{Reference Type}: Case Reports
{Title}: Northwest axis in the electrocardiogram - A sign of right ventricular remodeling in tetralogy of Fallot. A case report.
{Author}: Nikus K;Punkka O;Barbosa-Barros R;Daminello-Raimundo R;de Abreu LC;Pérez-Riera AR;
{Journal}: J Electrocardiol
{Volume}: 74
{Issue}: 0
{Year}: Sep-Oct 2022
{Factor}: 1.38
{DOI}: 10.1016/j.jelectrocard.2022.08.011
{Abstract}: The typical ECG changes in tetralogy of Fallot are right axis deviation, large R waves in the anterior precordial leads and large S waves in the lateral precordial leads. We present a patient with extreme deviation of the frontal QRS axis between -90° and ± 180°. The child underwent open heart surgery twice before one year of age and a third time at nine years of age. The axis change persisted into adulthood.