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Can Thyroid Issues Cause Heart Issues

How Hyperthyroidism Causes Atrial Fibrillation

Thyroid and Heart Disease

If you have atrial fibrillation, a screen to check your thyroid function is in order. Once Tomaselli diagnoses a case of atrial fibrillation, he sets out to find the cause or causes of the arrhythmia. One of his first steps is to check the patients thyroid hormone to see if an overactive thyroid is at the root of the heart problem, even though it’s not the most common cause of atrial fibrillation.

Hyperthyroidism increases heart rate and cardiac output, placing extra strain on the heart. And the most common heart condition for patients with hyperthyroidism is atrial fibrillation, according to a;study published in January 2015 in The;American Journal of Medicine. Excess thyroid hormone interferes with the hearts natural electric impulses, which can throw it out of rhythm, Tomaselli explains. Other effects of hyperthyroidism include fatigue, increased appetite, and hand tremors.

Just as with atrial fibrillation, it’s important to find the underlying cause for hyperthyroidism to determine the best treatment plan.

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Graves disease occurs when the immune system is behind the overproduction of thyroid hormone.

Type Ii Amiodarone Induced Hyperthyroidism

Amiodarone per se may cause a drug induced destructive thyroiditis in patients with no pre-existing thyroid disease . In most cases this will resolve within 34 months whether or not amiodarone is discontinued. The disturbance of thyroid function is similar to that found in other forms of destructive thyroiditis, such as de Quervain’s or postpartum thyroiditis, with a few weeks of hyperthyroidism caused by the release of preformed thyroid hormones, followed by a brief spell of hypothyroidism, and then recovery.

What Is The Thyroid

The thyroid gland is a small organ thats located in the front of the neck, wrapped around the windpipe . Its shaped like a butterfly, smaller in the middle with two wide wings that extend around the side of your throat. The thyroid is a gland. You have glands throughout your body, where they create and release substances that help your body do a specific thing. Your thyroid makes hormones that help control many vital functions of your body.

When your thyroid doesnt work properly, it can impact your entire body. If your body makes too much thyroid hormone, you can develop a condition called hyperthyroidism. If your body makes too little thyroid hormone, its called hypothyroidism. Both conditions are serious and need to be treated by your healthcare provider.

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Hyperthyroidism And Atrial Fibrillation Treatments

The most devastating aspect of atrial fibrillation is stroke, Tomaselli says. That’s because;atrial fibrillation increases the risk for developing blood clots in the heart. Doctors often prescribe anticoagulants , while they try to get the heart back to its normal rhythm and reduce this atrial fibrillation risk. They might also prescribe drugs to slow down the heart and manage the symptoms of the arrhythmia, like beta-blockers and calcium channel blockers.

Depending on the severity and persistence of the hyperthyroidism, treatment options include anti-thyroid medications, radioactive iodine, and beta-blockers, Dr. Wexler says.

One of the drugs used to treat atrial fibrillation is Cordarone , which sets the heart back to a normal rhythm. But the use of amiodarone can negatively affect the thyroid: Its high iodine content causes many cases of hypothyroidism as well as some cases of hyperthyroidism, according to Tomaselli.

Fixing thyroid abnormalities certainly makes atrial fibrillation easier to manage, Tomaselli says. If you have atrial fibrillation and hyperthyroidism along with no other risk factors, then my expectation is that well be able to fix your thyroid problem and fix your afib.

Heart Valve Defect Common In Patients With Thyroid Disease

Thyroid Disorders and Treatment

Nov. 30, 1999 — A heart valve abnormality is commonly found among people with a specific type of thyroid disease, Greek researchers report in the journal Thyroid.

M.E. Evangelopoulou and colleagues from Alexandra Hospital at Athens University School of Medicine, say doctors should look for the heart valve problem, known as mitral valve prolapse or MVP, in patients with autoimmune thyroid disease. Autoimmune thyroid diseases, such as Graves’ disease and Hashimoto’s thyroiditis, are conditions in which the body acts against substances such as proteins produced by the thyroid gland.

MVP is a disorder in which the mitral valve does not close properly and allows blood to leak into the left atrium of the heart. MVP is found in about 5% to 15% of people under age 40 but is most common among very thin women.

Graves’ disease is characterized by an enlarged thyroid gland and protrusion or bulging of the eyes. Over time, the disease can destroy the thyroid gland. Hashimoto’s thyroiditis also is characterized by an enlarged thyroid and an autoimmune reaction to proteins produced in the thyroid. Both diseases occur much more frequently in women than in men.

MVP was found in 28% of patients with Graves’ disease, in 23% of patients with Hashimoto’s thyroiditis, and in 10% with nonautoimmune goiter. MVP was not present in any members of the healthy group.

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What Treatments Will I Need

The overall goal is to get thyroid hormone levels back to normal. But since AFib raises your odds of having a stroke, the first step is to get your heart under control.

