基本释义
n. abnormality or impairment in the operation of a specified bodily organ or system 功能障碍
原声例句
Among patients with severe ischemic left ventricular systolic dysfunction who received optimal medical therapy, revascularization by PCI (percutaneous coronary intervention) did not result in a lower incidence of death from any cause or hospitalization for heart failure. (DOI: 10.1056/NEJMoa2206606)
在接受最佳内科治疗的重度缺血性左心室收缩功能不全患者中，通过经皮冠状动脉介入（PCI）实施的血运重建术并未降低全因死亡或心力衰竭住院发生率。
双语例句
The disease causes gastrointestinal dysfunctions.
这种病可造成胃肠功能障碍。
In 2000, Viagra sales accounted for 92% of the global market for prescribed erectile dysfunction pills. (Wikipedia)
2000年，伟哥销售额占了治疗勃起功能障碍处方药全球市场的92%。
Aura symptoms may include visual disturbances (e.g., wavy lines or bright or dark spots), other sensory changes (e.g., numbness or tingling), language dysfunction, and vertigo.
先兆症状可能包括视觉障碍（如波浪线或者亮点或暗点）、其他感觉变化（如麻木或刺痛）、语言功能障碍和眩晕。
Other common migraine symptoms, including aura, cognitive dysfunction, dizziness, and fatigue, may lead physicians to order brain imaging, yet this is generally unnecessary if symptoms have a gradual onset and are transient.
其他常见的偏头痛症状，包括先兆症状、认知功能障碍、头晕和疲劳，可能引导医师安排脑成像检查，但如果症状是逐渐发生并且是一过性的，则脑成像检查通常是不必要的。
prompt diagnosis and good supportive care to maintain hydration, electrolyte balance, and nutrition are crucial, as is the management of the critical complications of cerebral oedema, severe ischaemic colitis, myocardial dysfunction, and diabetes mellitus. (BMJ, 1999, 318(7185): 684-685.)
及时诊断、有效的支持治疗以维持水电解质平衡和营养是至关重要的。同样，对其严重并发症如脑水肿、严重缺血性结肠炎、心肌功能不全和糖尿病的治疗也是至关重要的。
Diabetes is a known risk factor for poor cardiovascular health; studies have suggested people with the condition are almost 50 percent more likely to have a heart attack than those without diabetes. But for men with type 2 diabetes, a new study finds that the erectile dysfunction drug Viagra may lower the risk of heart attack, as well as increase the likelihood of surviving one. (Medical News Today, 21 November 2016)
糖尿病是危及心血管健康的一个已知风险因素；已有研究表明，糖尿病患者心脏病发作的几率比无糖尿病者高出将近50%。但一项新的研究发现，治疗勃起功能障碍的药物万艾可（俗称“伟哥”），可降低2型糖尿病男性患者心脏病发作的风险，也可增加他们心脏病发作后幸存的可能性。
Haematological dysfunction, immunological suppression, and pulmonary disease are just some of the other undesired occasional consequences of cardiopulmonary bypass. These complications, together with the growing trend towards less invasive techniques in other areas of surgery, have encouraged cardiac surgeons to see if minimally invasive cardiac surgery can become a reality and still improve outcomes and costs. (BMJ, 1999, 319(7203): 135-136.)
血液学功能障碍、免疫抑制及肺部疾患是体外循环的另外一些偶见的不良后果。由于这些并发症，加上在外科其他领域使用微创技术的增长趋势，促使心外科医师考虑微创心脏手术是否能够变为现实，并能改善效果和降低费用。
追根溯源
dys- (坏的；不良的；困难的) ➕ function (功能；机能；作用；职能)