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尽管冠心病的内科疗法有了很大进展,许多病人最终还是作了冠状动脉搭桥术以重建心肌血管。1980年美国约有10-11万人作了搭桥术,耗资约20亿美元。虽然患者确能因手术受惠,生活质量也有所改善,但因术后心绞痛复发率仍达每年5％,恢复工作率也未增加,故渐渐使人感到,它也只是一种姑息治疗。在需作冠状动脉重建的患者中,有10-20％可用经皮冠状动脉扩张术(下称扩张术)
Despite advances in medical therapy for coronary heart disease, many patients eventually underwent coronary artery bypass grafting to reconstitute myocardial blood vessels. In 1980, about 110,000 to 110,000 Americans made bypass surgery at a cost of about 2 billion U.S. dollars. Although patients really benefit from surgery and quality of life has improved, but the recurrence rate of postoperative angina is still up to 5% per year, the recovery rate has not increased, so gradually people feel that it is only a palliative treatment. In patients undergoing coronary revascularization, 10-20% of the available percutaneous coronary artery dilatation (hereinafter referred to as dilatation)