Factor Of Left Ventricular Hypertrophy Research Articles

Independent risk factors of left ventricular hypertrophy in non-diabetic individuals in Sierra Leone - a cross-sectional study

BackgroundLeft ventricular hypertrophy (LVH) is a critical factor in heart failure and cardiovascular event-related mortality. While the prevalence of LVH in diabetic patients is well-documented, its occurrence and risk factors in non-diabetic populations remain largely unexplored. This study addresses this issue by investigating the independent risk factors of LVH in non-diabetic individuals.MethodsThis cross-sectional study, conducted meticulously, utilized data from a robust and comprehensive source, DATADRYAD, in the Sierra Leone database, collected between October 2019 and October 2021, including LVH and various variables. All variables were described and screened using univariate analysis, Spearman correlation, and principal component analysis (PCA). The lipid profile, including total cholesterols (TC), triglycerides (TG), high-density lipoprotein (HDL-C), non-high-density lipoprotein (Non-HDL-C), and low-density lipoprotein cholesterol (LDL-C), TC/HDL-C ratio, TG/HDL-C ratio, Non-HDL-C /HDL-C ratio and LDL-C/HDL-C ratio, which quartiles were treated as categorical variables, with the lowest quartile serving as the reference category. Three adjusted models were constructed to mitigate the influence of other variables. To ensure the robustness of the model, receiver operating characteristic (ROC) curves were used to calculate the cutoff values by analyzing the ROC curves. A sensitivity analysis was performed to validate the findings further.ResultsThe dataset encompasses information from 2092 individuals. After adjusting for potential factors that could influence the results, we found that TC (OR = 2.773, 95%CI: 1.805–4.26), Non-HDL-C (OR = 2.74, 95%CI: 1.7723–4.236), TC/HDL-C ratio (OR = 2.237, 95%CI: 1.445–3.463), Non-HDL-C/HDL-C ratio (OR = 2.357, 95%CI: 1.548–3.588), TG/HDL-C ratio (OR = 1.513, 95%CI: 1.02–2.245) acts as independent risk factors of LVH. ROC curve analysis revealed the predictive ability of blood lipids for LVH, with Non-HDL-C exhibiting area under the curve (AUC = 0.6109), followed by TC (AUC = 0.6084).ConclusionsTC, non-HDL-C, TC/HDL-C ratio, Non-HDL-C/HDL-C ratio, and TG/HDL-C ratio were independent risk factors of LVH in non-diabetic people. Non-HDL-C and TC were found to be essential indicators for predicting the prevalence of LVH.

Clinical features and risk factors of left ventricular hypertrophy in children with primary hypertension

