What Causes Healthy People to Faint?

Your heart sends signals to your brain via your vagus nerve, and it's possible that disruptions along this information highway could lead to fainting spells.

STORY AT-A-GLANCE

• The vagus nerve’s connection to your heart may be involved in triggering people to faint

• Your heart sends signals to your brain via the vagus nerve, and a disruption in these signals may be responsible for fainting

• Autonomic dysfunction is common in patients with long COVID, including symptoms like dizziness and fainting, and it’s possibl…