What are the reasons for palpitations and dizziness?

Hello,

Welcome to icliniq.com. There are various reasons for having palpitations followed by dizziness. The most important one being an abnormal heart rate or rhythm which starts suddenly and terminates abruptly. This could be detected by different monitors that you can carry with you and these devices can pick up the abnormal heart beats. Second of all is a thyroid disease. Excessive thyroid hormones can cause stimulation of sympathetic nervous system and you will feel hot, flushed with palpitations. Weight loss and diarrhea along with excessive appetite may also occur. Last but not the least is the most common type and is called as vasovagal phenomena. It happens when you suddenly change position from sitting to standing; your body does not have enough time to compensate and you may feel having racing heart beats followed by dizziness. A panic attack is a diagnosis of exclusion and I would not jump to this conclusion as of now. I believe that you experienced the last type I mentioned above that is vasovagal. If you get another episode then I would suggest seeing a cardiologist. Try cutting down the caffeine intake (including soda and other caffeinated beverages), I request your doctor to check your thyroid profile.