The Demarc Pre-Wire is not interfaced into the local access providers's side of the Demarcation Point and thus is not a demarc extension. Patch Cord Testing. A demarc extension by definition is a complete channel, which can include patch cords or cross connects.
Answer: Left Axis Deviation (LAD) refers to the pattern of electrical activation that occurs in the heart. LAD is an EKG-specific finding and not necessarily indicative of any specific cardiovascular condition. was recently found to have Left Axis Deviation (LAD) on my EKG. General responses to selected questions from Joel Braunstein, MD, of Johns Hopkins University and Joseph Toscano, MD.
The diagram below illustrates the relationship between QRS axis and the frontal leads of the ECG. 1  Normal Axis = QRS axis between -30Â° and +90Â°. 2  Left Axis Deviation = QRS axis less than -30Â°. 3  Right Axis Deviation = QRS axis greater than +90Â°. 4  Extreme Axis Deviation = QRS axis between -90Â° and 180Â° (AKA âNorthwest Axisâ).