Would paroxysmal atrial fibrillation cause mental impairment?

Yes: Paroxysmal atrial fibrillation (afib) refers to a brief episode of irregular heart rhythm that may cause a variety of symptoms including confusion, palpitations, sweating, chest pain, nausea, vomiting, and sometime even stroke symptoms including changes in language, facial drooping, weakness, and numbness to name a few symptoms. It is important to be seen by a doctor to have a complete exam.