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Doctor insights on: Does Hyperthyroidism Cause Ekg Changes

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Does injury or abnormality in CNS or cranial nerves cause EKG changes or disturbance in electrical signals? Does nerve damages above c-1 cause breathing difficulties? How can they identify which nerves are damaged? From the symptoms?

Does injury or abnormality in CNS or cranial nerves cause EKG changes or disturbance in electrical signals? Does nerve damages above c-1 cause breathing difficulties? How can they identify which nerves are damaged? From the symptoms?

The: The major nerve controlling heart rate, vascular tension, and gastrointestinal function is the vagus nerve. It is the 10th cranial nerve. It can be compressed or injured a few places between the brainstem and the chest. So, there is at least one way an injury to the neck or brainstem can relate to heart rate, ekg, and breathing. An injury "above c1" implies a brain injury. If it is located in the brainstem, it would have to be very small to be survivable. This area controls many functions that are "primitive"--that is to say, common to all animals. That would include heart rate and breathing. When we talk about brainstem injury, we talk about cranial nerve signs and "long tract" signs, meaning the extremities. By finding the intersection of the involved nerves, the area can be identified. Injuries above the brainstem can be a bit more difficult to localize. Cerebellar problems can be difficult to diagnose and often involve balance and coordination. The midbrain is a relay area of sensory and motor signals. The cerebral cortices, on the other hand, are reasonably well-mapped and those lesions can be recognized more easily. A neurologist or neurosurgeon can help diagnose and treat the problem. Often MRI is needed to help locate and diagnose the problem. To be useful, though, the images should correspond to the symptoms and exam findings.

Dr. Herman Hammerstead
3 Doctors shared insights

Electrocardiogram (Definition)

Electrocardiogram (ecg, ekg) is a print-out of the electrical forces detected by electrodes on the chest wall, as electricity travels through the heart with each heart beat. The electrodes are placed in different positions, and each position "sees" the electrical activity of the heart from its own vantage point. Abnormalities in signal detected at chest surface ...Read more


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If cardiomyopathy was bad enough to cause low fevers, cp, breathlessness and palps, would it show a sign like increased inflammatory markers, a murmur, low o2, weird BP and/or EKG changes?

If cardiomyopathy was bad enough to cause low fevers, cp, breathlessness and palps, would it show a sign like increased inflammatory markers, a murmur, low o2, weird BP and/or EKG changes?

Many forms; depends: Cardiomyopathy is a big word that means poor heart function. There are many forms of cardiomyopathies, and depending on which one you have, there are different signs and some are reversible. Hypertrophic cardiomyopathy: enlarged heart with ekg ; echo changes; viral cardiomyopathy: prodrome of viral syndrome which results in cardiomyopathy ; 50% improve; and many others. Discuss with your doctor.

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Hr is always at 104-118 even when resting what could be the cause? Hbp; palpitations;hyperthyroidism; ekg normal medications: inderal (propranolol) 10mg twice a day

Hr is always at 104-118 even when resting what could be the cause? Hbp; palpitations;hyperthyroidism; ekg normal medications: inderal (propranolol) 10mg twice a day

Hyperthyroidism: Your overactive thyroid is the cause. When that has been adequately controlled, your hr will normalize. The Inderal (propranolol) you're taking is the right drug but the dose is very small and clearly too small if your hr is still >100. Stay with your treating doc!

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What if there are EKG changes during surgery? What does that mean? I had a knee replacement surgery and my EKG had changes during, I am 59 and female.

What if there are EKG changes during surgery? What does that mean? I had a knee replacement surgery and my EKG had changes during, I am 59 and female.

Needs Follow Up: It means that you when your body was under the stress of anesthesia, your heart didn't tolerate as well as the next person. You should follow up with your primary doctor or cardiologist. Likely they will do some more testing like a stress echo.

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4yr c/o chest pain & racing HR. Hyper, hungry, nervous, irritable & sweaty like hyperthyroid vs hypo. EKG & labs WNL, TSH 5.4. Hashitoxicosis?

4yr c/o chest pain & racing HR. Hyper, hungry, nervous, irritable & sweaty like hyperthyroid vs hypo. EKG & labs WNL, TSH 5.4. Hashitoxicosis?

Hashitoxocosis?: Did you mean thyrotoxicosis? There is a thyroid disease called Hashimotos thyroiditis. The TSH of 5 is elevated, and your symptoms sound as tho they could be related to elevated thyroid function. Definitely needs to be be reviewed by you doctor.

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I've had hyperthyroidism for five years now. My latest ECG sinus tachycardia and slight left heart enlargement...What can I do or need to be aware of?

I've had hyperthyroidism for five years now. My latest ECG sinus tachycardia and slight left heart enlargement...What can I do or need to be aware of?

