I was recently diagnosed with a b12 deficiency, my heart had been running fast with missed beats. After my fourth b12 injection my heart went into svt, and I was hospitalised. Is this linked to a b12 deficiency? Im now on beta blockers and waiting to see cardiologist. Thanks
Hello, Vitamin b12 deficiency or excess will not directly result in ST, so be reassured for the same. Beta blocker is one of the safest Chat Doctor.  There are many reason of SVT and depending on the subtype, an evaluation and specific treatment should help in prevention of further recurrence.  Regards