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8 hours ago · Bradycardia in Heart & Blood Health

YES! A well-known side effect of Bystolic is bradycardia (slow heart rate). Please contact your doctor and discuss this ASAP. @warpedtrekker

Wed, Mar 18 9:46am · I'm having multiple odd episodes that are keeping me undiagnosed. Help in Brain & Nervous System

This is incorrect information. Having POTS does NOT mean that your "heart is not strong enough…" It means your sympathetic nervous system is – to use non-medical terms – out of whack. In medical terms, POTS describes a common form of autonomic dysregulation characterized by excessive tachycardia (your heart beating over 100) upon standing in the presence of orthostatic intolerance. In other words, when you stand up, your autonomic nervous system doesn't send the correct signals quickly enough to tell the blood in your lower extremities to get it back to the heart to be pumped to the brain in a timely manner.. so you may feel light headed or even faint. Let's be careful not to frighten people into thinking , if they have POTS they have a weak heart. That's wrong. Just being deconditioned is often a cause and slowly getting back in shape can turn POTS around. Please see the NIH for correct information on POTS: https://www.ninds.nih.gov/Disorders/All-Disorders/Postural-Tachycardia-Syndrome-Information-Page

Fri, Mar 13 6:11pm · Heart Rhythm Episodes - AFib; Tachycardia, High Blood Pressure in Heart Rhythm Conditions

The test is a plasma metanephrine test and it has the highest sensitivity (96%) for detecting a pheochromocytoma. However, urine tests are even more specific but a pain to do (collecting urine more than once) – so to rule in or out the possiblity of a pheochromocytoma, doctors usually order the blood test first., Then imaging shows where the tumor is, etc. I can't say if your doctor is going straight to the scan because he is pretty sure that's what you have but that's a guess…Or maybe he ran the blood work but didn't discuss it with you yet? Anyway, good luck. Nobody wants to have to have a tumor – but if you have one, these are usually very small, benign , treatable so your problem could likely be cured.

Fri, Mar 13 3:02pm · Heart Rhythm Episodes - AFib; Tachycardia, High Blood Pressure in Heart Rhythm Conditions

Yes. The tumor is a pheochromocytoma – they are quite rare but not THAT rare… and they are almost always, always benign. They can cause spurts of extremely high blood pressure..There is now an easy blood test to first rule in or out the possibility of the tumor (the little tumor can trigger spurts of adrenaline which shoot BP up). Some doctors are not aware that it is now in the medical literature that you must NOT TAKE any PPIs ( drugs for reflux or heartburn or GERD ) for several weeks before the blood test or you will get a false positive for the tumor.

Thu, Mar 12 8:49am · Functional tremors: Anyone had this? in Brain & Nervous System

To be more specific ( and please excuse typos, i'm in a big hurry due to work) – the intracellular test is a red blood cell (RBC) test which measures the level of magnesium found inside the red blood cells NOTthe magneisum just floating in the blood serum. Symptoms of low levels of magnesium in red blood cells include heart palpitations, muscle cramps, muscle tremors and twitches and more.

Thu, Mar 12 7:44am · Functional tremors: Anyone had this? in Brain & Nervous System

Low magnesium ( and, no, low mag doesn't show up on standard lab tests – only if your doc is savvy enough to run an intracellular mag test) can cause tremors and fasciculations – twitches) . Americans tend to be low in magnesium. What can make it worse? Sometimes drugs, especially proton pump inhibitors (PPIs) – any of the drugs ending in "oprazole" like lansoprazole and omeprazole and rabeprazole – brand names Aciphex, Prilosec,Prevacid.Protonix etc.

Sat, Feb 29 5:14am · Need advice: 20 year old daughter, high heart rate, dizzy in Heart & Blood Health

I would find the best electrophysiologist you can and discuss an EP study to see if the cause of her problem is with her heart. Otherwise, I would take her to an endocrinologist . The symptoms you describe are typically either cardiac, nervous system (dysautonomia) or endocrine ( I would think she might be tested for a usually benign adrenal tumor called a pheochromocytoma, which could account for most of her symptoms BUT it would go along with high and not low blood pressure, so i guess that's not a possibility).