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.
Parcel Post is one of the basic retail services offered by the United States Postal Service for packages. Although slower than Priority Mail, it's typically less expensive, particularly for larger items. Businesses often make use of its commercial cousin, Parcel Select, for shipping merchandise. Weight & Dimensions.