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 list of medical condition causes of Left axis deviation of QRS complex on ECG (LAD) includes: 1  Left anterior hemiblock. 2  Wolff-Parkinson-White syndrome. 3  Inferior myocardial infarction. 4  Ventricular tachycardia. 5  Left anterior hemiblock.