[Total electrical alternans and changes in auricular repolarization in a newborn infant].
A premature 3 days-old female with AV block Möbitz type II and structurally normal heart is presented. Progressive atrial abnormal repolarization was observed. Besides, transient total electrical alternans that included P wave, QRS complex, ST segment and T wave was evident. Retrospective analysis on ECG findings showed multiple metabolic and electrolytic disturbances related with this phenomenon. Hypoxia, hypothermia and long QT interval around an immature heart are particularly discussed as triggering factors.
García Hernández
N
N
Hospital de Cardiología, CMN Siglo XXI. Instituto Mexicano del Seguro Social, México, D.F.
Espinosa Caleti
B
B
D001919:Bradycardia / Q000503:physiopathology; D004200:Diseases in Twins; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000503:physiopathology*; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008564:Membrane Potentials / Q000502:physiology