药物球囊也可用于冠脉大血管!阜外医院乔树宾等研究

2022-08-28 中国循环杂志 中国循环杂志

目前药物涂层球囊治疗冠状动脉原发大血管病变的相关研究较少,主要原因是,单纯经皮冠状动脉成形术后约 3%早期发生血管急性闭塞,一旦发生冠状动脉急性闭塞,可致急性心肌梗死甚至是死亡。

目前指南推荐药物涂层球囊主要用于小血管病变、支架内再狭窄病变、分叉病变及高出血风险人群,是否也可用于冠状动脉大血管原位病变?

近日,中国医学科学院阜外医院乔树宾、刘蓉等进行的研究表明,药物涂层球囊治疗也可用于治疗冠状动脉大血管(直径≥ 3.0 mm)原发病变。

这项研究连续纳入了137例患者,共有 143 处冠状动脉大血管原发病变。

其中,13 处(9.1%)为 A 型病变,92 处(64.3%)为 B 型病变,38 处(26.6%)为 C 型病变,血管平均参考直径3.1±0.3 mm。

在进行药物涂层球囊治疗后,住院期间无 1 例发生急性心肌梗死、心原性死亡、靶血管血运重建以及急性冠状动脉内血栓形成。1例因预扩张后严重夹层置入 1 枚支架。

随访12 个月期间,无 1 例发生急性心肌梗死、心原性死亡、靶血管血运重建。

研究者介绍,药物涂层球囊治疗有以下几个优势:可避免影响分支;无聚合物或金属网格,可减少内膜炎症反应,降低晚期血栓形成风险;可缩短抗血小板治疗时间。

药物涂层球囊治疗的最大风险是冠状动脉夹层后出现急性闭塞。因此球囊直径、大小、压力都很重要,也与患者自身血管条件密切相关。

如出现 C型以上夹层需行补救性支架置入术;如为 A 型、B型夹层,可在台上观察 10~15 min,夹层无进展方可结束手术,术后可给予静脉泵入替罗非班预防冠状动脉血栓形成。

研究者指出,预扩张是药物涂层球囊治疗的关键,半顺应球囊扩张时宜采用中等压力,如有残余狭窄,可进一步采用切割球囊或棘突球囊,其直径与血管直径比值为 0.8~1.0,压力一般 8~14 atm,切割球囊要缓慢加压缓慢释放。

预扩张后要进一步评估病变,如残余狭窄小于 30%,TIMI 血流 3 级,无 C 型以上夹层,可开始进行药物涂层球囊治疗。

中国医学科学院阜外医院胡奉环在文章编后语中指出,随着近年来“介入无植入”的理念使得药物涂层球囊适应证扩大,当前研究总结了药物涂层球囊在大血管原发病变的临床应用及良好结果。

但是目前药物涂层球囊治疗冠状动脉原发大血管病变的相关研究较少,主要原因是,单纯经皮冠状动脉成形术后约 3%早期发生血管急性闭塞,一旦发生冠状动脉急性闭塞,可致急性心肌梗死甚至是死亡。

因此,对于冠状动脉大血管药物涂层球囊治疗具有冠状动脉急性闭塞的潜在风险。

胡奉环进一步指出,药物涂层球囊治疗冠状动脉原发大血管病变,要求术者经验丰富,认真选择合适病变,规范药物涂层球囊操作,术后严密观察冠状动脉病变夹层及血流情况 5~10 min。

如出现 C 型及以上夹层或 TIMI 血流< 3级,或者出现术后是否可以发生闭塞不易判断情况时,均应及时置入药物洗脱支架,避免术后发生冠状动脉急性闭塞,导致严重不良心脏事件。

原始出处:

刘蓉,乔树宾,崔锦刚,等. 药物涂层球囊治疗冠状动脉大血管原发病变的有效性和安全性分析. 中国循环杂志, 2022, 37(8): 800-803. DOI: 10.3969/j.issn. 1000-3614.2022.08.007. 

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    2022-08-30 花花1366
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