Objective: To assess the clinical features and relative factors of left ventricular hypertrophy (LVH) in children with primary hypertension. Methods: In this retrospective cohort study, 430 children diagnosed with primary hypertension in Children's Hospital, Capital Institute of Pediatrics from January 2019 to September 2022 were enrolled. Their clinical data was analyzed and LVH was assessed by echocardiography. According to left ventricular geometry, these children were assigned to the LVH group and normal geometry group. General conditions, laboratory indicators and ambulatory blood pressure parameters between two groups were compared by independent sample t-test or Mann-Whitney U test. Spearman correlation coefficient was used to analyze the correlation between LVH and clinical indicators including blood pressure, biochemical and metabolic indicators. The independent risk factors of LVH were analyzed by multivariable logistic regression. The receiver operating characteristic (ROC) curve was used to explore the value of risk factors in the diagnosis of LVH. Results: Among the 430 children with primary hypertension, 342 (79.5%) were males and 88 (20.5%) females. Their age was (12.6±2.3) years, and 123 children (28.6%) of them had LVH. Body mass index (BMI) ((30.0±5.2) vs. (26.2±4.3) kg/m2), ratio of stage 2 hypertension (75.6% (93/123) vs. 59.6% (183/307)), 24-hour systolic blood pressure (24 h SBP)((131±10) vs. (128±10) mmHg,1 mmHg=0.133 kPa), daytime systolic blood pressure (SBP) ((135±11) vs. (131±11) mmHg), nighttime SBP ((128±11) vs. (123±10) mmHg), cholesterol level ((4.0±0.7) vs. (3.9±0.7) mmol/L), serum uric acid level ((447±81) vs. (426±91) μmol/L) and incidence of hyperinsulinemia (69.9% (86/123) vs.59.0% (181/307)) were significantly elevated in the LVH group compared with those in the normal geometry group (all P<0.05). There were more patients with a disease course over 5 years in the LVH group than in the normal geometry group, with a statistically significant difference (χ2=8.90,P=0.031). Spearman correlation analysis showed that BMI, 24 h SBP, daytime SBP, nighttime SBP, triglyceride, uric acid, and serum sodium level were positively correlated with LVMI (r=0.43, 0.20, 0.18, 0.18, 0.18, 0.16, and 0.12, all P<0.05). BMI, hyperinsulinemia, and cholesterol level were positively correlated with relative wall thickness (RWT) (r=0.22, 0.12, and 0.16, all P<0.05). The multivariate logistic regression analysis showed that BMI (OR=1.17, 95%CI 1.10-1.25) and 24 h SBP (OR=1.04, 95%CI 1.01-1.08) were the independent risk factors for LVH (both P<0.05). The area under the receiver operator characteristic curve, combined with BMI and 24 h SBP, was 0.72 (95%CI 0.67-0.77, P<0.05), with a sensitivity and specificity of 71.5% and 64.8%, respectively. Conclusions: BMI and 24 h SBP are the independent risk factors for LVH in children with primary hypertension, and the combination of BMI and 24 h SBP has an acceptable diagnostic value for LVH. Early monitoring of these indexes is necessary to predict preclinical cardiac damage.

Central blood pressure obtained by cuff-based oscillometry as a determinant of left ventricular hypertrophy in hypertensive patients.

Limited and conflicting data have been reported on the prognostic relevance of central blood pressure (CBP) compared with brachial blood pressure (BP) in the anticipation of hypertension-mediated organ damage and the majority of data derived using applanation tonometry with its known complexities. The objective of the present study was to investigate the diagnostic factors of left ventricular hypertrophy (LVH) with a special highlight on the utility of non-invasive oscillometric CBP measurement and derived hemodynamic indices compared to brachial BP as indicators of LVH. This cross-sectional study included 300 hypertensive patients (mean age 55.3 years, 61.3% female, 51.7% obese) with a mean duration of hypertension was 5.8 years. They underwent measurement of brachial BP, using a mercury sphygmomanometer, and CBP, using a Mobil-O-Graph, alongside the determination of left ventricular (LV) mass by two-dimensional transthoracic echocardiography. LVH and LV geometric patterns were defined by LV mass index/height 2.7 and relative wall thickness. Bivariate then multivariate analysis showed that age, BMI, central systolic BP (SBP), and pulse wave velocity (PWV) were significant determinants of LVH and optimally controlled brachial BP was a significant negative determinant for LVH. Central SBP had an acceptable diagnostic performance to determine LVH in patients with hypertension (AUC = 0.722, 95% confidence interval: 0.618-0.824, SE = 0.21, P -value <0.001). Using one-way ANOVA, a comparison of means among age groups showed that the steady increase in central SBP and PWV with aging was greater among LVH patients than non-LVH patients. Estimated central SBP using Mobil-O-Graph showed a significantly higher correlation to LVH than brachial SBP values. The consistent increase in central SBP and PWV with aging was greater among LVH patients than non-LVH patients.

Risk factors of left ventricular hypertrophy in obstructive sleep apnea.

