title: Fish oil not effective in preventing heart arrhythmias in some.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000517:prevention & control*; D001281:Atrial Fibrillation / Q000517:prevention & control; D015525:Fatty Acids, Omega-3 / Q000627:therapeutic use*; D005395:Fish Oils / Q000627:therapeutic use*; D006801:Humans; D017180:Tachycardia, Ventricular / Q000517:prevention & control; D017211:Treatment Failure
chemical_list: D015525:Fatty Acids, Omega-3; D005395:Fish Oils