Cardiac arrhythmias are characterized by an abnormal heart rhythm, which involves the heart beating at over 100 beats per minute, less than 60 beats per minute, or irregularly. Arrhythmias occur because of the improper functioning of the electrical systems regulating the heartbeat. Arrhythmias are of various types, including atrial fibrillation (or AF), atrial flutter, and atrioventricular nodal re-entrant tachycardia. Symptoms of arrhythmias include tremulous feeling or pain in the chest, shortness of breath, fatigue, dizziness, or fainting.

关键词：心律失常；异常心脏节律；电气系统；心房纤维性颤动

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Passengers have to undergo strict security screening procedures before boarding an aircraft. Passenger screening commonly includes pat-down searches, metal detectors, and full-body scanners. As air passenger traffic has grown, large airports find it difficult to process passengers through security checkpoints without impacting operational efficiency. As a result, advanced passenger screening systems (based on backscatter X-ray and millimeter wave technologies) are being used at airports worldwide, in addition to existing hand-held and walk-through metal detectors.

关键词：乘客；安检程序；搜身；金属探测器；全身扫描仪；航空客运量；乘客筛选系统

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Atherectomy devices are used to remove atherosclerotic plaque to clear blocked blood vessels. Atherosclerotic plaques are deposits of fats, calcium, or other substances inside the blood vessels. Removal of these is an endovascular procedure for the treatment of PAD and CAD. PVD refers to damaged or blocked peripheral blood vessels that supply blood to the arms, legs, and organs other than brain and heart. PAD, which is PVD of the arteries, is known to increase the risk of stroke and heart attack by up to six fold. CAD is a condition in which there is narrowing of the arteries that supply blood to heart muscles. Stents, balloon catheters, and atherectomy devices are used in endovascular procedures to treat PVD. Thrombectomy devices are used to surgically remove thrombi (clots) from blood vessels during the treatment of DVT. A DVT is a blood clot formed in deep veins in the body, mainly in the leg. The risk of developing these vascular diseases increases with age. Diabetes, high blood pressure, obesity, and smoking are other risk factors of these diseases.

关键词：动脉斑块；旋切术装置；消除；粥样硬化斑块；疏通堵塞；血管内手术；PAD；CAD

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There are various categories of commercial vehicles used extensively in Europe. These include LCVs, medium commercial vehicles, and heavy commercial vehicles. LCVs are those vehicles that have a GVWR of less than 3.5 tonnes and are commonly used for government and social organizations, public transportation, and the logistics industry.

关键词：各种类别；商用车；轻型商用车；中型商用车；重型商用车；政府；社会组织；公共交通；物流行业

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In the oil and gas industry, pressure vessels — called separators — are used to segregate well streams into liquid and gaseous components. Separators are used in a range of applications, including on-site primary separation and refinery process separation. The main types of separators are horizontal, vertical, and spherical; these can be further divided into two groups based on the fluids to be separated, namely, oil/gas/water three-phase separators and liquid/gas two-phase separators. Based on application, separators can also be classified as primary-phase separators, test separators, low-pressure separators, high-pressure separators, degassers, or deliquizers. Separators are usually designed in three stages to meet the specific requirements of a project.

关键词：石油；天然气；压力容器；隔离；初级分离；精炼过程分离；水平；垂直；球形

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Sports footwear is a footwear designed for sports or other forms of physical exercise such as training, walking, running, jogging, aerobic dancing, hiking, tennis and other activities. Currently, there is a wide range of sports shoes available in the market, specific for each sport, with several brands, styles, and features. The global sports footwear market can be broadly segmented into various types.

关键词：运动鞋；体育锻炼；品牌；款式；功能

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Continuous basalt fiber is produced by melting basalt rocks at high temperatures and modified according to end-use requirements. Continuous basalt fiber is gaining more popularity than traditional fibers, owing to its chemical, mechanical, and ecological advantages. The basic characteristics of continuous basalt fiber are high durability, high thermal resistance, and compatibility with other materials. Applications of continuous basalt fiber include windmill blades, friction materials, basalt geotextile, car headliners, industrial filets, and fire protection.

关键词：玄武岩纤维；熔化玄武岩；传统纤维；化学；机械；生态优点；高耐用性

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Dermal facial fillers are smooth injectable gels made from either synthetic or naturally derived materials like HA. They are used as an effective treatment for correcting folds, deep lines, and wrinkles in the face.

关键词：面部皮肤填充；真皮填充；医疗美容

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Chronic lymphocytic leukemia is an orphan disease that generally affects the B-cells of the lymphocytes. It is the commonest forms of leukemia and progresses at a slower rate than other forms of leukemia.

关键词：慢性淋巴细胞白血病；白血病治疗法；白血病治疗学

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Chemotherapy-induced nausea and vomiting (CINV) is one of the most common adverse effects of chemotherapy that affects people's quality of life, often leading to the postponement or refusal of potentially curative chemotherapy treatment for cancer.

关键词：CINV；化疗；恶心呕吐；药物

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