Obstructive sleep apnea (OSA) and left ventricular hypertrophy (LVH) are both related to major cardiovascular diseases. Previous studies have indicated that, compared with non-OSA, OSA is related to LVH with an odds ratio (OR) of 1.70 (95% CI: 1.44-2.00), particularly in patients with coronary artery disease. Meta-analysis has revealed that the severity of OSA is significantly associated with left ventricular mass compared with non-OSA controls. There is, however, limited data on the risk factors of LVH in patients with OSA. The present study aimed to assess the prevalence and clinical factors that are predictive of LVH in patients with OSA. A retrospective analysis of adult patients diagnosed with OSA who had undergone echocardiography was performed. LVH defined by echocardiography indicated an enlarged LV mass index. Clinical factors predictive of LVH were assessed using multivariate logistic regression analyses. An unadjusted OR and an adjusted OR with 95% confidence intervals (CI) were determined. During the study period, 130 patients met the study criteria, with an LVH prevalence of 27.69% (36 patients). The final predictive model of LVH comprised six factors: Age, sex, unrefreshed sleep, body mass index, systolic blood pressure and apnea-hypopnea index. Only age was independently associated with LVH, with an adjusted OR of 1.048 (95% CI: 1.002-1.096). The prevalence rate of LVH in patients with OSA was 27.69%. Older age was independently related to LVH in patients with OSA.

Echocardiographic left ventricular hypertrophy and geometry in Chinese chronic hemodialysis patients: the prevalence and determinants

BackgroundTo investigate the prevalence of left ventricular hypertrophy (LVH) and explore left ventricular geometry in maintenance hemodialysis (MHD) patients, and to explore the risk factors of LVH which is an important predictor of cardiovascular events.MethodsThe subjects were patients who are on MHD for more than 3 months in Peking University People's Hospital from March 2015 to February 2017. Demographic and clinical data were retrospectively collected. Left ventricular mass was measured by echocardiography. LVH is defined by Left ventricular mass index (LVMI) > 115 g/m2 for men and > 95 g/m2 in women. LVMI and relative wall thickness were used to determine left ventricular geometry. Logistic regression was used to analyze the risk factors of LVH.ResultsAltogether, 131 patients including 77 males were enrolled. The median age was 60 (47, 69) years, with a median dialysis vintage of 48 (18, 104) months. There were 80 patients with LVH, the prevalence rate was 61.1%, and 66.3% of them were moderate to severe LVH. We found that (1) most of the patients were concentric hypertrophy; (2) one-third of the patients were concentric remodeling; (3) only 4 cases with normal geometry. The pre-dialysis serum sodium level and time average pre-dialysis systolic blood pressure (SBP) were independent risk factors of LVH.ConclusionLVH is prevalent in MHD patients. Concentric hypertrophy and concentric remodeling are the most common geometric patterns. Attention should be paid to long-term pre-dialysis SBP management and pre-dialysis sodium control as they might be potentially modifiable risk factors for LVH.

Prognostic value of ambulatory blood pressure and clinical use of echocardiography to detect left ventricular hypertrophy in children evaluated for primary hypertension.

Hypertension (HTN) is common in children and often associated with pathologic progression to end organ damage, specifically left ventricular hypertrophy (LVH). The primary goal of this retrospective chart review is to determine if patients with higher blood pressure were more likely to complete echocardiogram (ECHO) and more likely to have LVH, among a pediatric population referred for hypertension evaluation before the 2017 American Academy of Pediatrics (AAP) guidelines. To meet this goal, the number of patients evaluated by ECHO and prevalence of LVH was examined for independent associations with blood pressure and BMI categories by logistic regression. It was found that higher blood pressure was associated with having an ECHO evaluation (p = 0.012). Among patients evaluated by ECHO, one-third had LVH but the presence of LVH was not associated with blood pressure severity or use of anti-hypertensive medication. Instead, BMI was the only factor associated with LVH cardiac remodeling in our population (p = 0.025). Newly updated AAP practice guidelines recommend evaluation of HTN via ABPM, with ECHO performed only at the initiation of pharmaceutical therapy. It is notable that BMI, the only risk factor of LVH found in this study, is not addressed in the current AAP guidelines for ECHO evaluation among hypertensive children. This study suggests that ECHO evaluation may be warranted in a larger subset of children as is recommended by current European Society of Hypertension pediatric guidelines.

