Atrial Flutter with Variable Block
- Atrial flutter is typically a regular, narrow complex tachycardia with 2:1 or even higher levels of AV block. In some patients the AV block is variable; this may be either idiopathic or in the context of complete heart block.
- Irregular rhythm
- Saw-toothed baseline ‘flutter’ waves at ~300bpm
- Variable atrioventricular block (inconsistent number of flutter waves between QRS complexes)