12 LEAD VECTORCARDIOGRAPHY
The aim of this book is to educate users and interpreters of ECGs on how to understand and interpret Vectorcardiograms. Vectorcardiograms are not new but hitherto their derivation has been a time-consuming process. New computer technology has enabled a VCG to be derived from the conventional ECG machine which is in daily use throughout the world.
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12-lead ECG 12-lead vectorcardiogram 20 ms vector abnormal activation adult amplitude angles anteriorly appearances associated atrial axis cardiac changes clinical clockwise complex components concept criteria depolarisation derived described deviation diagnostic directed duration effect electrical electrocardiographic enlargement example fascicular block females follows forces Frank frontal plane given Heart hypertrophy illustration increase inferior myocardial infarction initial inscription interval 20 LBBB lead system leads X left anterior fascicular limb leads Macfarlane magnitude males Maximal mean measurements methods mV Figure myocardial infarction normal Note obtained oriented orthogonal patients pattern possible posterior posteriorly potential presented produce QRS loop ranges RBBB recorded resultant sagittal scalar seen shows similar spatial suggested superior Table techniques terminal tion transverse plane Type unipolar vector 1 mV vectorcardiogram vectorcardiographic loop ventricle ventricular wave wave amplitude