Can right bundle branch block cause tachycardia?
Well lets start with Donna’s answer first. “The tachycardia probably caused the BBB. when your heart rate goes so high it is causing ischemia (decreased blood supply) to your bundle branches and you might have a rate related bundle branch block.” Oh dear! It’s quite evident from the history this patient has given that it most likely isn’t rate related RBBB Now, BBB that occurs on the right side is more likely to be a variation of normal, and BBB that occurs on the left side, is more likely to be pathological. I suspect the RBBB is unrelated to your elevated HR and was just found by chance on your ECG. Given the fact your increase in HR seems to only happen at work, would strongly point towards this being an anxiety related problem. However, it’s wise to have a work up. When we see BBB on an ECG it always warrants further investigation, but it’s most likely a variation of normal. The holter monitor study is a rational suggestion.
