title: Virus myocarditis in a 1-month-old boy presenting as two types of paroxysmal supraventricular tachycardia.
abstract: Herein we describe the case of a 1-month-old boy with acute viral myocarditis, who presented with two kinds of paroxysmal supraventricular tachycardia, and who was cured after medical treatment. He was brought to the emergency room with poor feeding due to fever. On the third day of hospitalization, a narrow QRS tachycardia (180-200 beats/min) was detected. Echocardiography showed a high echoic area at the atrial septum around the atrioventricular node. The patient was clinically diagnosed with acute myocarditis. The narrow QRS tachycardia was diagnosed as incessant junctional ectopic tachycardia. The patient was treated with propranolol and landiolol. The frequency of the tachycardia decreased, but a different narrow QRS tachycardia was detected on the 15th day of hospitalization on electrocardiogram (220 beats/min), which was ascribed to atrioventricular nodal re-entrant tachycardia. Atenolol was effective for the tachycardia. At 2 years follow up, cardiac function was normal and tachycardia had not recurred.
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Shuhei
authors.initials: S
authors.lastname: Fujita
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Futatani
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Kubo
authors.affiliation: Department of Virology, Toyama Institute of Health, Toyama, Japan.
authors.forename: Masae
authors.initials: M
authors.lastname: Itamochi
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yachi
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Hidenori
authors.initials: H
authors.lastname: Iwasaki
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Ayako
authors.initials: A
authors.lastname: Shimao
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Shihomi
authors.initials: S
authors.lastname: Ina
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Higashiyama
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Noboru
authors.initials: N
authors.lastname: Igarashi
authors.affiliation: Department of Pediatrics, Toyama Prefectural Central Hospital, Toyama, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Hatasaki
mesh_terms: D003384:Coxsackievirus Infections / Q000150:complications / Q000175:diagnosis*; D029822:Enterovirus B, Human / Q000302:isolation & purification*; D006801:Humans; D007223:Infant; D008297:Male; D009205:Myocarditis / Q000150:complications / Q000175:diagnosis* / Q000821:virology; D013613:Tachycardia, Ectopic Junctional / Q000175:diagnosis / Q000209:etiology; D013617:Tachycardia, Supraventricular / Q000175:diagnosis / Q000209:etiology*
keywords: Coxsackie virus B3; atrioventricular nodal re-entrant tachycardia; infant; junctional ectopic tachycardia; viral myocarditis