SP558Echocardiographic Structural and Functional Abnormalities in Patients With End-Stage Renal Disease Receiving Chronic Hemodialysis : Prevalence and Risk Factors of left ventricular hypertrophy and valvular calcifications

SP558Echocardiographic Structural and Functional Abnormalities in Patients With End-Stage Renal Disease Receiving Chronic Hemodialysis : Prevalence and Risk Factors of left ventricular hypertrophy and valvular calcifications

Profil échocardiographique des patients hypertendus Congolais

ObjectivesTo assess echocardiographic aspect of Congolese hypertensive patients, and to identify predictive factors of left ventricular hypertrophy (LVH). Patients and methodsA transversal study was lead in Brazzaville from January 2011 to December 2013 (36 months). In total, 1125 hypertensive patients under treatment underwent transthoracic echocardiography. The test was carried out either as part of an initial assessment of the hypertension disease or during the development of evocative symptom or complication. Patients’ sociodemographic data and echocardiographic parameters were collected and analyzed. ResultsThere were 621 males (55.2%) and 504 females (44.8%), mean age 54.7±12 years. The main indication of the test were the hypertension initial evaluation in 792 cases (70.4%), dyspnea in 122 cases (10.8%), investigation of ischemic stroke in 101 cases (9%), cardiac failure and chest pain in respectively 58 and 52 cases. 5.3±4.7 years known duration of hypertension status was associated with overweight/obesity in 829 cases (73.7%), physical inactivity in 669 cases (59.5%), hypertension family history in 540 cases (48%), diabetes mellitus in 122 cases (10.8%), dyslipidemia in 82 cases (7.3%), smoking in 29 cases (2.6%). Echocardiographic test was abnormal in 590 cases (52.4%) and showed hypertrophic cardiomyopathy in 510 cases (45.2%), dilated and hypertrophic cardiomyopathy in 46 cases (4.1%), dilated cardiomyopathy with systolic dysfunction in 31 cases (2.8%), coronary artery disease in 4 cases (0.4%). LVH was concentric in 470 cases (84.6%), eccentric in 70 cases (12.6%), and in 16 cases (3%), it was a concentric left ventricular remodeling. The left ventricular's systolic ejection fraction average was 70.5±9.3%, relaxation disorders in 480 cases (42.6%). Age, male gender, income, known duration of hypertension and treatment were predictive factors of LVH. ConclusionsEchocardiographic profile of the Congolese hypertensive is quite various, left ventricular hypertrophy is the most predominant abnormality. Efficient management on the hypertension will lead to reduce its morbidity and mortality.

Left Ventricular Hypertrophy and Predictive Factors among Congolese Hypertensive Patients

A cross-sectional study of hypertensive patients was carried out in Brazzaville between January 2011 and December 2013. The objectives of the present study are to determine the different types of left ventricular hypertrophy (LVH) and to identify the predictive factors of LVH. It included 556 hypertensive patients with LVH, characterized by left ventricular mass index (LVMI) > 135 g/m2 in men, and > 111 g/m2 in women. Patients’ sociodemographic data and echocardiographic parameters were gathered and analyzed. There were 342 males (61.5%) and 214 females (38.5%), with mean age 53.5 ± 11.5 years. The indications of the test were hypertension initial evaluation in 402 cases (72.3%), investigation of ischemic stroke in 62 cases (11.2%), heart failure in 58 cases (10.4%), dyspnea and chest pain in respectively 22 and 12 cases. Hypertension, old of 5.2 ± 4.5 years, was associated with overweight/obesity in 408 cases (73.4%), physical inactivity in 325 cases (58.5%), hypertension family history in 274 cases (49.3%), diabetes mellitus in 76 cases (13.7%), dyslipidemia in 63 cases (11.3%), tobacco use in 9 cases (1.6%). The prevalence of LVH was 49.4% and consisted into concentric LVH in 470 cases (84.5%), eccentric LVH in 70 cases (12.6%), and in 16 cases (2.9%), it was a concentric left ventricular remodeling. Age, male gender, seniority of hypertension and treatment were predictive factors of LVH. The latter is the most predominant abnormality in the echocardiographic profile of Congolese hypertensive patients. Efficient management on hypertension will lead to reducing its morbidity and mortality.

