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My 8 yr. old son keeps passing out!
I have an 8 yr. old son that was recently diagnosed with Sinus Arrhythmia. He has dizzy spells and often faints. I am terrified that he will end up seriously injuring himself. I am told this condition is normal and that he will grow out of it? I could really use some detailed info.
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Who told you this was normal?  What tests were done, and by whom?
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1124887 tn?1313758491
Hi,

Sinus arrhythmia is a normal phenomenon in every child.

I hope your doctor knows what he's doing. There are two possibilities. Fainting after standing for a long time or during rest, is usually caused by vagal hyperactivity that causes a drop in the blood pressure, usually with a slow heart rate. This is more or less normal. Diagnosis is usually confirmed with a head up tilt table test, where he's "flipped" from supine to standing position when EKG and blood pressure is measured.

Fainting with activity or high heart rate is almost never benign. There are conditions that doesn't give symptoms, that aren't necessarily visible on EKG during rest, but that causes severely high heart rate and fainting (various arrhythmias / paroxysmal tachycardias). A few of them are dangerous and needs treatment. One of them is often misdiagnosed as epilepsy.

If your son is fainting with activity, I would strongly recommend that you see an experienced cardiologist or electrophysiologist. We are not doctors and can't give your son any diagnosis, but I know fainting with activity is something that should be taken seriously.



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967168 tn?1343732745
please ask his pediatrician for a tilt table test to see if they can find what's going on with his system - most likely it's due to his autonomic nervous system(autonomic dysfunction) and can involve the heart in some cases

I first started fainting and had arrhythmia's when I was around 9 and it took until I was 42 for a doctor to take me seriously and found mine were connected.

Here's a great link with some info on fainting(syncope) and heart: http://www. cccgroup. info/neurosyn. asp  - take out the spaces; it won't post if I don't space it
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