title: Letter: Life-threatening "vagal reaction" to physical fitness test.
mesh_terms: D000328:Adult; D005080:Exercise Test / Q000009:adverse effects*; D006323:Heart Arrest / Q000209:etiology; D006439:Hemodynamics; D006801:Humans; D008297:Male; D005082:Physical Exertion; D014630:Vagus Nerve / Q000503:physiopathology*