Is Your Thyroid KILLING You? Heart Disease

Thyroid & Heart Disease

High blood pressure
Low blood pressure
Slow/weak pulse (under 60 bpm)
Fast pulse (over 90 bpm at rest)
Arrhythmia (irregular heartbeat)
Skipped beats
Heart palpitations
Chest pain
High cholesterol
High triglycerides
High LDL (“bad”) cholesterol
Mitral valve prolapse
Atherosclerosis
Coronary artery disease
High C-Reactive Protein
Fibrillation
Plaque buildup
Fluid retention
Poor circulation
Enlarged heart
CONGESTIVE HEART FAILURE
STROKE
HEART ATTACK

Need I say more?

“Dana, your cholesterol is very high.”

“Dana, your blood pressure is extremely low.”

“Dana, your heart rate is too low.”

“Dana, your Cardio CRP (c-reactive protein) is far above the normal range.”

Thyroid Disease & The Heart

Within the very first hour that I spent researching the link between heart disease and hypothyroidism, I found hundreds of published scientific studies. Goose bumps rose on my arms as I stopped and stared in shock at what I had discovered.

Circulation is a scientific journal published for the American Heart Association that publishes articles related to cardiovascular diseases. In 2007 an article appeared entitled Cardiovascular Involvement in General Medical Conditions: Thyroid Disease and the Heart:[1]

The cardiovascular signs and symptoms of thyroid disease are some of the most profound and clinically relevant findings that accompany both hyperthyroidism and hypothyroidism. On the basis of the understanding of the cellular mechanisms of thyroid hormone action on the heart and cardiovascular system, it is possible to explain the changes in cardiac output, cardiac contractility, blood pressure, vascular resistance, and rhythm disturbances that result from thyroid dysfunction. The importance of the recognition of the effects of thyroid disease on the heart also derives from the observation that restoration of normal thyroid function most often reverses the abnormal cardiovascular hemodynamics.

According to the Thyroid Federation International:[2]

The heart is a major target of thyroid hormones. Any change in thyroid hormone levels will be responded to by the heart.

Too little thyroid hormone as a consequence of an underactive thyroid (hypothyroidism):

  • causes your heart to beat too slowly or irregularly, to flutter with missing or additional beats. As a consequence bradycardia may develop; this form of arrhythmia leaves your organs and tissues without enough oxygen and nutrients. Severe bradycardia can result in cardiac arrest.
  • causes your blood pressure to change. Over time, high blood pressure will develop with the consequence of developing atherosclerosis, a risk for heart attack and stroke.
  • causes your cholesterol in the blood to rise and calcification, so called plaque, to develop in your arteries and makes them stiff. All these effects increase the risk for heart attack, heart failure and atherosclerosis

T3 Thyroid Hormone & The Heart

In mainstream medicine, Levothyroxine is the most commonly prescribed thyroid hormone replacement drug, with brand names including Synthroid, Levoxyl, Oroxine and Eltroxin. Levothyroxine drugs contain the synthetic form of only ONE thyroid hormone, T4. T4 is only one portion of the thyroid hormone complex. Yes the majority of thyroid hormones produced by the human thyroid gland are T4, however T3 is the most active useable form of thyroid hormone that can be used in the cells of the body. The conversion of T4 to T3 is a critical element in this puzzle. By doctors strictly relying on T4-only medications, they are under the assumption that our bodies are properly converting the T4 to active T3. For many hypothyroid sufferers like me, our bodies don’t convert T4 to T3 properly. Please read my post Top 5 Reasons Doctors Fail To Diagnose Hypothyroidism.

TSH (thyroid stimulating hormone) is the “gold” standard for thyroid diagnosis and treatment in mainstream medicine. Traditional doctors will test TSH and sometimes T4 levels when they suspect thyroid dysfunction, however many do NOT test Free T3 levels. Many traditional doctors will NOT treat patients with natural desiccated thyroid or synthetic T3 drugs even if their patients are not doing well on their T4-only drugs. This focus on TSH and T4 in mainstream medicine is particularly disturbing to me considering the studies published linking low Free T3 levels to heart disease.

In one study, a total of 573 consecutive cardiac patients underwent thyroid function profile evaluation. Based on the results of the 1-year follow-up:[3]

“Low T3 syndrome is a strong predictor of death in cardiac patients.”

In another article published in 2010, researchers wrote:[4]

“several clinical observational studies showing the important role of a low-T3 state in the prognostic stratification of patients with Heart Failure. Independently of the parameter used, all of these studies showed that impaired T4-to-T3 conversion is associated with a high incidence of fatal events consisting of cardiac or cumulative death or of heart transplantation.”

