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 Select is a USPS mail class that offers ground delivery service at very low rates for large or heavy packages. When using this mail class, shipments can weigh up to 70lbs. and delivery ranges from 2-8 days. Rates are based on distance, weight and mailpiece dimensions.