高血壓前期和高血壓人群升主動(dòng)脈彈性功能特征、相關(guān)危險(xiǎn)因素及其對(duì)靶器官損害的預(yù)警價(jià)值研究
[Abstract]:Background: the clinical application and popularity of the evaluation of the elastic function of the ascending aorta for anatomical location has been restricted. Using a retrospective electrocardiogram gated coronary CT imaging can directly evaluate the ascending aorta elasticity without increasing the dosage of contrast media, radiation dose and medical cost. The ascending aorta directly faces the heart, which is the main slow of the heart ejection. The impact of the organs is also an important guarantee for the continuous perfusion of the peripheral organs. The realization of the buffer function is mainly dependent on the normal elasticity of the arteries. The elevation of blood pressure is an important acceleration factor in the hypoplastic artery, but the ascending aorta elasticity and risk factors of the primary hypertension, especially in the prehypertensive population, the ascending aorta elasticity and the target of hypertension. The relationship of organ damage and its early warning value is still not very clear. Objective: To explore the prehypertensive and primary hypertension population in the first part by analyzing the elastic index and clinical data of the ascending aorta of prehypertensive and hypertensive people based on the coronary CT retrospective ECG gated imaging and the people with ideal blood pressure. The morphological and elastic characteristics of the ascending aorta, the correlation with other clinical indicators and their independent risk factors. In the second part, the correlation between the ascending aorta elasticity index and the damage of the heart, the carotid artery, the renal target organ, the sensitive index and the early warning value were discussed and compared with the pulse conduction velocity (PWV). It provides a new method for early prevention, diagnosis, treatment and prognosis of hypertension and target organ damage. Materials and methods: 398 patients (ideal blood) (ideal blood), 398 patients (ideal blood). The study was carried out in 85 people, 121 in prehypertensive group and 192 in primary hypertension group, 209 male and 189 female, with an average age of 23~84 years (53.1 + 11.7) years old. The study subjects were collected the basic data in the first week of the CT examination and performed the laboratory and special examination. The retrospective coronary artery CT imaging examination was performed with two generation double source CT. According to every interval 5%RR interval, the full time automatic off-line reconstruction was achieved, and 5%, 10%, 15%... The internal diameter and sectional area of the 20 phase of the ascending aorta were measured at 20 phases of the ascending aorta (25mm above the left coronary artery). The maximum area and diameter, the minimum area and diameter of the interesting level were determined. Three more common indexes were used to evaluate the elastic properties of the ascending aorta, including the extensibility. AD) arterial compliance (AC) and arterial stiffness (ASI). Results the first part 1. ideal blood pressure, prehypertensive and primary hypertension three groups of ascending aorta morphology and elasticity were compared in the three groups, the minimum ascending aorta diameter (F=3.53, P0.05) and cross-sectional area (F=9.10, P0.001) of the standardized diastolic phase were gradually increased; in the further 22 comparison, high blood pressure The minimum diameter and sectional area of the standardized diastolic period between pre pressure and ideal blood pressure group had no difference, and the standardized section area of prehypertension and hypertension group had significant statistical difference (P0.01), but the minimum diameter had no difference. In the three groups, AD (F=47.46, P0.001) and AC (F=34.51, P0.001) gradually decreased, ASI (F=10.05, P0.001) gradually increased; further 22 comparison was further compared. In all two groups, the differences in AD and AC were very significant (P0.001), while ASI in prehypertensive and ideal blood pressure group had no difference; ASI in primary hypertension group was significantly greater than prehypertensive group (P0.01). The BA PWV in hypertension group was higher than prehypertensive group (P0.05). Age and classification of subjects (whether there was prehypertension or hypertension) were AD hypocritical. Independent predictors of.2. age and ideal blood pressure, the relationship between age and elastic index of ascending aorta in prehypertensive and essential hypertension groups was significantly related to the elastic indexes (AD, AC and ASI), the overall correlation was r=-0.617, -0.539 and 0.643 (P0.001). Except AC, the ideal blood pressure group, the prehypertensive group and the hypertension group AD and ASI and year. The correlation coefficient of age decreased gradually. Except for the AD index of hypertension group (three correlation), the curve fitting showed that the age and AD, AC and ASI index were the best.3. ideal blood pressure in the compound model (Compound). The risk factors of the ascending aorta in prehypertension and primary hypertension group were dependent on the AD as the dependent variable. The results showed that age and smoking were independent influencing factors of the decrease in the AD index of ascending aorta in the ideal blood pressure group; age and systolic pressure were independent influencing factors of prehypertensive group; age, age, 24 hour mean diastolic pressure and pulse pressure were independent influencing factors of the primary hypertension group.4.. The elastic index of different hypertension course and BA PWV compared the course of hypertension for 5 years, 5~10 and 10 years between three groups and any two groups of BA PWV. Three groups AD (P0.001) and AC (P0.001) gradually decrease, ASI (P0.05) gradually increase. Further 22, except AC in 5 year group and 10 year group No difference, AD, AC and ASI were statistically different between the two groups (P0.05). Second part 1. target organ damage in different degrees of ascending aorta morphology, function and BA PWV compared with the increase in the severity of target organ damage (the number of damage, 0,1,2,3), AD (F=40.74, P0.001), AC (F=27.0,), standardized Shu The minimum diameter (F=2.89, P0.05), the minimum area of the standardized diastolic phase (F=4.95, P0.01) and BA PWV (F=5.24, P0.01) had statistical differences. 