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.
Even for small envelopes and light packages, USPS Priority Mail 2-Day is a better service than First-Class Mail. The price point is slightly higher, but delivery is much quicker. First-Class shipments may arrive in a day, or three days, or seven days. In contrast, Priority Mail is delivered within three days in most cases. Additionally, Priority Mail becomes the cheapest option for sending envelopes or packages that are heavy. Flat rate shipping means no increase in price with a heavier weight.