title: ST-segment alternans during percutaneous transluminal coronary angioplasty.
mesh_terms: D000787:Angina Pectoris / Q000503:physiopathology / Q000628:therapy; D000800:Angioplasty, Balloon / Q000009:adverse effects*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D011674:Pulse