title: Pulsus alternans during spontaneous angina pectoris.
mesh_terms: D000328:Adult; D000787:Angina Pectoris / Q000503:physiopathology*; D001794:Blood Pressure; D004562:Electrocardiography; D005260:Female; D006801:Humans; D009200:Myocardial Contraction; D011674:Pulse