Dr. William Davis is a renowned cardiologist and author of the #1 New York Times Bestseller Wheat Belly: Lose the Wheat, Lose the Weight, and Find Your Path Back to Health. Dr. Davis wrote an article in 2007 for Health Central, T3: The forgotten thyroid hormoneHe wrote:

What does this have to do with your heart? There’s no question that low thyroid hormone levels act as a potent risk factor for coronary heart disease. While we’ve known for years that people with congestive heart failure or are seriously ill have abnormally low T3 hormone levels, two studies have recently found that people with coronary heart disease also have low T3 levels. These two studies now raise the question of whether low T3 by itself could be associated with increased risk for heart disease.

If your doctor refuses to test Free T3 you can order your own lab testing. Yes you can!

Dana, Your cholesterol, heart rate, blood pressure, and Cardio CRP have all improved.

My primary care physician shakes his head in amazement. (I had searched for a great thyroid doctor who explored the thyroid treatment options to find what was right for me. A combination of  natural desiccated thyroid and time release compounded T3 changed my life.)

That’s amazing.

Could there be people on statin drugs and blood pressure medication right now who are actually undiagnosed hypothyroidism sufferers? Or could they be hypothyroid patients insufficiently treated for their condition? Hmmm….

All the heart disease patients lined up to visit cardiologists, could some of them actually be undiagnosed or insufficiently treated hypothyroid sufferers? Hmmm….

All the heart surgery patients, were they tested for thyroid dysfunction before the medications were prescribed and surgery performed? Hmmm….

All our loved ones who have died of heart attacks, strokes or other heart disease complications, did they ever have their Free T3 levels tested?  Hmmmm…..

According to the World Heart Federation, heart disease is the number one killer of women around the world.[5] The Thyroid Federation International estimates there are up to 300 million people worldwide, majority women, with thyroid dysfunction, yet over half are unaware of their condition.[6] Hmmm…

References:

1. Klein, I., Danzi, S. Cardiovascular Involvement in General Medical Conditions: Thyroid Disease and the Heart. Circulation 2007; 116: 1725-1735.

2. Thyroid Federation International. Thyroid and heart. Retrieved from: http://www.thyroidweek.com/en/thyroid-heart-hormones-impact-your-heart.html?CSRT=15321360963383794914.

3. Iervasi, G MD, et al. Low-T3 Syndrome: A Strong Prognostic Predictor of Death in Patients with Heart Disease. Circulation 2003;107:708-713.

4. Gerdes, A.M., Iervasi, G MD. Contemporary Reviews in Cardiovascular Medicine: Thyroid Replacement Therapy and Heart Failure. Circulation 2010;122:385-393.

5. World Heart Federation. Women and cardiovascular disease. Retrieved from: http://www.world-heart-federation.org/press/fact-sheets/women-and-cardiovascular-disease/.

6. Thyroid Federation International. Be Thyroid Aware. Retrieved from: http://www.thyroidweek.com/en/be-thyroid-aware.html.

Take Back Your Thyroid Health! Sign up and never miss a post - it's FREE


About Dana Trentini

I founded Hypothyroid Mom October 2012 in memory of the unborn baby I lost to hypothyroidism. Hypothyroid Mom is for informational purposes only and should not be considered a substitute for consulting your physician regarding medical advice pertaining to your health. Hypothyroid Mom includes affiliate links to favorite resources including the Amazon Services LLC Associates Program. Connect with me on Google+

Comments

  1. I had hypothyroid past 17 years . Now I take thyronorm 75mg. Now my problem is pulse rate is raising and bloodpressure is up and down. Please give me some advices my health.

    • Nancy Long says:

      I had hypothyroid for 10 yrs but only diagnosed 4 yrs..armour thyroid was tried for 1 years but blood pressure was high all the time..I was switched to levothyroxin, took it for a year, npr still high..I read that combining t3 & t4 works for some..I tried taking my left over med armour thyroid in am & levothyroxin at evening..I keep it 12 hours apart..my blood pressure went down immediately after the first day…I started it New Year..Am still doing it. Am so relieve that my blood pressure is now normal..o haven’t told my doctor what I did. She always objects trying new approach to treat me..Am looking for a different m.d.who is more open minded rather than sticking to the old conventional approach.

