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严重冠状动脉疾病包括心肌梗死和缺血性心肌病,缺血性心肌病患者最重要的治疗手段是冠状动脉血运重建,如冠状动脉介入治疗、冠状动脉搭桥手术等。冠状动脉再血管化治疗的风险很高,特别是左室射血分数(left ventricular ejection fraction,LVEF)值<35%的缺血性心肌病(ischemic cardiomyopathy,ICM)患者治疗效果显著不佳[1]。对于严重ICM患者是否应该行再血管化治疗目前尚存在争议[2],但大部分患者治疗后可改善心肌功能、缓解心衰症状、提高生活质量,其前提是具有足够量的可挽救的心肌[3]。而对于心肌细胞已经死亡的缺血心肌,除治疗过程的损伤外,对心肌功能改善毫无意义。因此,无创性检测心肌是否存活是预测患者再血管化治疗疗效的关键[4]。完全不可逆性心肌梗死(如透壁心梗)治疗风险高、疗效差,而慢性心肌缺血无梗死(如冬眠心肌、顿抑心肌)治疗后心肌功能明显改善,疗效显著。因此,对于左心功能障碍及严重冠心病患者术前确定缺血与梗死心肌的范围和程度尤为重要。本文重点介绍18F-FDG PET心肌代谢显像在评估心肌存活中的应用进展。
18F-FDG PET心肌代谢显像在心肌存活诊断中的应用进展
Development of 18F-FDG PET myocardial metabolic imaging in the diagnosis of myocardial survival
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摘要: 严重冠状动脉疾病是左心室功能受损的主要原因,治疗效果不佳。许多冠脉造影显示,冠脉严重狭窄者治疗后心功能并无明显改善,仅部分患者从中受益。因此,有效评估心肌存活状态对冠脉血管重建术的选择和疗效预测有重要价值。核素心肌显像作为一种非侵入性检查,在冠心病诊断、危险度分层、缺血评估、预后判断等方面有重要作用,特别是18F-FDG PET心肌代谢显像,能够准确评估心肌的存活状态及比例,对冠心病的转归及治疗后的效果起着非常重要的作用。
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关键词:
- 冠状动脉疾病 /
- 心肌存活 /
- 正电子发射断层显像术 /
- 氟脱氧葡萄糖F18
Abstract: Severe coronary artery disease is the cause of left ventricular dysfunction, and the treatment for this disease is not effective. Many coronary angiographies showed that severe coronary stenosis did not significantly improve heart function after treatment, except for a few patients. Therefore, effective assessment of the myocardial viability status for the coronary revascularization choice and efficacy has significant predictive value. Nuclide myocardial imaging as a noninvasive examination plays an important role in the diagnosis of coronary heart disease, risk stratification, ischemia assessment, prognosis, and so on. 18F-FDG PET imaging of myocardial metabolism can accurately assess the status and proportion of myocardial viability and possesses an important role in the outcome of coronary heart disease and the effect of treatment. -
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