In the blind end of the coronary artery.
2 Results According to the above criteria and classification methods, the results of 186 patients were shown in Table 1. Table 1 186 patients with genotype I type la type male and female total from the above results showed that contrast agent adherence type is the most common, followed by It is type I, and again it is type I.
3 Discussion In coronary angiography, the left and right coronary blood flow velocity of the normal coronary artery is about the same, about 1.5 cardiac cycles to empty the contrast agent; the left anterior descending artery contrast agent emptying speed is about 1 75 cardiac cycles. We found that contrast agents were retained for more than 3 cardiac cycles in patients with delayed contrast emptying. The type I of the contrast agent forming a slow blood flow may be associated with coronary microangiopathy, and the coronary microvascular resistance is increased, resulting in retention of the contrast agent in the blood vessel. It is confirmed by animal experiments that the phenomenon of slow blood flow in rabbit abdominal aorta is closely related to endothelial cell injury. Slow blood flow may be a new pathogenesis of ischemic heart disease, which represents both the early stages of atherosclerosis and endothelial dysfunction, and also suggests microvascular dysfunction. Endothelial dysfunction is a triggering factor in atherosclerosis. During the development of atherosclerosis, endothelial dysfunction occurs earlier than coronary angiographic abnormalities and clinical symptoms. Therefore, the detection of endothelial dysfunction is an important early diagnosis index 2~41. The type of contrast agent adherence may be related to the decrease of coronary artery compliance and the decrease of coronary systolic function. The specific mechanism remains unclear. Further clinical and experimental research. The curved portion of the contrast agent retained in the lit type may be related to the hydrodynamic changes in blood flow, but it is difficult to interpret the contrast agent retention in the normal but not curved portion. The im-type and nt-type contrast agents are caused by stenosis and occlusion of the lesion. Among them, the clinical significance of type I, type I and it type needs further study.
At our factory outlet, we offer a wide range of hot-selling graphite moulds for casting. These moulds are manufactured using high-quality graphite materials, ensuring durability and long-lasting performance. Our graphite moulds are designed to withstand high temperatures and provide excellent dimensional accuracy for producing high-quality castings.
Some of our popular graphite moulds for casting include:
1. Graphite Ingot Moulds: These moulds are used for casting metal ingots, such as gold, silver, and other precious metals. They come in various sizes and shapes to accommodate different casting requirements.
2. Graphite Crucibles: Crucibles are essential for melting and pouring molten metal into moulds. Our graphite crucibles are highly resistant to thermal shock and have excellent heat retention properties.
3. Graphite Dies: Dies are used for casting complex shapes and intricate parts. Our graphite dies are precision-machined to ensure accurate and repeatable casting results.
4. Graphite Plates: Plates are used for casting flat or thin metal parts. Our graphite plates are available in various thicknesses and sizes to meet different casting needs.
5. Graphite Rings: Rings are commonly used for casting cylindrical or round-shaped metal parts. Our graphite rings are highly durable and can withstand high temperatures and pressures.
All our graphite moulds are carefully crafted to meet the highest quality standards. They undergo rigorous quality checks to ensure they are free from defects and can provide consistent and reliable casting results.
If you are looking for high-quality graphite moulds for casting, visit our factory outlet to explore our wide range of hot-selling products. Our knowledgeable staff will assist you in finding the right moulds for your specific casting requirements.
Graphite Mould,Graphite Bar,Graphite Plate Sheets,Graphite Ingot Mould
Yixing Xingfeng Carbide Mould Co.,LTD , https://www.xfcmould.com