title: Percutaneous transluminal coronary angioplasty of one major coronary artery when the contralateral vessel is occluded.
abstract: OBJECTIVE
  In 193 patients we evaluated the safety and efficacy of angioplasty of a critical stenosis of the right coronary artery (52 patients) or the left anterior descending coronary artery (141 patients), with the contralateral coronary artery occluded and the circumflex artery being without significant stenosis.
  
  
  BACKGROUND
  Attempted angioplasty of either the left anterior descending or the dominant right coronary artery when the contralateral vessel is occluded may trigger overwhelming left ventricular dysfunction or hemodynamic collapse, or both.
  
  
  METHODS
  Immediate and late outcome (33 +/- 18 months) in the study group were compared with outcome in 214 patients who had angioplasty in both the left anterior descending and right coronary arteries and in 194 patients who had coronary artery surgery and were matched for number and location of significant lesions, ejection fraction, age, gender and study period.
  
  
  RESULTS
  Left ventricular function was normal (38%) or mildly (34%), moderately (22%) or severely (6%) compromised. There were 11 (5.7%) emergency and 5 (2.6%) elective coronary artery operations, 3 (1.6%) myocardial infarctions and 1 in-hospital death in the study group. After discharge there were 25 (13.1%) elective coronary operations, 7 (3.7%) myocardial infarctions and 9 (4.7%) deaths in the study group. The incidence of death and myocardial infarction was similar in all groups, with 80% power to detect a 7% difference in adverse events. The study group had more elective surgery before and after discharge than did the surgical control group (p = 0.02).
  
  
  CONCLUSIONS
  Dilating one major vessel when the contralateral vessel is occluded appears to be as safe as coronary surgery or two-vessel angioplasty. Incomplete revascularization in study group patients did not impair survival or increase myocardial infarction compared with the angioplasty and surgical control groups.
authors.affiliation: Department of Cardiology, Cleveland Clinic Foundation, Ohio 44195-5001.
authors.forename: A
authors.initials: A
authors.lastname: Lafont
authors.forename: A P
authors.initials: AP
authors.lastname: Dimas
authors.forename: F
authors.initials: F
authors.lastname: Grigera
authors.forename: G
authors.initials: G
authors.lastname: Pearce
authors.forename: M
authors.initials: M
authors.lastname: Webb
authors.forename: P L
authors.initials: PL
authors.lastname: Whitlow
mesh_terms: D000206:Actuarial Analysis; D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects / Q000379:methods*; D017023:Coronary Angiography; D001026:Coronary Artery Bypass / Q000706:statistics & numerical data; D003327:Coronary Disease / Q000175:diagnosis / Q000473:pathology / Q000503:physiopathology / Q000628:therapy*; D004630:Emergencies; D005260:Female; D005500:Follow-Up Studies; D017052:Hospital Mortality; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000453:epidemiology / Q000209:etiology / Q000401:mortality; D012720:Severity of Illness Index; D012769:Shock / Q000209:etiology; D015996:Survival Rate; D016896:Treatment Outcome; D016277:Ventricular Function, Left