PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY IN REFRACTORY UNSTABLEANGINA-PECTORIS - ARE NEW DEVICES USEFUL

This study was undertaken to assess if the introduction of new angiopl asty devices (autoperfusion balloon catheters, stent and atherectomy) could ameliorate early and late results of prompt percutaneous translu minal coronary angioplasty (PTCA) in patients with refractory unstable angina. From January 1993 to June 1995, 59 of 278 patients (14 female , 45 male; mean age: 61+/-10 years; range: 38-78) admitted to our Coro nary Care Unit with the diagnosis of unstable angina had more than one episode of chest pain at rest with dynamic electrocardiographic ST-T changes and without signs of cardiac necrosis while on medical therapy including oxygen, aspirin, heparin, nitroglycerin and either a beta-b locker or a calcium-antagonist. Coronary angiography was performed wit hin 48 h from the last ischemic attack and a culprit lesion technicall y suitable for PTCA was identified. PTCA was performed in 73 lesions. Elective stent implantation was considered for 16 type B or C lesions in 14 patients. The procedure was initially successful in 52/59 patien ts (88%), uncomplicated unsuccessful in 4/59 (7%) and complicated in 3 /59 (5%). Elective stent insertions were all successful (16/16, 100%). All successfully treated patients were followed up for a mean of 12+/ -7 months (range: 6-27): 2/52 patients (3.8%) suffered from non-transm ural myocardial infarction, 14/52 (26.9%) had a recurrence of angina a nd 2/52 (3.8%), asymptomatic, had a positive stress test. We conclude that prompt PTCA in refractory unstable angina using 1990s 'state of t he art' equipment compares favorably to previous study and that stent delivery might become the elective treatment of complex lesions in thi s subset of patients.