title: First Degree Heart Block with Multi-focal Atrial Ectopics in an Adolescent Girl Due to Hypomagnesemia.
abstract: Nutritional deficiencies are common in adolescent children and include deficiencies of both micro- and macronutrients. Magnesium is an important mineral that is essential for maintenance of numerous electrophysiological and biochemical processes in the body. We report an adolescent girl who developed an episode of syncope with first degree heart block on electrocardiography and run of multifocal atrial ectopics on 24 h holter monitoring. Serum magnesium was found to be low with decreased urinary magnesium excretion. There were no other electrolyte abnormalities. Structural heart disease was ruled out by a normal echocardiogram. The rhythm changes were attributable to nutritional hypomagnesemia and were promptly reversed on correcting the hypomagnesemia.
authors.affiliation: Department of Pediatrics, Mahatma Gandhi Medical College and Research Institute, Pillaiyarkuppam, Puducherry, India.
authors.forename: Anup John
authors.initials: AJ
authors.lastname: Thomas
authors.affiliation: Department of Pediatrics, Mahatma Gandhi Medical College and Research Institute, Pillaiyarkuppam, Puducherry, India.
authors.forename: Chandrasekaran
authors.initials: C
authors.lastname: Venkatesh
authors.affiliation: Department of Pediatrics, Mahatma Gandhi Medical College and Research Institute, Pillaiyarkuppam, Puducherry, India.
authors.forename: Palanisamy
authors.initials: P
authors.lastname: Soundararajan
authors.affiliation: Department of Cardiology, Mahatma Gandhi Medical College and Research Institute, Pillaiyarkuppam, Puducherry, India.
authors.forename: Balasubramanian
authors.initials: B
authors.lastname: Amirthaganesh
keywords: First degree heart block; hypomagnesemia; multifocal atrial ectopics