22 in comparison, the AD, AC and ASI indexes between target organ damage 0 and target organ damage 1 two groups were significantly different (P0.01), target organ damage 1 and target organ damage 2 two groups and elastic indicators There was significant difference (P0.01), but there was no significant difference in ASI. The ASI elasticity index of target organ damage 2 and target organ damage 3 two groups had significant difference (P0.01), but AD and AC had no significant difference. The minimum diameter of standardized diastolic phase, the minimum area in target organ damage and target organ damage 1, target organ damage 1 and target organ damage 2, target organ damage. There was no significant difference between the damage 2 and the target organ damage in 3 groups. The.Ba PWV had significant difference between the target organ damage 0 and the target organ damage (P0.01), while the target organ damage 1 and the target organ damage 2, the target organ damage 2 and the target organ damage 3 groups were independent of the independent risk factors of the target organ damage of the essential hypertension. Whether hypertension was associated with target organ damage as a dependent variable, the multivariate Logistic stepwise regression analysis was carried out with the known risk factors and BA PWV, AD, AC, and ASI as co variables. The risk factors for BA PWV and age, AD, AC, age and ASI were the risk factors for target organ damage, and whether the primary hypertension was associated with the target organ damage as the dependent variable At a statistically significant age, BA PWV, AD, AC, and ASI were used to carry out Logistic stepwise regression analysis, showing that the risk degree of target organ damage in three groups of.3. hypertension (AD three sub), the independent risk factor of AD index as target organ damage, was divided into three groups according to the AD index three points, along with AD quantiles. The target organ damage was also increased significantly (P0.001). The ratio of target organ damage to the target organ (OR) was 7.2 times that of the low fraction. The OR of the target organ damage in the high score group was 9.84 times as high as that in the middle division. The OR of 2 or more target organs in the middle division was 4.15 times that of the low score group. The high score group suffered from 2. The OR of the target organ damage above is 23.33 times as high as that in the middle division. Conclusion part 1. using a retrospective electrocardiogram gated coronary artery CT imaging, with no increase in the dosage of contrast agent, radiation dose, and medical cost, can be used to reflect the multiple dysfunction of the ascending aorta in prehypertension and primary hypertension. The elastic function of.2. in prehypertensive patients is lower than that of the ideal blood pressure population, but it is superior to those of the primary hypertension group, and the ascending aorta is earlier than the morphological change of.3. in all the ascending aorta elasticity indexes. The AD index reflects the sensitivity of the prehypertension and the hypotention of hypertension to be better than that of the AC. ASI, AC and ASI are also of great value, and should be selected rationally. Comprehensive analysis of three elastic indexes can improve the objectivity and accuracy of the evaluation of blood pressure rise to the aortic elastic function damage to a certain extent. The.4. age is still the main decision to affect the ideal blood pressure, prehypertension and the increase of the elasticity of the aorta in the prehypertensive and hypertensive people. Factors, except for age, smoking, systolic pressure level, diastolic pressure and pulse pressure level are independent risk factors that affect ideal blood pressure, prehypertension and hypertension in the ascending aorta. In addition, obesity and blood sugar are also not negligible risk factors. The second part of the 1. liter aortic elasticity is primary high. Subclinical target organ damage in patients with blood pressure is left ventricular hypertrophy, carotid intiptic thickening or independent plaque and proteinuria, independent of traditional BA PWV, ascending aorta morphology and conventional target organ risk factors.2. in all ascending aorta elasticity indexes, AD is the best to reflect target organ damage, and AD index is detected. The early prevention of subclinical target organ damage of hypertension has important clinical value. In addition, AC and ASI are also of great value in reflecting the damage of target organs, and should be selected rationally. The comprehensive analysis of the changes of three elastic indexes is beneficial to more objective, accurate and comprehensive prediction of target organ damage in the AD three division, the high score group is lower. There is a higher risk and severity of target organ damage in the horizontal division, and the target organ damage trend is more obvious with the increase of AD subdivision. In a word, early detection of high blood pressure, especially AD changes and its risk factors in high blood pressure and prehypertensive population, is helpful to identify higher risk individuals and further develop the product. The effective preventive and therapeutic measures have important clinical significance for delaying and controlling hypertension, the damage of target organs of hypertension and the occurrence of cardiovascular and cerebrovascular events.
【學(xué)位授予單位】:大連醫(yī)科大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2016
【分類(lèi)號(hào)】:R544.1;R543
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