This week Consumer Reports released news that arsenic was found in brown rice, white rice, rice breakfast cereals, organic rice baby cereal, and other rice productsââmany at worrisome levelsââin tests they performed.
First-degree heart block. First-degree AV block is defined as a PR interval longer than 0.2 seconds. Each atrial activation leads to a ventricular activation with a 1:1 correspondence.
Some patients have an acquired heart block, meaning that they developed it at a point in their life, while others have a congenital heart block, meaning that they were born with it. A second degree heart block is characterized by a significant slowing of the electrical signals between the atria and ventricles. This results in blood not being pumped to the rest of the body due to not contracting when there is a blockage of the electrical signal before it reaches the ventricles. This degree of heart block has two types known as Mobitz type I and Mobitz type II.