      • Dr. Irwig in Washington, DC is a fantastic and sympathetic endocrinologist who compassionately/kindly helped me get thyroid problems under control. I am grateful everyday for having crossed paths with this wonderful doctor 👨‍⚕️

      • I have been suffering with hypothyroidism for the past 20 years. It’s in my family (mother and 2 aunts). My thyroid gland was needlessly treated with a radioactive pill 20 years ago. Before my diagnosis of a thyroid condition, I had heart palpitations so bad I ended up in the emergency room. I say to every woman out there: do your own research, don’t stay with an unreceptive physician who isn’t willing to dig deeper to find the root causes of your condition. FOOD IS KEY TO TREATING THIS DESEASE. You can stop the progression, lower your antibodies that attack your body from your brain on down. You can even, in some cases, put this condition into remission. It’s an amazing journey that I started 7 months ago with the help of a very talented young pharmacist by the name of Izabella Wentz. A brilliant girl who healed herself after being exposed to the environment around the Chernobyl accident. She wasn’t diagnosed for years until she became a pharmacist and started using herself as she tested different medications and other protocols until she was successful in completely regaining her health back. Was ignored by conventional doctors while she suffered for 10 years. She is now in full remission and has helped me gain control of my health and my life. If one doctor doesn’t help you, then find a functional medicine one who can get to the root cause of the problem. Controlling T3 and T4 is key to feeling your best. Adequate nutrition, sleep, adrenal function, proper liver function, and stress management are extremely important as well as a healthy gut. Leaky gut, chemical toxicity, and improper nutrient ansorption play a huge role in the management of your thyroid condition. Read as much as you can and learn about the risks associated with inaccurate dosing of thyroid meds along with proper blood tests being done on a regular basis. Good luck to all. There is hope.

        • Can you share your diet? I have “normal” blood test results, but I have constant weight battles on a keto diet, and zero periods for 4 years. I am 25.

        • I was diagnosed with Hypothyroidism 20 yrs ago and have been on long journey trying to manage this condition. I have to ask my doctor to perform blood test for T3 and T4. If don’t ask she won’t do it. I have yet been able to get a response when inquiring about the right number for me….we have heavy discussions about a range. She can’t tell me! My sister has Hyperthyroidism and the radiation treatment. Just recently discovered heat was functioning les than it should be. After several visits and stays in the hospital, she is now equipped with a pacemaker and defibrillator and was told her thyroid problem is the cause. I’m afraid this will happen to me if I don’t get the proper dosage. Thank you for your article and list of doctors. I will be looking for a new one. Also. If you could share your diet, that would be great.

  2. Hello,
    All this talk about heart disease is new to me. I just got my thyroid removed and it was cancerous. I have been having irregular heart beat 180 bpm twice now and I am just now reading the importance of T3. What do I do? Ask my doctor to test for T3. I have never heard her talk about T3 on T4.

  3. My heart palps stopped when I raised my nature thyroid

  4. Lois Good says:

    nature thyroid?

    • Perhaps Katy meant NatureThroid, a brand name for natural dessicated porcine thyroid, similar to Amour Thyroid. Not sure, just a guess.

  5. JoCarole Carpenter says:

    I never had any heart problems until after I was dx’d with Hashimotos. Now I have a heart murmur.

  6. Something strange has happened to my TSH levels and they have gone down to .01 way below the standard, while my FT4 is at .70 nd .80 and my FT3 is at the bottom at 2.22 when taking a drug that increases FT3 it is at 2.50. My normal FT3 in the past was 3.5. When my FT3 is 2.22 to 2.50 my blood pressure goes up and my cholesterol sky rockets. This went on for two years. I think I was on the way for heart attack when my doctor finial relented and increased my Natur-throid by .o5. After the second day my blood pressure has come down from 160/78 to 121/68. I frankly am scared because of my TSH.

  7. Heart disease is not from high cholesterol, it is from inflammation. Your brain and every organ need cholesterol to work correctly.

    • I need someone to convince my Doctor of that. High Blood Pressure is another thing.

    • keith loreth says:

      Heart disease is connected to low Vitamin C and the amino acid lysine.

    • Cholesterol (the good one – HDL) is very necessary. Your brain even needs it. In this low fat, low carb obsessed world we have forgotten (or maybe been unaware) of how much fat (healthy fats – avocado, nuts and seeds, olive oil, coconut oil and others) plays a key role in brain function. The brain is made ip of nearly 60% fat. It’s essential to consume healthy fats on a daily basis. Statin medications are used to lower cholesterol FAST, but are not meant to be used as a lifelong therapy. The risks far outweigh the benefits. Hypothyroidism is associated with elevated cholesterol levels, blood pressure, hair growth, muscles pain, joint pain (arthritis), vision problems, rashes, cold intolerance, fatigue, brain fog, swollen legs and ankles, puffiness, hoarse voice, depression, difficulty focusing, insomnia, weight gain, and over 100 more issues. I was prescribed Prozac when I was first diagnosed because of my depression (luckily temporary). Little did I know then that depression is one symptom that is not usually associated with hypothyroidism. I urge everybody to educate themselves as much as possible. Read up on the latest therapies, medications, protocols, and talk with your foctor about your findings. If your doctor is not receptive and is not willing to at least try new protocols, then it’s time to move on to someone who cares more. Functional medicine physicians treat the body as a whole. Not just one broken system vs another. We are one machine with interconnected components. Medicines help if they are managed right. But you have to treat the body right with healthy eating and healthy living. You are, after all, the one who cares about yourself the most. I hope I have been of some help.

