1 Most episodes of acute lower back pain are caused by muscle strain, such as from lifting a heavy object, a sudden movement or a fall. 2  The low back pain can be very severe and last for several hours, several days or even a few weeks.
3. Characteristics of the Normal ECG. It is important to remember that there is a wide range of normal variability in the 12 lead ECG. The following normal ECG characteristics, therefore, are not absolute. It takes considerable ECG reading experience to discover all the normal variants.
EKG is definitly more accurate! At least for my tele floor, our regular telemetry monitoring uses 5 leads, and the monitor shows a max of 2 leads at a time. Depending on where in the heart the MI occurs, it may not be visible on regular monitoring. We do 12 lead EKGs, so it shows 12 views of the heart at the same time.