WPW
                                        ===
þ WPW with Atrial Fib
 - Rapid, wide a fib with changing morphology
 - sometimes as fast as 300/min (maybe for a short time) - may look regular when 
   fast                                        
 - may mimic v tach - but look in all 12 leads for any irregularity to suggest a 
   fib
 - may mimic toursades, but without changing axis
 - lidocaine won't help, won't heart
 - adenosine likely will cause v fib: potent AV nodal blocker, rate goes to 600. 
 - amiodarone is part Type I and part type II and part type IV: AV nodal blocker
   DON'T give adenosine! DON'T give amiodarone. 
 - procainamide is drug of choice (or propofol and electricity)
 - atrial fibrillation with RBBB or LBBB: morphology doesn't change, can give 
   nodal blockers.