AXE QRS
en 1 ou 2 coup d'oeil
http://www.ecglibrary.com/axis.html


Premier coup d'oeil : En utilisant D1 et AVF, l'axe du QRS peut donc être placé dans un des quatres cadrans

Second coup d'oeil : Si l'axe est dans le cadran gauche, utilisez D2 pour affiner le résultat




both D1 and aVF positif = normal axis
both D1 and aVF négatif = axis in the Northwest Territory
lead D1 négatif and aVF positif = right axis deviation
lead D1 positfi and aVF négatif
---- D2 + = normal axis
---- D2 - = left axis deviation

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causes of a Northwest axis (no man's land) emphysema hyperkalaemia lead transposition artificial cardiac pacing ventricular tachycardia	causes of right axis deviation normal finding in children and tall thin adults right ventricular hypertrophy chronic lung disease even without pulmonary hypertension anterolateral myocardial infarction left posterior hemiblock pulmonary embolus Wolff-Parkinson-White syndrome - left sided accessory pathway atrial septal defect ventricular septal defect	causes of left axis deviation left ventricular hypertrophy is not a cause left axis deviation left anterior hemiblock Q waves of inferior myocardial infarction artificial cardiac pacing emphysema hyperkalaemia Wolff-Parkinson-White syndrome - right sided accessory pathway tricuspid atresia ostium primum ASD injection of contrast into left coronary artery