Constante, ADPereira Lemos, ATrigo, CLopes de Carvalho, IBrito, MJ2022-11-152022-11-152021Port J Pediatr 2021;52:299-302http://hdl.handle.net/10400.17/4278Lyme borreliosis with myocarditis is rare in pediatrics and diagnosis requires a high index of suspicion. We present an adolescent with myocarditis, depressed left ventricular function, and evidence of Lyme borreliosis infection. Early recognition and treatment of Lyme disease can help to avoid serious complications.engLyme Disease/complicationsLyme Disease/diagnosisLyme Disease/drug therapyMyocarditis/etiologyMyocarditis/drug therapyAdolescentHSM CAR PEDHDE INF PEDjournal article