Independent influences of excessive body weight and elevated blood pressure from childhood on left ventricular geometric remodeling in adulthood

BackgroundObesity and hypertension are two risk factors of left ventricular hypertrophy (LVH) in adults. We aimed to examine the impacts of body weight and blood pressure (BP) from childhood on adult LV geometric remodeling. MethodsThe study cohort consisted of 1256 adults aged 27–42years who had 2–10 measurements of body mass index (BMI) and BP from childhood in 1987 to adulthood in 2010. We calculated the cumulative and incremental values of BMI and BP from childhood to adulthood. In adulthood, four LV geometric patterns were defined based on the values of left ventricular mass index (g/m2.7) and relative wall thickness: normal geometry, concentric remodeling (CR), eccentric hypertrophy (EH) and concentric hypertrophy (CH). ResultsThe prevalence of abnormal LV geometric patterns in adults was 26.4% for CR, 2.0% for EH and 2.5% for CH. For childhood values, systolic BP (Odds Ratio [OR]=1.26, 95% confidence interval [CI]=1.08–1.47) but not BMI (OR=1.06, 95%CI=0.93-1.18) was associated with adult CR, whereas BMI (OR=3.53, 95%CI=2.09–5.98) but not systolic BP (OR=1.04, 95%CI=0.65–1.66) was associated with adult EH. Both childhood BMI (OR=2.69, 95%CI=1.77–4.09) and systolic BP (OR=1.64, 95%CI=1.07–2.51) were independently associated with adult CH. For adulthood, cumulative and incremental values, BMI and systolic BP were independently associated with adult CR, EH and CH. ConclusionExcessive body weight and elevated BP from childhood have independent influences on the development of adult LV geometric remodeling.

The Correlation between Morning Blood Pressure Surge, Homocysteine and Left Ventricular Hypertrophy in Elderly Patients with Primary Hypertension

Objective: To investigate the correlation between morning blood pressure surge, homocysteine (Hcy) and left ventricular hypertrophy (LVH) in elderly patients with primary hypertension. Method: 215 cases of patients with hypertension from January 2015 to June 2016 were randomly selected from TianYou Hospital attached to WUST.Blood pressure was monitored 24 hours; according to the results, patients were divided into 81 cases of morning blood pressure surge group (study group) and 134 cases of non-morning blood pressure surge group (control group). Biochemical indicators of the two groups were measured, such as Hcy, Glu, blood lipid (TC, TG, LDL-C, HDL-C). The ventricular structure index (IVST, LVDD, LVPWT, LVMI) were measured by color doppler ultrasound.Result: 1) The IVST, LVDD, LVPWT and LVMI were significantly higher in study group than in control group (P 0.05), and the incidence of left ventricular hypertrophy (LVH) (74.1%) was significantly higher in study group than in control group (22.4%) (P 0.05). 2) There was no statistical difference in TC, TG, LDL-C and HDL-C between the two groups (P > 0.05). The serum levels of Hcy [(16.89 ± 5.84) mmol/L] in study group were significantly higher than those in control group [(10.88 ± 4.07) mmol/L] (P 0.05). 3) Multivariate logistic regression analysis showed that morning blood pressure surge and Hcy were the risk factors of left ventricular hypertrophy. Conclusion: In elderly patients with hypertension, the higher the morning blood pressure surge and Hcy level, the more probability of left ventricular hypertrophy and the more obvious degree.

Inflammation regulates fibroblast growth factor 23 production.

