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Doctors' Answers to "Frequently Asked Questions" - Syncope
Answer: The usual cause of syncope are either cardiovascular causes or neurologic causes. A usual workup would entail some type of long term cardiac monitoring, an EEG, carotid ultrasound and cardiac echogram looking for the source. As to the hycosamine, I'm at a loss to figure this one out.
Answer: Micturation syncope is when one passes out while/or immediately after urination. When one bears down slightly to urinate, there is a stimulus to the vagal nerve. Usually, more pronounced in men with large prostates but, potentially in anyone. The vagal nerve stimulus causes slowing of the heart. If your pulse is slow to begin with or your blood pressure is low, this can lead to passing out(syncope). It tends to repeat in patients prone to the problem. I see about 5-8 cases a year in my practice and not inherited per se. There is a tendency to have similar heart rates in families, so the predicting factors would tend to run in families.
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