25
2.2.2. Associated Arrhythmias
Fl indicates flutter; LA, le atrium; and MRT, macroreentrent.
e typical, reverse typical, and the lower-loop flutter all have the low right atrial isthmus
incorporated in the flutter circuit. Other macroreentrant flutters include scar-mediated reentrant
tachycardia and le mitral isthmus flutter. Modified with permission from Wellens HJJ.
Copyright 2002, American Heart Association, Inc.
Figure 6. Types of Atrial Flutter and Macroreentrant Atrial
Tachycardia
Typical flutter
Scar MRT
Lower loop FI
LA MRT
Reverse typical flutter
