chronic paroxysmal atrial fibrillationlone paroxysmal atrial fibrillationparoxysmal atrialparoxysmal atrial fibrillation ecgpheochromocytoma paroxysmparoxystic atrial fibrillationparoxysmal hypertensionpaf paroxysmal atrial fibrillationparoxysmal atrial flutterparoxysmal nocturnal diseaseepisodic atrial fibrillationperiodic atrial fibrillation