AFib treatment. To control your heart rate, you may get medicines like:

  • Beta-blockers, usually the first choice
  • Calcium channel blockers, if you can’t take beta-blockers
  • Digoxin, a more likely option if you also have heart failure

Depending on your overall health and how likely you are to have a stroke, you might also get drugs to lower your chances of a blood clot. Common options include anticoagulants such as warfarin , apixaban , dabigatran , and rivaroxaban .

Thyroid treatment. There are usually two steps here. You start with anti-thyroid drugs that prevent your thyroid from making too much hormone. You usually see improvement within 2 weeks.

These drugs help settle things down, but they’re not usually a long-term solution. For one thing, they may not work as well over time. And with continued use, they can have serious side effects, including liver damage.

That’s why the second step is often a treatment called thyroid ablation. You usually take one pill of radioactive iodine, which destroys your thyroid. After that you’ll need to take a daily thyroid replacement hormone.

For some people, removing the thyroid also prevents AFib.

Levothyroxine Linked To Heart Risks In Patients With Thyroid Cancer

Ariela KatzTargeted Therapies in Oncology

A study presented at the 2017 Cancer Survivorship Symposium revealed a long-term cardiovascular risk associated with administration of levothyroxine.

Dong Wook Shin, MD, DrPH, MBA

A study presented at the 2017 Cancer Survivorship Symposium revealed a long-term cardiovascular risk associated with administration of levothyroxine. The risk of coronary heart disease and ischemic stroke was found to be higher in patients with thyroid cancer who received a thyroidectomy, and levothyroxine dosage appeared to play a major role in that risk.1

This is particularly noteworthy in the current context of recent controversy surrounding the overdiagnosis of thyroid cancer. In most industrialized countries, the incidence of thyroid cancer has significantly increased in recent decades, said investigator Dong Wook Shin, MD, DrPH, MBA. In Korea in particular, we have observed a 10-fold increase in the past decade alone. This drastic increase in incidence rates has caused concerns regarding overdiagnosis and, consequently, overtreatment. Therefore, according to Shin, assistant professor of the Cancer Survivorship Clinic at Seoul National University Cancer Hospital, Korea, balancing the benefits and harms of thyroid stimulating hormone suppression is an important issue.

As addressed by recently revised guidelines, the results of our study call for more caution for the type of thyroidectomy chosen and TSH suppression therapy, Shin concluded.

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What Are The Symptoms Of Hyperthyroidism

The symptoms of hyperthyroidism can vary from person to person and may include

  • Nervousness or irritability
  • Imaging tests, such as a thyroid scan, ultrasound, or radioactive iodine uptake test. A radioactive iodine uptake test measures how much radioactive iodine your thyroid takes up from your blood after you swallow a small amount of it.

Your Thyroid Might Be Causing Congestive Heart Failure

Can thyroid disease cause atrial fibrillation?

    Your thyroid is a small but mighty gland at the base of your throat that produces important hormones that act on nearly every cell in your body. The thyroid is most well known for its primary function, which is to regulate metabolism and protein synthesis. Did you know that the thyroid also influences heart function and that thyroid problems can lead to issues with the heart?

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    Effects Of Thyroid Hormones On The Cardiovascular System

    The thyroid secretes two active hormones: thyroxine which is a prohormone and tri-iodothyronine which acts as the final mediator. In hyperthyroidism there is excessive production of T3, owing to hypersecretion by the thyroid gland, and an increase in the peripheral monodeiodination of T4, which leads to profound changes in the cardiovascular system through both nuclear and non-nuclear actions at the cellular level.

    The interrelation between the direct and indirect actions of T3 on the peripheral circulation and the heart is shown in fig .Myocardial contractility is increased as a result of a change in the synthesis of myosin heavy chain protein from the to the form, increased transcription of the calcium ATPase gene, and enhanced calcium and glucose uptake. These changes make contraction less efficient and increase heat production. Afterload is reduced, with a reduction of as much as 5070% in systemic vascular resistance, caused by the direct effects of T3 and the indirect effects of excess lactate production on vascular smooth muscle. Blood flow, particularly to skin, muscle, and heart, is therefore greatly increased. The preload of the heart rises because blood volume is expanded owing to increases in the serum concentrations of angiotensin converting enzyme and erythropoietin, with resultant increases in renal sodium absorption and red cell mass.

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      How Hyperthyroidism And Hypothyroidism Affect Your Heart

      The thyroid gland plays an important role in your bodily functions. If it does not function properly, it can significantly influence your daily life. ;

      The hormones it releases affect the organs in your body, which includes your heart. ;The hormones influence your heartbeat activity. This includes how fast or slow your heart beats and the level of force it uses to pump blood throughout your body.

      Due to the thyroids function, both hyperthyroidism and hypothyroidism can lead to serious cardiac problems. Here are the two heart conditions that problems with your thyroid can lead to:

      • Tachycardia can be developed if you have hyperthyroidism. It is an ailment that affects your heartbeat. It causes your heart to move much faster than it is supposed to when your heart is at rest. There are several situations wherein your heart will normally increase like:
      • Doing physically strenuous activities like running, lifting, or swimming
      • Experiencing physiological responses in case of trauma or stress

      When you are not doing or experiencing these, your normal heart rate as an adult should be from 60 to a 100 beats per minute while at rest.

