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Can nervousness affect an EKG?

I had an EKG in my doctor's office. The doctor's staff had trouble getting lead  #1 to stay attached to my chest and a little trouble with two more leads. I have claustrophobia and almost could not finish the EKG. I think the test took about fifteen minutes. The test showed that I had left bundle block. Could this be a false reading due to my being very nervous?

submitted by Dan from Baltimore, MD on 2/4/2014


by Texas Heart Institute cardiologist, Maher M. Nasser, MD    

Maher M. Nasser, MD

Dear Dan,

No, being nervous does not cause left bundle branch block. It may, however, show minor artifacts. Regards,


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Updated February 2014
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