Fibroblast growth factor 23 (FGF23) is a hormone secreted by osteocytes and osteoblasts that regulates phosphorus and vitamin D homeostasis. FGF23 levels increase progressively in chronic kidney disease (CKD), and FGF23 excess might be a causal factor of left ventricular hypertrophy, CKD progression and death. Therefore, understanding the molecular mechanisms that control FGF23 production is critical to design therapies to lower FGF23 levels. The present review focuses on the role of inflammatory stimuli on FGF23 regulation and summarizes recent studies that support a novel framework linking inflammation to FGF23 regulation. Inflammation and iron deficiency, which are common occurrences in CKD, have emerged as novel FGF23 regulators. Recent findings show that inflammation increases FGF23 production in bone through direct and iron-related indirect mechanisms. In these settings, hypoxia-inducible factor (HIF)-1α orchestrates FGF23 transcription in response to inflammation and is primarily responsible for coordinating FGF23 production and cleavage. We demonstrate that inflammation increases FGF23 production and may contribute to elevated FGF23 levels in CKD. Osseous HIF-1α may represent a therapeutic target to lower FGF23 levels in CKD patients and minimize the negative consequences associated with FGF23 excess.

0248: Echocardiographic profile of the Congolese hypertensive patients

to assess echocardiographic aspect of Congolese hypertensive patients, and to identify predictive factors of left ventricular hypertrophy (LVH). A transversal study was lead in Brazzaville from January 2011 to December 2013 (36 months). 1125 hypertensive patients under treatment underwent transthoracic echocardiography. The test was carried out either as part of an initial assessment of the hypertension disease or during the development of evocative symptom or complication. Patients’ sociodemographic data and echocardiographic parameters were collected and analyzed. There were 621 males (55.2%) and 504 females (44.8%), mean age 54.7±12 years. The main indication of the test were the hypertension initial evaluation in 792 cases (70.4%), dyspnea in 122 cases (10.8%), investigation of ischemic stroke in 101 cases (9%), cardiac failure and chest pain in respectively 58 and 52 cases. The mean duration of hypertension status was 5.3±4.7 years. Echocardiographic test was abnormal in 590 cases (52.4%) and showed hypertrophic cardiomyopathy in 510 cases (45.2%), dilated and hypertrophic cardiomyopathy in 46 cases (4.1%), dilated cardiomyopathy with systolic dys-function in 31 cases (2.8%), coronary artery disease in 4 cases (0.4%). LVH was concentric in 470 cases (84.6%), eccentric in 70 cases (12.6%), and in 16 cases (3%), it was a concentric left ventricular remodeling. The left ventricular’s systolic ejection fraction average was 70.5±9.3%, relaxation disorders in 480 cases (42.6%). Age, male gender, income, known duration of hypertension and treatment were predictive factors of LVH. Conclusions echocardiographic profile of the Congolese hypertensive is quite various, left ventricular hypertrophy is the most predominant abnormality. Efficient management on the hypertension will lead to reduce its morbidity and mortality.

The effects of strict salt control on blood pressure and cardiac condition in end-stage renal disease: prospective-study

Introduction: Overhydration is the main contributory factor of left ventricular hypertrophy and closely associated with cardiovascular events in end stage renal disease (ESRD) patients. The aim of this prospective-study was to investigate the impact of strict salt and volume control on hypertension and cardiac condition in ESRD patients. Methods: A total of 12 peritoneal dialysis (PD) and 15 prevalent hemodialysis (HD) patients were enrolled. All patients either PD or HD were allocated to intervention of strict salt restriction according to basal hydration state of empty abdomen in PD and midweek predialysis HD which were estimated by body composition monitor (BCM) and echocardiography. Results: Mean ages were 48.3 ± 16.7 years for PD, and 48.8 ± 18 for HD patients. Extracellular water/height was 10.04 ± 2.70 and 10.39 ± 1.53 L/m in PD and HD groups. Systolic blood pressures decreased in PD and HD from 133.1 ± 28 and 147.3 ± 28.5 to 114.8 ± 16.5 and 119.3 ± 12.1 mmHg, respectively, (p < 0.00). IDKA/DW were decreased from 3.26 ± 1.6 to 2.97 ± 1.63 % in HD group (p > 0.05). LVMI and LAI were not increased in both groups. Conclusion: Strict salt and volume control in ESRD patients after assessment of hydration status with either using BCM or echocardiography provides better management of volume control leading to more precise cardiovascular protection.

