After 100 years, the 12-lead electrocardiogram (ECG) remains the most accessible ... and then find the most positive or most negative ST-segment deviation to determine the direction of the ST ...

Note that the first three account for almost 90% of ECG tracings with LAD. If the QRS is predominantly negative in lead I and positive in lead aVF, then the axis is rightward (right axis deviation).

The standard ECG has 12 leads. Six of the leads are considered ... as defined below. Wave: A positive or negative deflection from baseline that indicates a specific electrical event.

The study of 500 patients found a false positive reading between ... fellow at Henry Ford Hospital and lead author of the study. "So when the EKG shows left ventricular hypertrophy, it doesn ...