RLR
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Okay, you're not suffering from atrial fibrillation. It's important not to try and match what you feel in the way of symptoms with the clinical aspects of any type of arrhythmia. It doesn't work like that. AF rarely spontaneously resolves and often requires fleccanide or similar drug to induce cardioversion to restore normal sinus rhythm.
When rising from a seated or lying position, some people can experience orthostatic hypotension depending upon certain factors that may be present. In your case, it would be understandable. It does not, however, constitute a disorder in of itself. It merely means that physiological changes in response to motions against gravity are not quick enough to maintain perfusion. The cardiac center in the brain receives feedback that induces increased cardiac force and rate in order to quickly establish equilibrium. You sense this as rapid heart rate and pounding heart. These are compensatory actions by the body and not a sign of disease. So benign palpitations of the type you and others on this forum are experiencing are in no way associated with AF.
As for sensory disturbances when looking at flourescent lighting, pure white or brilliant surfaces and such, this is a consequence of sensory sensitivity. In other words, it is a normal physiological response in most persons at a low and most often undetectable threshold. For persons whose sensory feedback is quite elevated, very strong feedback is transmitted which produces dysregulation that may present as light-headedness, dizziness, racing heart, sweating, feeling disoriented or confused, sensing an oncoming event of some unknown origin that induces apprehension or fear and even panic threshold in some instances. It is harmless.
You'll be fine.
Best regards and Good Health
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