Suffering from malnutrition due to severe allergies and inability to metabolize most compounds in foods. Hypothyroid, unable to take meds for this (heart failure and othe) Able to munch on leaves of dulse which contains iodine and other minerals. Question is: what nutrient deficiency could cause various types of arrythmia such afib, SVT etc... Or could it be the hypothyroidism? If the latter, what could help since unable to take meds for this??