Several years ago, a Facebook group I admin worked together to create information sheets about ME. The info sheets were created to help group members better understand ME and provide something to hand to our doctors to help them improve our care. Links to these info sheets can be found in the ME-ICC Info group’s Table of Contents. Many of those info sheets are based on information from the ME IC Primer.
One of those info sheets is aimed at cardiologists and electrophysiologist (EP) cardiologists.
Per Cleveland Clinic:
“An electrophysiologist (EP) is a doctor who’s an expert in diagnosing and treating issues with your heart’s electrical system. A type of cardiologist, they can do testing to find which area in your heart is causing a problem with your heart rhythm.”
In some cases a referral to an EP cardiologist must go through a regular cardiologist who screens for cardiac issues not related to the heart’s electrical system. In my experience, EP cardiologists are more likely to have training in dysautonomia and offer treatments that help manage some of the cardiac issues seen in ME.

In recent years, there has been a lot more research into the cardiac issues seen in ME. Much of it reaffirms what some of the expert clinicians have been discussing for many years.
In July a paper was published that did a comprehensive overview. This paper, Cardiovascular and haematological pathology in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS): A role for viruses, brought together a lot of what we currently know about cardiac issues in ME. I discussed this paper in a July article, Cardiac issues in Myalgic Encephalomyelitis.
I have again collaborated with group members to recreate the cardiac info sheet for ME using the updated knowledge provided in that recent paper. A special thanks to my husband for helping to sort through all the references and finalize the document.
PDF of the Cardiac Info Sheet found HERE. Link: https://tinyurl.com/3zxcjjpe
Some of the topics discussed includes the following:
Cardiac output reduced
Dysautonomia
Endothelial dysfunction
Venous return issues
Hypovolemia
Left ventricular issues with “small heart”
Arterial wave reflection is inversely associated with left ventricular systolic function
Clotting dysregulation & fibrinaloid microclots
Blood findings
Acetylcholine - elevated response to acetylcholine
Exertion intolerance
Abnormal Holter readings
Reduced HRV during sleep
The sheet also includes some testing and treatment information. It is fully referenced and includes forms to enter personal heart rate, blood pressure and heart rate variability data that may offer valuable insight about your heart for your cardiologist.
Please note this information is written for cardiologists and much of it may not be easily understood. If anyone is interested in helping put together a simplified version for non medical professionals, please let me know.
Someday there will be as much understanding about managing ME as there is about managing multiple sclerosis, Parkinson’s and other difficult to diagnose and treat diseases. Until then, we need all the tools we can find.
Colleen
Information provided here or in comments is not to be considered medical advice
Sources:
The National Library of Canada Cataloguing-in-Publication Data: Myalgic Encephalomyelitis – Adult & Paediatric: International Consensus Primer for Medical Practitioners. ISBN 978-0-9739335-3-6
Nunes JM, Kell DB, Pretorius E. Cardiovascular and haematological pathology in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS): A role for viruses. Blood Rev. 2023 Jul;60:101075. doi: 10.1016/j.blre.2023.101075. Epub 2023 Mar 20. PMID: 36963989; PMCID: PMC10027292.
Hi Colleen,
I know what I’m about to say may sound incongruous, & inconsiderate, but it’s occurred to me that the extensive efforts patients are virtually forced to invest to learn all about ME & how it interacts with our physiology, biochemistry, & all ten of our body systems etc, puts us in quite a unique & influential position.
And this position has been amplified as we’ve had to apply a rigorous scientific & evidence-based approach to effectively deny the psychologised diagnostic & “treatment” approach of the BPS adherents.
The end result is a highly informed, proactive Patient community more than capable of producing our own expert subject summaries that better represent the exacting patient position that’s our lived ME experience.
It’s been a monumental slog to reach our present *informed*, articulate state; but our efforts are creating a deeply sound & reliable foundation that’s capable of presenting continuing professional development opportunities for Health Professionals.
We can and are steadily shaping a comprehensive insight into ME derived from the truth of our lived experience. From the fantasy of unproven, psychologised perspective we are now able to confidently explain much of the known state of science. We’re the vanguard. It’s about time.
Best, Alida