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 can be caused by: 1  Scarring (fibrosis) of the heart's electrical system caused by aging. 2  Heart attacks. 3  Infection of the heart valves (endocarditis). 4  Complication of Lyme disease.  Sarcoidosis or 1  hemochromatosis. Use of certain medicines, especially beta-blockers, calcium channel blockers, and digoxin.