The axis of the ECG is the major direction of the overall electrical activity of the heart. It can be normal, leftward (left axis deviation, or LAD), rightward (right axis deviation, or RAD ...

ECG interpretation ... (1) ‘normal’—no further evaluation needed or (2) ‘abnormal’—further evaluation needed. Normal ECGs include common, training-related findings in athletes such as high QRS ...

Perhaps most importantly, the International Criteria guideline provides a clear link between specific ECG abnormalities and ... ST segment elevation is a normal repolarisation variant in black ...

Left axis deviation occurs when the QRS axis falls between -30 and -90. There are a variety of causes, including left anterior fascicular block and left ventricular hypertrophy. See the ECG basics ...

In this respect, quantitative analysis of the ECG may be needed instead of adherence to established thresholds or criteria; accordingly, it is more informative to refer to increase or decrease in ...