Doctors Outline 10 Causes of Fainting, Flagging Stroke and Arrhythmia Risks

6 articles · Updated · Prevention Magazine · May 16

Doctors say most fainting episodes are benign, but syncope happens when the brain briefly gets too little blood and can sometimes signal a serious heart or neurologic problem.
10 common triggers include dehydration, sudden fright, standing up too quickly, abnormal heart rhythm, heart valve problems, medication side effects, low blood sugar, flu, stroke and postural orthostatic tachycardia syndrome.
arrhythmia-related fainting is the most concerning because it can strike suddenly without warning, while stroke should be suspected when dizziness comes with weakness, numbness or trouble speaking.
Hydration, regular meals, enough sleep, and limiting alcohol and caffeine can ease routine lightheadedness; recurrent episodes or symptoms with chest pain, shortness of breath, vision changes, vomiting or near-fainting warrant medical evaluation.

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