Fainting
Fainting is also a common sign of tachycardia. This is caused when your brain does not get sufficient oxygen-rich blood to operate. Faster heartbeats can deprive the cognitive system of nutrients and oxygen. As a result, you can become dizzy and fainted in a short time. When you are alone, fainting can increase the risk of falling on the ground and serious head injuries. Thus, whenever you notice the first few symptoms, it is advisable to take a rest or seek help from other people. [3]
