- sinus rhythm/ sinus tach: which is interupted by PAC's; -
P wave morphology varies from beat to beat - AV conduction varies from beat to beat - rhythm is irregular - precursor to A. Fib - vagal manuevers are usually not effective; -
Digoxin is not indicated for the treatment of MAT; -
Beta blockers are to be Avoided; they worsen
bronchospasm 
