Association of blood pressure variability with target organ damage in older patients with essential hypertension

Background:Although multiple measures of blood pressure variability(BPV)have been proposed,whether they are better than mean blood pressure in predicting target organs is unclear.We aimed to determine the relationship between short term BPV and target organ injury.Methods:This study was a retrospective study,and 635 inpatients in the Department of Cardiology from 2015 to 2020 were selected.We divided participants into four groups on the basis of the quartiles of BPV.One-way analysis of variance was used to compare the differences between the groups,and linear regression was used to analyze the relationship between BPV and target organ damage.Results:The average age of 635 patients was 74.36±6.50 years old.Among them,354 of 627 patients had diminished renal function(56.5%),221of 604 patients had associated left ventricular hypertrophy(36.6%),and 227 of 231 patients had carotid plaque formation(98.3%).The baseline data indicated significant differences in fasting glucose,total cholesterol,low-density lipoprotein,creatinine,glomerular filtration rate,sex,calcium channel blocker use,and the rate of diminished renal function.Multiple linear regression analysis showed that BPV was negatively correlated with renal injury(creatinine:r=0.306,p<0.01;estimated glomerular filtration rate:r=0.058,p<0.01),and BPV is positively correlated with cardiac injury(r=0.083,p<0.01).Elevated BPV was not found to be associated with vascularinjury.Conclusion:Renal function decreases with increasing BPV and left ventricular mass increases with increasing BPV.

Association factors of target organ damage： analysis of 17 682 elderly hypertensive patients in China

Background Hypertensive target organ damage （TOD） is the main reason for mortality or disability in elderly hypertensive patients. The studies on TOD of hypertension in Asia, especially in Chinese elderly hypertensive patients, are very limited. The aim of this study was to evaluate the prevalence and correlative factors of TOD in older Chinese hypertensive inpatients. Methods This is a retrospective survey and data were collected from the computerized medical files of hypertensive inpatients from January of 1993 to December of 2008. The analysis was done on 17 682 inpatients, aged 60 years or older, with a diagnosis of essential hypertension （EH）. The evidence of hypertensive TOD and associated factors with TOD were collected. Results The prevalence of any hypertensive target organ involvement among these subjects was high. In multivariable Logistic regressions adjusted for potentially confounding factors, older age, male gender, diabetes, EH grade 3, systolic blood pressure （SBP）, and low-density lipoprotein cholesterol （LDL-C）, were independently associated with coronary artery disease. Age, duration of EH, EH grade 3, SBP, pulse pressure （PP）, and homocysteine （Hcy） were independently associated with cerebrovascular disease. Age, diabetes, duration of EH, EH grade 3, SBP, PP and estimated glomerular filtration rate （eGFR） were independently associated with chronic kidney disease. Male gender, EH grade 3 and SBP were independently associated with aortic dissection. Conclusions The prevalence of hypertensive TOD is high in older Chinese hypertensive inpatients. Various cardiovascular risk factors are associated with hypertensive TOD. The level of SBP and severe hypertension （grade 3 hypertension） are common independent risk factors of TOD.

Relationships of Inflammatory Factors and Risk Factors with Different Target Organ Damage in Essential Hypertension Patients

Background： Atherosclerosis （AS） is an inflammatory disease. Inflammation was considered to play a role in the whole process of AS. This study aimed to analyze the relationships of inflammatory factors and risk factors with different target organ damages （TOD） in essential hypertension （EH） patients and to explore its clinical significance. Methods： A total of 294 EH patients were selected and divided into four groups according to their conditions of TOD. Forty-eight healthy subjects were selected as control. The clinical biochemical parameters, serum amyloid A, serum tryptase, and lipoprotein-associated phospholipase A2 （Lp-PLA2） in each group were detected, and the related risk factors were also statistically analyzed. Results： Fihrinogen （Fbg） was the most significant independent risk factor in acute coronary syndrome （ACS） group （odds ratio [OR]： 22.242, 95% confidence interval [CI]： 6.458-76.609, P 〈 0.001） with the largest absolute value of the standardized partial regression coefficient B＇ （b＇： 1.079）. Lp-PLA2 was the most significant independent risk factor in stroke group （OR： 13.699, 95% CI： 5.236-35.837, P 〈 0.001） with b＂ 0.708. Uric acid （UA） was the most significant independent risk factor in renal damage group （OR： 15.307, 95% CI：4.022 58.250, P〈0.001）with b＇= 1.026. Conclusions： Fbg, Lp-PLA2, and UA are the strongest independent risk factors toward the occurrence of ACS, ischemic stroke, and renal damage in EH patients, thus exhibiting the greatest impacts on the occurrence ofACS, ischemic stroke, and renal damage in EH patients, respectively.

Association between the rate of the morning surge in blood pressure and cardiovascular events and stroke

Background The exaggerated surge in morning blood pressure （BP） that many patients experience upon awakening may be closely related to target organ damage and may be a predictor of cardiovascular complications. However, no previous studies have evaluated the rate of this surge independently of the evening period. It remains unclear whether the rate of increase experienced during the surge is a significant or independent determinant of cardiovascular events. Methods We randomly selected 340 ambulatory BP monitoring （ABPM） patients. All subjects without type 2 diabetes mellitus were divided into two groups： hypertensive group （n=170） and normotensive group （n=170）. We analyzed ambulatory blood pressure recordings using a double logistic curve-fitting procedure to determine whether the magnitude of the surge in BP and heart rate （HR） in the morning is related to the level of BP in hypertensive individuals. We evaluated the association between the rate of the morning surge in systolic BP （SBP） and the incidence of myocardial infarction and stroke in normotensive and hypertensive subjects. Results Comparisons between hypertensive and normotensive subjects showed that the rates of the morning surges in SBP, mean BP （MBP）, and diastolic BP （DBP） were greater in the hypertensive group （P 〈0.05） than in the normotensive group. The rate of morning surge in BP was found to be correlated with the daytime SBP （r=0.236, P 〈0.01）, the difference between the day and night plateau （r=0.249, P 〈0.01）, and the night SBP （r---0.160, P 〈0.05）, respectively. After controlling for age, sex, and mean systolic pressure within 24 hours （24 h SBP）, the rate of morning surge in SBP was closely correlated with daytime SBP （r=0.463, P 〈0.001）, night SBP （r=-0.173, P 〈0.05）, and the difference between the day and night plateau （r=0.267, P 〈0.001）. Logistic regression analysis revealed that the rate of morning surge in SBP was an independent determinant of myocardial infarction （OR=1.266, 95% C1=1.153-1.389, P 〈0.001） and stroke （OR=1.367, 95% C/=1.174-1.591, P 〈0.001）. Conclusions The rate of the morning surge in BP is greater in hypertensive subjects than in normotensive subjects. Daytime SBP may be the best predictor of the rate of morning surge in SBP. The rate of the morning surge in BP is associated with cardiovascular and stroke events.