      Tachycardia can cause you to experience several physiological symptoms like a feeling of palpitations and a racing heartbeat.

      These symptoms can lead to alarming health conditions, which include:

      • Cardiac arrest,
      • Heart failure, and
      • Stroke
      • Weakness
      • High blood pressure

      Can Your Thyroid Cause Sleep Problems

      Could it be My Thyroid?

      Thyroid imbalances have been linked to sleep problems. Hyperthyroidism can cause difficulty sleeping due to arousals from nervousness or irritability, as well as muscle weakness and constant feelings of tiredness. An overactive thyroid may also lead to night sweats and frequent urges to urinate, both of which can disrupt sleep.

      People with hypothyroidism , on the other hand, often experience trouble tolerating cold at night and joint or muscle pain that disrupts sleep. Some studies have linked an underactive thyroid to poor quality sleep, longer sleep onset or the time it takes to fall asleep and shorter sleep duration during the night. Younger people, individuals with a relatively low body mass index, and women are all considered at higher risk of developing sleep problems due to hypothyroidism.

      Hypothyroidism can also cause hypersomnia, or the irrepressible need to sleep or lapses into sleep that occur on a daily basis. Hypersomnia can occur due to an underlying medical disorder, and hypothyroidism is considered the leading cause of hypersomnia due to a disorder in the endocrine system. Additionally, untreated hypothyroidism can be mistaken for sleep-related hypoventilation, or excessively slow or shallow breathing that occurs primarily during sleep.

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      Your Thyroid And Your Heart

      Your thyroid is a butterfly-shaped gland located in your neck, and it manufactures and releases several hormones that influence your overall health and wellness. Your thyroid hormones play a big role in growth and development, and they also help regulate your metabolism.;

      One of their primary roles is to help regulate the way your organs function. While just the right amount of thyroid hormones keep your organs running smoothly, when the level of thyroid hormones is too high, it speeds up organ function, making your organs work harder than they should.

      If you have an overactive thyroid, it can speed up your heart function, making your heart beat too quickly. Over time, hypothyroidism can wear out your heart, leading to whats known as high-output heart failure.

      Do You Feel Short Of Breath Lately And Wonder If Its A Low Thyroid Causing This Or All In Your Head Even Though You Have Not Been Diagnosed With Hypothyroidism

      Usually, when someone has a new-onset situation of unexplained shortness of breath, the first thing they suspect is a heart condition.

      But if low thyroid runs in your family, or you have other symptoms suspicious for low thyroid such as unexplained weight gain, hair loss and feeling cold when everyone else feels fineyou may end up immediately suspecting low thyroid function for feeling shortness of breath in the absence of physical exertion.

      Shortness of Breath: Low Thyroid or Mental?

      No, it probably isnt mental, begins Susan L. Besser, MD, with Mercy Medical Center, Baltimore, and Diplomate American Board of Obesity Medicine and board certified by the American Board of Family Medicine.

      If your thyroid isnt functioning, your metabolism will slow down, so everything become sluggish, continues Dr. Besser. You also may develop heart arrhythmias. These things can cause you to feel short of breath.

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      Amiodarone Induced Thyroid Disease

      Amiodarone is a lipid soluble benzofuranic antiarrhythmic drug that has complex effects on the thyroid and may interfere significantly with thyroid hormone metabolism., Owing to its high iodine content amiodarone may cause thyroid dysfunction in patients with pre-existing thyroid disease; it can also cause a destructive thyroiditis in patients with an inherently normal thyroid gland. The combined incidence of hyper- and hypothyroidism in patients taking amiodarone is 1418% and, because of its extraordinarily long half life, either problem may occur several months after stopping the drug.

      Understanding Congestive Heart Failure

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      Your heart has four chambers two upper and two lower. The upper half has two cavities that receive blood, which is passed to the lower two ventricles responsible for pumping blood throughout the body.;

      Congestive heart failure develops when the ventricles that receive blood from your atrium cant keep up with the pumping power necessary to circulate the blood back to your organs and tissues. As a result, blood and other fluids accumulate in your lungs, stomach, liver, and lower body.

      While coronary artery disease is the most common cause of congestive heart failure, thyroid problems may contribute to weakening the heart. The most common symptoms of congestive heart failure are:

      • Swelling of the legs, ankles, and feet due to fluid accumulation
      • Shortness of breath

      Symptoms tend to get worse over time.

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      How Long Does It Take To Recover From Thyroid Surgery

      It will take your body a few weeks to recover after your thyroid is surgically removed . During this time you should avoid a few things, including:

      • Submerging your incision under water.
      • Lifting an object thats heavier than 15 pounds.
      • Doing more than light exercise.

      This generally lasts for about two weeks. After that, you can return to your normal activities.


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