Hypertension, fluid overload and micro inflammation are associated with left ventricular hypertrophy in maintenance hemodialysis patients

This cross-sectional study aims to identify the potential risk factors of left ventricular hypertrophy (LVH) in hemodialysis (HD) patients. Echocardiography, anthropometric measurements and biochemical analyses were performed for 112 HD patients. In univariate analysis, body mass index, systolic blood pressure, diastolic blood pressure, glycosylated hemoglobin, glycated albumin, high sensitivity C-reactive protein (hs-CRP), cardiac troponin T (cTnT), amino-terminal pro-B-natriuretic peptide (NT-proBNP) and carotid artery intima-media thickness were positively correlated with left ventricular mass index (LVMI); pre-albumin, serum creatinine, left ventricular ejection fraction (LVEF) and fractional shortening were negatively correlated with LVMI. Linear regression analysis showed systolic blood pressure, NT-proBNP and LVEF were independently associated with LVMI. According to a binary logistic regression model, higher systolic blood pressure, NT-proBNP and hs-CRP levels showed independent correlation with LVH. Receiver operator characteristic curves analysis showed the associations between NT-proBNP and LVH more closely than hs-CRP and cTnT. The area under the curve for NT-proBNP, hs-CRP and cTnT was 0.762 (95% CI: 0.660–0.864, p < 0.001), 0.734 (95% CI: 0.624–0.844, p < 0.001) and 0.677 (95% CI: 0.563–0.790, p = 0.004), respectively. These data support the main conclusions: hypertension, fluid overload and micro inflammation are associated with LVH in maintenance HD patients. It demonstrates traditional and nontraditional risk factors all play important roles in the development of LVH.

ASSA13-14-23 Relationship of Renal Function and Left Ventricular Hypertrophy in Refractor Hypertension

Objective To study the relationship between renal function and left ventricular hypertrophy (LVH) in patients with refractory hypertension (RH), and to investigate the relative risk factors of LVH in RH patients. Methods 215 (120 cases of RH and 95 cases of none RH) hospitalised patients were retrospectively analysed. The renal function was evaluated by modification of diet in renal disease (MDRD) formula, and 24h ambulatory blood pressure was monitored. Echocardiography measurement was performed, and left ventricular mass index (LVMI) were calculatled. LVH were definited when LVMI > 125g/m2 in male or LVMI > 110g/m 2 in female. Results Compared with that in none RH group, estimated glomerular filtration rate (eGFR) in RH group was lower[(72.3 ± 22.1) vs (83.1 ± 19.5)ml/(min.1.73 m 2), P 2 ), LVH, secondary hypertension, and LVMI in RH group were higher[29.2%vs10.5%, 32.5%vs 16.8%, 31.7%vs5.3%,(108.0 ± 27.1)vs (95.3 ± 22.9) g/m2, respectively]. These differences had statistic significance (all P 2 ) and concomitant hypercholesteremia were 4.5(95%CI 1.82–1.07, P = 0.001) and 3.6(95%CI 1.36–9.58, P = 0.010), respectively. Conclusions Renal function and LVH are evident in RH patients. Different levels of renal function had different impacts on LVH. eGFR 2 ) is a relative risk factors of LVH.

