Required Documents for a CDL. You will need to take the originals of all these required documents: Out-of-state CDL or New Mexico driver license. Proof of Identification number. Commercial Driver Medical Certificate and/or any medical waiver issued; Proof of identity (including date of birth),
Heart block typically causes lightheadedness, fainting, and palpitations. Depending on the severity of the heart block, this can be dangerous. For example, a third-degree heart block can worsen pre-existing conditions, such as heart failure. It can cause loss of consciousness and even sudden cardiac arrest. There can also be chest pain.
Heart block is a relatively common problem affecting the heart's electrical system. Heart block â also called atrioventricular block, or AV block â is one of the two major causes of bradycardia (slow heart rate). Read about sinus bradycardia, the other major cause of bradycardia.