Syncope—also called fainting, or passing out—is a sudden loss of consciousness. It can happen due to changes in the nervous system and the circulatory system and is a result of a temporary drop in the amount of blood and oxygen reaching the brain.

How do you know if your fainting spell was a sign of a more significant health concern? These ten signs can help you figure it out.


1. Fainting during or after heart palpitations

Heart palpitations feel like extra strong heartbeats or a fluttering in your chest. Rapid heart beat can cause your blood pressure to drop, which may lead to fainting. You may also experience heart palpitations if your blood sugar is too low, which can be dangerous. This is more common among people with diabetes who take medicine to increase hormone levels in the body.  

  • Heart palpitations followed by fainting may be a sign of:
  • Low Blood Sugar
  • High Blood Pressure
  • Cardiovascular disease
  • Dehydration
  • Heat Exhaustion
  • Panic or Anxiety Disorder


This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.