title: Sympathetic overactivity and exercise intolerance in heart failure: a cause-effect relationship.
mesh_terms: D017079:Exercise Tolerance; D006333:Heart Failure / Q000503:physiopathology*; D006801:Humans; D018482:Muscle, Skeletal / Q000294:innervation*; D010101:Oxygen Consumption; D013564:Sympathetic Nervous System / Q000503:physiopathology*