List 3 causes of an irregularly irregular pulse.
1. AF
2. Multiple VEs
3. Atrial flutter with varying block
There is nothing to discuss. This is easy marks. Multifocal atrial tachycardia is another reasonable alternative. A reader has pointed out (thank you Vinay) that Mobitz Type II 2nd degree AV block is could also be listed here; because it is also irregular, but is it irregularly irregular? The reader is left to consider what they mean by this statement.