title: Electrocardiographic changes during chest pain in unstable angina.
mesh_terms: D000328:Adult; D000368:Aged; D000787:Angina Pectoris / Q000150:complications / Q000503:physiopathology*; D000790:Angiocardiography; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology / Q000503:physiopathology; D012306:Risk; D013909:Thorax