title: Electrophysiologic studies in patients with unexplained syncope.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis; D004558:Electric Stimulation; D004568:Electrodiagnosis / Q000379:methods*; D006331:Heart Diseases / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D008991:Monitoring, Physiologic; D013575:Syncope / Q000209:etiology*