  8. I was recently diagnosed with Hypothyroidism when I started having heart palpitations for the first time in my life. First I was having pain in my neck that shoots up to ear and literally within hours the palpitations started. My blood pressure is not stable at all. It goes from low to high. When the palpitations and the neck pain start the lightheadedness sets in and the exhaustion. I mean like exhaustion like I have never experienced in my 45 years and I am a Mother of 5 children.

    I went to my first visit with the Endocrinologist and he started me on low dose levothyroxin 50mcg and I have been on it for 13 days. The palpitations are so concerning and I keep getting told that it is a sign of an overactive Thyroid but my labs show that my Thyroid is underactive.

    This is all so confusing and I am trying to educate myself on what my options are for treatment. Any advice would be much appreciated!

    Thanks so much!

    • Journey S Dell says:

      Hi, sorry to hear you are so stressed. I’ve had thyroid issues since I was a child, but only now at 72 am I spending the time to really educate myself and read a good deal about the thyroid, thyroid meds and herbs that are available. I’d suggest you take the time, right now, to educate yourself. I wish I had educated myself years ago instead of just trusting my Dr.s and maybe the autoimmune disorders, that they’ve kept me homebound for many years, would not have become so predominant. My GP MD, at my request, switched me from Synthroid to NP thyroid a few weeks ago. I’m now in my 2nd week of a low dosage of NP thyroid and I’m going to start taking the herb Ashwagandha next week. Also I see my endo for the 1st time in 2 weeks.I know all this info, meds and diet are confusing, but keep at it and have faith that it will get easier to understand what you need to do to help yourself and I’d suggest…never stop learning about what could be helpful. I’m glad I finally realized that myself.

  9. Cindy Baciak says:

    I feel that my thyroid is not working right either….so fatigued and weak….but we have high toxic chemicals aerated in in rural WIS. including chlorine…. and that screws up the iodine your thyroid needs….and you need to detox your thyroid, chlorine can stay in that gland for months…. and BP meds won’t detox your gland, and neither will thyroid meds…in my opinion….that is just one of the things that could be affecting people, also drinking chlorinated water, or swimming in chlorinated pools….

  10. Carissa Bruce says:

    I’m hypothyroid but as soon as I start any thyroid medication I get chest pains and shortness of breath. I’ve tried Synthroid and Cytomel combo and Armour. I just recently went to the doctor and I have a irregular heartbeat now as well. I’m in good shape and 36 years old. Please help! I need to take the meds but I feel like my heart can’t tolerate it. When I go off meds heart issues go away but I gain weight rapidly.

    • I am 35 years old with type 1 diabetes . About a year and a half ago ,I was diagnosed with hypo ,and for about a year ,Everything went well.
      Fast forward to now , I gained a ton of weight ,hair has fallen out ,heart palpitations are horrible ,and ….. I was over treated for many months. Before my diagnosis,I was 128 lbs at 5’5 ,and now , I’m right at 150 within 6 weeks. .
      I never feel good ,always exhausted,can’t get pregnant,and I am getting depressed.
      Living a healthy lifestyle has always been a thing for me ,and now , No matter what I do ,nothing works. My endocrinologist actually told me my thyroid wasn’t my issue and that this was all in my head. Mind you ,20 lbs in 6 weeks ,heart problems, high t3, great tsh. What should I do ?? I feel like my life has been torn away from me. .

    • Lower you dose.

    • This is exactly my situation! I have tried Naturethroid 65mcg and I started to feel better but my TSH was still a 42 after 2 weeks. My T3 was normal at that point. When my doc wanted to increase the naturethroid to help the TSH, I started getting chest pains and shortness of breath and anxiety problems. I think it’s from too much T3. I’m currently reading Dr. Arem’s book on thyroid. He’s a prominent doctor that my mom went to in 2000 to treat her hashimoto’s. There’s info in the book about how to start dosing and how to combo the meds. He says you should only increase by 25mcg a week so that you don’t get those heart/anxiety symptoms. I’m still in the learning phase though and I’m not sure if my doctor has a good plan of action…

Speak Your Mind

*