Definition of "paroxysmal" []

• Of, pertaining to, causing or accompanied by paroxysms (adjective)

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• "The technique is most successful among patients whose rapid heartbeat comes and goes, a condition known as paroxysmal A-fib, says Sung Lee, director of cardiac pacing and electrophysiology at Washington Adventist Hospital in Takoma Park."
• "Identification: The sudden onset of unusual movements, behaviors, or spells sometime referred to as a paroxysmal disorder may catch your attention or even be brought to your attention."
• "Both the rarity and the severity of the disease make it an ideal target for Soliris, whose sole previous indication, or approved use, is for a rare blood disorder called paroxysmal nocturnal hemoglobinuria."