Your racing heart, temperature swings, and constant fight-or-flight state aren't anxiety. They're dysautonomia.
If your heart races unpredictably, you feel faint when you stand, and your body won't regulate temperature, your autonomic nervous system is misfiring. This book explains why and what can help.
Inside This Volume
What You'll Learn
How the autonomic nervous system controls heart rate, digestion, temperature, and sleep -- and what happens when it breaks down
Why dysautonomia is the central mechanism behind most Long COVID symptoms, not just POTS
How vagus nerve dysfunction contributes to brain fog, GI problems, and chronic fatigue
Screening tools like COMPASS 31 to measure your dysautonomia severity
Treatment options from stellate ganglion blocks and vagus nerve stimulation to medications like ivabradine, midodrine, and pyridostigmine
Why chronic fight-or-flight destroys your deep sleep and accelerates aging
How heart rate variability (HRV) testing reveals what's happening inside your nervous system
About This Volume
From the author
Most Long COVID patients have heard of POTS — the racing heart that hits when you stand up. But POTS is only one piece of a much larger problem. Dysautonomia, the dysfunction of your entire autonomic nervous system, is what drives the dizziness, the temperature swings, the gut problems, the insomnia, and that relentless feeling of being stuck in fight-or-flight mode. Volume 2 of The Complete Long COVID Handbook puts dysautonomia at the center of the conversation, where it belongs.
Dr. Groysman breaks down the autonomic nervous system in plain language: what it controls, how COVID damages it, and why your body responds the way it does. You will learn how vagus nerve dysfunction connects to symptoms that seem unrelated — from brain fog and bloating to chronic pain and light sensitivity. The book covers diagnostic tools like autonomic function testing, HRV measurement, and the COMPASS 31 screening questionnaire, giving you concrete ways to assess where you stand.
The second half of the book is devoted to treatment. From stellate ganglion blocks and transcutaneous vagus nerve stimulation to over a dozen medications used in clinical practice, Dr. Groysman details what each treatment does, how it works at the mechanism level, and where it fits into a comprehensive recovery plan. This is not a one-size-fits-all prescription. It is a detailed map of the options available, written by a physician who has been treating Long COVID patients since 2020 and understands that every case requires its own path forward.
From the Book
"Long COVID is like a multi-car pileup; while there is a common cause, each individual experiences different 'injuries' or symptoms, requiring tailored treatments for each unique case. My goal is to help you understand what is happening inside your body, why you feel the way you do, and to validate that your symptoms are real and not merely 'in your head.'"
Dr. Robert Groysman, MD
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Understand what's happening
in your body.
Written for patients who want real answers, for patients and the clinicians who treat them.
Buy Now: $24.99Common Questions
Before You Buy
What format is this book available in?
The book is available as a digital download (PDF/eBook). A paperback edition is also available on Amazon. Once purchased through the Long COVID Family store, you receive instant access to the digital version.
Is this written for patients or healthcare providers?
Both. The series is written so that patients can understand their biology without a medical background, and so that physicians have a structured, mechanism-based framework they can use with their own Long COVID patients. Dr. Groysman specifically avoids jargon and always explains the "why" behind the science.
Do I need to read Volume 1 first?
Volume 1 introduces the full six-mechanism framework and is the recommended starting point. The mechanism-specific volumes (2–7) build on that foundation, though each volume can also stand alone if you already know which mechanism you want to explore.
What is the refund policy?
For refund and return questions, contact the Long COVID Family store directly at customer@covidinstitute.org or call (214) 390-7557. Due to the digital nature of the books, refunds are handled on a case-by-case basis.
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The Complete Long COVID Handbook (2nd Edition)
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If you developed sudden food sensitivities, unexplained flushing, rashes, or gut issues after COVID, unstable mast cells and histamine overload may be driving your symptoms.