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Plano, TX
A 55-year-old male asked:

What is the risk of low potassium. how low potassium needs to be to cause irregular heart beat?

1 doctor answer1 doctor weighed in
Dr. Claude Brachfeld
Cardiology 40 years experience
Usually 3.3 or lower: This depends on other health issues. Other electrolyte disorders that are present might make a person more sensitive to low potassium. Certain meds, most critically digoxin, increase sensitivity to low potassium as well. Perhaps most important is the reason why postassium is low; if the abnormality is caused by a systemic illness then problems might occur even at a level of 3.4 to 3.6 or so.

Similar questions

A 36-year-old member asked:

I was told i'm anemic plus had low potassium, could this be the cause of my fast/irregular heart beat/rate?

1 doctor answer1 doctor weighed in
Dr. Jack Rubin
Nephrology and Dialysis 49 years experience
Irregular pulse: A simple answer to your question is "yes". You need to go to the physician (p) who ordered the blood test on you that found you to have a low potassium (k) as well as being anemic. A 36 year old person is not expected to have anemia nor a low k level being on no medications. You may have to serious problems, anemia and low k. See a p for a diagnosis and a treatment plan of your two problems.
Last updated Apr 26, 2014

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