1909- arterialocclusions arteries bloodflowvelocity cardiovascularsystem congresses coronaryarteries coronaryheartdisease coronaryocclusion coronaryvasospasm drugtherapy effectofdrugson erik etiology general hemodynamics medical methods pathology physiology rheology rheology(biology) surgery vascularsurgicalprocedures vasodilators wetterer wg300b857m2018 wg300c82571983 wg510a7861977