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Autoimmune & Complex

Heart Palpitations: When Your Heart Races and Doctors Say 'It's Anxiety'

Dr. Nicole Rivera·January 16, 2026·7 min read

The short answer

Heart Palpitations: When Your Heart Races and Doctors Say 'It's Anxiety'

Heart palpitations are terrifying — and dismissing them as 'just anxiety' misses potentially treatable root causes.

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Heart Palpitations Are Not "Just Anxiety"

Racing heart, skipped beats, pounding chest — while anxiety can cause these, stopping there means missing treatable conditions.

Root Causes to Investigate

  • Magnesium Deficiency — 75% of Americans are deficient; standard blood tests miss intracellular deficiency
  • Thyroid Dysfunction — complete thyroid panel is essential
  • Histamine Intolerance — excess histamine directly stimulates heart rate
  • Dysautonomia / POTS — inappropriate heart rate responses
  • Electrolyte Imbalance — potassium, calcium, sodium
  • Stimulant Sensitivity — caffeine, medications, supplements
  • Mitral Valve Prolapse — common structural variant

Our Cardiac Investigation Protocol

  1. Complete electrolyte and mineral panel (including RBC magnesium)
  2. Full thyroid panel
  3. Histamine and mast cell markers
  4. Autonomic testing for dysautonomia
  5. Nutrient repletion — magnesium, potassium, CoQ10
  6. Nervous system regulation — vagus nerve exercises, meditation

Also read: POTS syndrome treatment | Blood clot prevention

Find the root cause of your palpitations →

heart palpitations
heart health
anxiety
magnesium
dysautonomia
Dr. Nicole Rivera

Medically reviewed by

Dr. Nicole Rivera

Last updated January 16, 2026

Dr. Nicole Rivera is the co-founder of Integrative You and host of the Integrative You podcast. She has spent 15+ years in root-cause clinical practice, working with hormonal collapse, Lyme, mold, gut and autoimmune patterns.

  • Doctor of Chiropractic (DC)
  • IFMC certified
  • Training with IFM, Klinghardt, Kresser and Shoemaker
  • Member of the clinical medical board for Applied Functional Medicine
  • Clinical focus: epigenetic and DNA precision medicine
  • Clinical focus: hormonal health and women's medicine

Topics she covers

Mold illness & CIRSLyme diseaseHeavy metalsAnxiety & the nervous systemGut healthHormones & thyroidAutoimmune & skin

Sources

  • Generalized anxiety disorder: what you need to know — National Institute of Mental Health
  • Psychological and pharmacological treatments for generalized anxiety disorder — Cognitive Behaviour Therapy
  • Thyroid function tests — American Thyroid Association
  • Hormone testing before hormone therapy — American College of Obstetricians and Gynecologists
  • Blood clots: signs, symptoms and risks — CDC
  • Postural orthostatic tachycardia syndrome (POTS) — NIH/NINDS
  • Stroke: signs, symptoms and prevention — CDC
  • Migraine — NIH/NINDS
Full bio and credentials Hear her on the podcast

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