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A 83-year-old male asked:

Can low vitamin b12 cause irregular heart beat?

3 doctor answers4 doctors weighed in
Dr. Oscar Novick
Pediatrics 59 years experience
B12 deficiency: Vitamin B12 deficiency can cause pernicious anemia which in turn can cause irregular heart beats.
Dr. Steven Ajluni
Cardiology 36 years experience
No: B12 is involved in blood cell formation and nervous system function. Its deficiency can result in macrocytic (large blood cell size), and a host of neurological and GI symptoms. Some feel stamina and energy level might be affected. No connection to irregular heartbeat.
Dr. Elden Rand
Cardiology 22 years experience
No: B-12 deficiency by itself would not be expected to cause an irregular heart rate. B-12 deficiency results in anemia, which may result in a faster heart rate, and increased catecholamines (such as adrenaline). I suppose the increased adrenaline could make one more likely to have pvcs. This is not a major reported problem associated with b-12 deficiency. Neuropathy would be much more concerning.

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Last updated May 12, 2017


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