Normality that is abnormal.
Supernormal conduction is defined as better-than-expected conduction in patients with depressed conduction during a short interval in the ventricular cycle. It is mainly observed in long-duration electrocardiogram (ECG) assessments. Its occurrence during 12-lead ECG is uncommon and its interpretation demands knowledge on electrophysiological alterations that are hard to understand. By reporting this case we aim to propose a rationale sequence that should be considered when facing an ECG with these same features, which would enable a greater accuracy to make a definitive diagnosis.
Electrocardiology Sector, Central Institute of Clínicas Hospital, Faculty of Medicine, University of São Paulo (HCFMUSP), Brazil.
Acácio
A
Fernandes-Cardoso
Electrocardiology Sector, Central Institute of Clínicas Hospital, Faculty of Medicine, University of São Paulo (HCFMUSP), Brazil.
Gabriel Afonso
GA
Dutra-Kreling
Electrocardiology Sector, Central Institute of Clínicas Hospital, Faculty of Medicine, University of São Paulo (HCFMUSP), Brazil.
José
J
Grindler
Design of Studies and Scientific Writing Laboratory in the ABC School of Medicine, Santo André, São Paulo, Brazil. Electronic address: riera@uol.com.br.
Andrés Ricardo
AR
Pérez-Riera
D001145:Arrhythmias, Cardiac / Q000145:classification* / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
Atrial premature beat; Bundle branch block; Linking phenomenon; Supernormal conduction