Left axis deviation (LAD) is a condition whereby the mean electrical axis of ventricular contraction of the heart lies in a frontal plane direction between -30Â° and -90Â°. This is reflected by a QRS complex positive in lead I and negative in leads aVF and II.
Package (or thick envelope) A package is a parcel (or box) less than 84 inches when you add the length plus girth. Length is the longest side of a package. Girth is the distance around the 2 smaller sides of a package. A thick envelope is a large envelope exceeding 3/4 inch thickness.
USPS First Class vs Priority vs Express Mail . The difference between USPS First Class, Priority and Express Mail is in the duration they take to deliver the item, and naturally, the related costs. If you do not know, these are the names of three of the most popular services from USPS, the United States Postal Service.