Echo, treat thyroid: Hyperthyroidism for extended time periods can produce both sinus tachycardia and hypertension. Hypothyroid states typically cause slo heart rates but hypertension can also be seen. High BP can result in cardiac hypertrophy (lvh), that can show up as heart enlargement. Over time this process can cause increased risk for arrhythmia/heart failure, and needs to be monitored closely.

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Have extrasystoles everyday constantly. Had EKG said normal just need lifestyle change. Can anxiety cause constant extra beats? I have severe anxiety.

Have extrasystoles everyday constantly. Had EKG said normal just need lifestyle change. Can anxiety cause constant extra beats? I have severe anxiety.

Palpitations: 26 year old lady with a past medical history of anxiety experiencing extrasystolic heartbeats continually. Anxiety does cause cardiac symptoms. However, there are several risk factors including a personal or family history of arrhythmia, family history of sudden death, and other cardiac risk factors that determine whether further workup is indicated. Get cardiology consult and ZIO Patch/Holter Mon

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Help docs! My doctor said I have a slight change in ekg. What can this be caused by?

Help docs! My doctor said I have a slight change in ekg. What can this be caused by?

ECG: Slight changes in ECG are usually of slight importance. The ECG tracing can be changed by very subtle changes in anatomy and physiology and don't always have significant import.

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What could cause transient ST\T wave abnormalities on my EKG...t wave inversion specifically. My EKGs always change some with T inversions.

What could cause transient ST\T wave abnormalities on my EKG...t wave inversion specifically. My EKGs always change some with T inversions.

Left ventricular: Left ventricular strain for a variety of possible reasonss: from left ventricular hypertrophy to strain, electrolyte abnormalities, abnormalities of the sodium channels.

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What could be the cause of change in T wave on EKG? One showed v1-3 inverted but another show upright T wave in v3?

What could be the cause of change in T wave on EKG? One showed v1-3 inverted but another show upright T wave in v3?

T wave changes: 18 years of age T wave changes may be normal. I would suggest to have complete 12 leads EKG for proper evaluation

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What causes sinus tachycardia, dizziness, and rhythm changes when standing, after eating a meal, and after waking up? Ekg and echocardiogram normal

Hypovolemia: Most likely relative dehydration to some degree. There is enhanced blood flow to the gut after a meal. This means the same blood volume has to supply more to the gut leaving slightly less elsewhere. This can exacerbate borderline dehydration leading to compensatory higher heart rate and occasional symptoms. Try drinking more water as an initial step especially in the summer heat.

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Can anxiety cause ischemic changes on ecg?

Can anxiety cause ischemic changes on ecg?

Anxiety: Anxiety is unlikely to cause ischemic changes on ECG unless the anxiety is causing hypertension and tachycardia.

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Are there any antibiotics that don't cause ECG changes?

Most do not: The new warnings about Azithromycin and Cipro (ciprofloxacin) are only directed at people with heart disease or with specific drug-drug interactions.

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I sometimes have a negative -t in lead 3 on ecg but other times it is positive, it changes every time what can cause this?

ECG: T wave changes as you describe are usually due to changes in vector forces from lead placement and respiration. Other variables also can come into play. In general we don't get excited by them.

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What can cause hyperthyroidism onset suddenly?

Usually not sudden: Most of the time, hyperthyroidism is caused by your immune system making an antibody which stimulates your gland to overproduce thyroid hormone. Most patients have symptoms for months before they are diagnosed but occasionally the onset seems sudden. Severe stress is one thing hat can trigger the onset of the problem quickly. In any case you need to see an endocrinologist.

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What are the causes of hyperthyroidism due to pitutary reasons and how common they are?

What are the causes of hyperthyroidism due to pitutary reasons and how common they are?

Very rare: The pituitary produces a hormone called TSH which tell the thyroid gland to produce thyroid hormones. If you have a tumor in the pituitary that produces too much tsh, this will lead to pituitary induced hyperthyroidism. This is very rare, apprx 1 in a million. If your initial labs suspect you have pituitary hyperthyroidism, I suggest you repeat the test as it's probably a lab error.

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Can too much exercise cause hyperthyroidism?

Can too much exercise cause hyperthyroidism?

No: Exercise does not cause thyroid dysfunction. Most common causes are graves' disease (autoimmune), adenomas (benign rumors), and thyroiditis (inflammation).

Dr. Susan Wingo
521 Doctors shared insights

Overactive Thyroid (Definition)

Hyperthyroidism, often called "overactive thyroid, " is a condition where the thyroid secretes too much of the thyroid hormones. Common symptoms include heat intolerance, increased appetite, ...Read more


Dr. Susan Wingo
554 Doctors shared insights

Hyperthyroidism (Definition)

A medical condition that lowers the level of thyroid hormone to a point where the patient has a marked ...Read more