title: Chronotropic incompetence presenting as sudden sinus slowing during exercise stress test: the pathophysiological mechanisms.
authors.affiliation: Department of Cardiology, University Hospital of Heraklion, Heraklion, Crete, Greece.
authors.forename: Eleftherios M
authors.initials: EM
authors.lastname: Kallergis
authors.forename: Eleni S
authors.initials: ES
authors.lastname: Nakou
authors.forename: Emmanuel N
authors.initials: EN
authors.lastname: Simantirakis
authors.forename: Panos E
authors.initials: PE
authors.lastname: Vardas
mesh_terms: D003937:Diagnosis, Differential; D004562:Electrocardiography / Q000379:methods*; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D008955:Models, Cardiovascular; D012804:Sick Sinus Syndrome / Q000175:diagnosis* / Q000503:physiopathology*