Wei Janet, Shufelt Chrisandra, Bairey Merz C Noel
Barbra Streisand Women's Heart Center, Cedars-Sinai Smidt Heart Institute, Los Angeles, California, USA.
Curr Opin Cardiol. 2018 Sep;33(5):506-513. doi: 10.1097/HCO.0000000000000544.
When patients are seen for persistent chest pain in the absence of obstructive coronary artery disease, the physician must decide if the symptoms are due to myocardial ischemia in order to guide treatment.
Recent findings indicate that ischemia due to coronary microvascular dysfunction (CMD) is associated with subclinical coronary atherosclerosis and an adverse prognosis. Therapeutic probe trials suggest that antiatherosclerotic and anti-ischemic therapeutic strategies may be useful. A large randomized clinical trial of high-intensity statin, maximally tolerated angiotensin-converting-enzyme inhibitor or angiotensin receptor blocker and low-dose aspirin (WARRIOR NCT#03417388) is in progress.
The diagnosis of CMD should be considered in patients with persistent angina, evidence of myocardial ischemia and normal coronary angiogram. Because of the associated adverse prognosis of CMD , conservative empiric treatment or further diagnostic evaluation of the coronary microvasculature can be performed. Diagnosis involves the measurement of coronary blood blow in response to a vasodilator agent invasively or noninvasively. Treatment of CMD can include the use of traditional antianginal and antiatherosclerotic medications. Clinical trials are needed to assess therapeutic strategies on the outcomes of cardiovascular disease and quality of life, in order to develop evidence-based guidelines.
当患者因持续性胸痛就诊且无阻塞性冠状动脉疾病时,医生必须判断症状是否由心肌缺血引起,以便指导治疗。
最新研究结果表明,冠状动脉微血管功能障碍(CMD)所致的缺血与亚临床冠状动脉粥样硬化及不良预后相关。治疗性探索试验提示抗动脉粥样硬化和抗缺血治疗策略可能有效。一项关于高强度他汀类药物、最大耐受量血管紧张素转换酶抑制剂或血管紧张素受体阻滞剂以及低剂量阿司匹林的大型随机临床试验(WARRIOR NCT#03417388)正在进行。
对于有持续性心绞痛、心肌缺血证据且冠状动脉造影正常的患者,应考虑CMD的诊断。鉴于CMD相关的不良预后,可进行保守的经验性治疗或对冠状动脉微血管进行进一步的诊断评估。诊断包括通过有创或无创方式测量冠状动脉对血管扩张剂的血流反应。CMD的治疗可包括使用传统的抗心绞痛和抗动脉粥样硬化药物。需要进行临床试验以评估治疗策略对心血管疾病结局和生活质量的影响,从而制定基于证据的指南。