Caixeta A M, Arie S, Sândoli de Brito F, Piva de Albuquerque C, Fukushima J T, Garcia D P, Bellotti G, Pileggi F
Instituto do Coração do Hospital das Clínicas - FMUSP, São Paulo.
Arq Bras Cardiol. 1996 Jan;66(1):5-9.
To determine the time course of elastic recoil (ER) in the first 15min after successful percutaneous transluminal coronary angioplasty (PTCA).
One hundred and fifty four patients, with stable or unstable angina were successfully submitted to PTCA. Coronary angiography was undertaken shortly after balloon deflation and repeated 5, 10 and 15 min thereafter. Quantitative coronary angiography was performed with the aid of an eletronic caliper. We calculated the minimal luminal diameter (MLD) and elastic recoil in all angiograms.
The average artery's reference diameter was 3.09 +/- 0.61mm and the maximal balloon diameter was 2.95 +/- 0.52mm. MLD before the procedure was 0.65 +/- 0.42mm reaching 2.23 +/- 0.55mm immediately after dilatation (p < 0.0001), and decreasing to 2.09 +/- 0.47mm at 5min (p < 0.0001), 2.01 +/- 0.47 at 10min (p < 0.0001) and to 1.91 +/- 0.56mm at 15min (p < 0.0001). ER increased during the 1st 15min after PTCA, averaging 34.29 +/- 20.40%. In the group of patients whose balloon/artery relationship was < or = 1, the total ER was 0.90 +/- 0.74mm at 15min and 1.20 +/- 0.50mm when the ratio was > 1 (p < 0.0001). We noted that ER in the group of patients with residual stenosis ranging from 30 to 50% at the immediate angiogram after PTCA was greater than in the group whose residual stenosis was less than 30%.
ER is a dynamic and progressive phenomenon taking place within the 1st 15 min after a successful PTCA. Total ER was 34.29 +/- 20.40% at 15min and was greater when balloon/artery relationship was > 1. Residual stenosis ranging from 30 to 50% in the control immediately after the procedure is a predictive factor of greater ER in the 15min following PTCA.
确定成功进行经皮腔内冠状动脉成形术（PTCA）后最初15分钟内弹性回缩（ER）的时间进程。
154例稳定型或不稳定型心绞痛患者成功接受了PTCA。球囊放气后不久进行冠状动脉造影，并在其后5、10和15分钟重复进行。借助电子卡尺进行定量冠状动脉造影。我们计算了所有血管造影中的最小管腔直径（MLD）和弹性回缩。
动脉的平均参考直径为3.09±0.61mm，最大球囊直径为2.95±0.52mm。术前MLD为0.65±0.42mm，扩张后立即达到2.23±0.55mm（p<0.0001），并在5分钟时降至2.09±0.47mm（p<0.0001），10分钟时降至2.01±0.47mm（p<0.0001），15分钟时降至1.91±0.56mm（p<0.0001）。PTCA后最初15分钟内ER增加，平均为34.29±20.40%。在球囊/动脉关系≤1的患者组中，15分钟时总ER为0.90±0.74mm，当该比例>1时为1.20±0.50mm（p<0.0001）。我们注意到，PTCA后即刻血管造影显示残余狭窄范围为30%至50%的患者组中的ER大于残余狭窄小于30%的患者组。
ER是成功进行PTCA后最初15分钟内发生的一种动态且渐进的现象。15分钟时总ER为34.29±20.40%，当球囊/动脉关系>1时更大。术后即刻残余狭窄范围为30%至50%是PTCA后15分钟内ER更大的预测因素。
