Decrease in conduction of impulse from atria to ventricles through AV node.
Manifested as a prolonged PR interval (>02s) on ECG
Drug therapy e.g. beta blockade, fibrosis of conductive tissue, Lyme disease, acute rheumatic fever, aortic valve disease, sarcoidosis, myocarditis, MI, idiopathic
None
Usually none.
ECG:
None required
Good
