitations for more than an hour was statistically related to a cardiac arrhythmia., Conclusion: Palpitations were an infrequent cause of admission to our ED, but 13.5% who displayed them had an underlying cardiac arrhythmia., (©2018 Foundation Acta Paediatrica. Published by John Wiley & Sons Ltd.)