Relationship between Nocturnal Blood Pressure and Left Ventricular Hypertrophy in Hypertensive Patients

Objective: Left ventricular hypertrophy (LVH) is the most common target organ damage in hypertension. However, the association of LVH and circadian rhythm of blood pressure (BP) is unknown. The objective of the present study was to explore the relationship between circadian rhythm of BP and LVH using ambulatory blood pressure monitoring (ABPM). Study design: A total of 325 untreated hypertensive patients were recruited. The patients were divided into two groups: hypertensive patients with LVH (n=121) and without LVH (n=204). Twenty-four-hour ABPM was performed in all the patients to collect the following parameters: 24-hour average systolic and diastolic pressure, daytime average systolic and diastolic pressure, nocturnal average systolic and diastolic pressure, and night to day BP ratio. The relationship between LVH and the various ABPM parameters was analyzed. Results: We found that the average nocturnal systolic blood pressure (SBP) in hypertensive patients with LVH was higher than that in hypertensive patients without LVH (145 ± 16.1 mmHg versus 136 ± 12.7 mmHg, P<0.05). The average night to day SBP ratio in hypertensive patients with LVH was also higher than that in hypertensive patients without LVH (0.93 ± 0.04 versus 0.86 ± 0.04, P<0.05). Multiple regression analysis indicate that the average nocturnal SBP and the night to day SBP ratio were associated with LVH (Odds ratio (OR) 1.67, 95% CI: 1.31-3.21; OR: 1.88, 95% CI: 1.56-3.78) by adjustment for traditional covariates. Conclusion: The average nocturnal SBP and the average night-day SBP ratio are independent risk factors of LVH in patients with hypertension.

Arterial Stiffness Is the Independent Factor of Left Ventricular Hypertrophy Determined by Electrocardiogram

IntroductionArterial stiffness may contribute to left ventricular hypertrophy (LVH). This study was conducted to evaluate the independent factor of LVH and the quantification of LVH by electrocardiogram (ECG) to predict the degree of aortic stiffness using brachial-ankle pulse wave velocity (baPWV) in subjects with hypertension. Materials and MethodsA total of 984 consecutive patients who were diagnosed as having essential hypertension were entered into the study. baPWV determination, ECG and blood sampling were performed after a 12-hour overnight fast. LVH was diagnosed using electrocardiography; Romhilt-Estes point score was subsequently calculated. Participants were separated into LVH and non-LVH groups. Additional factors associated with LVH were examined using multivariate analyses. ResultsThe non-LVH groups were younger (P= 0.001), had less men (P=0.001), lower systolic and diastolic blood pressure and pulse pressure (P < 0.001 for each) and lower baPWV (P < 0.001). Stepwise multiple logistic regression analysis demonstrated that sex, age, systolic blood pressure and baPWV are independent factors. Using a baPWV value of 1825cm/sec, the area under the receiver operating characteristic curve was 0.644 and the highest discriminating sensitivity and specificity were 60% and 65%, respectively. ConclusionAortic stiffness may be related to electrocardiographically determined LVH in patients with hypertension. Thus, stiffening of large arteries, together with increased systolic blood pressure, seems to significantly contribute to the pathogenesis of LVH. Quantification of LVH by ECG can also predict the degree of aortic stiffness.

Risk Factors Affecting Cardiac Left Ventricular Systolic and Diastolic Function and Hypertrophy in the Chronic Phase Post-Allogeneic Hematopietic Cell Transplantation

Abstract 2000The long-term survival rate after allogeneic hematopoietic cell transplantation (HCT) has been significantly improved over recent decades due to improvements in the HCT procedure. However, chronic complications such as cardiovascular disease have become increasingly evident and constitute a serious problem among long-term survivors after HCT.It is well-known that high-dose cyclophosphamide (CY) used for conditioning is one of the major causes of acute cardiotoxicity after HCT; however, it is still unclear which factors contribute to chronic cardiotoxicity. Although there is a possibility that chronic GVHD (cGVHD) causes cardiac tissue damage via cytokines such as IL-2, or TNF-alpha, it is unclear whether or not cGVHD influences cardiac function.In the present retrospective cohort study, we investigated which factors affected cardiac function and left ventricular hypertrophy (LVH) in the chronic phase after HCT. We examined left ventricular systolic and diastolic functions and LVH in patients who received HCT between April 2000 and March 2011 and survived for more than one year post-HCT. Only the patients who had undergone an echocardiographic examination before HCT were eligible for the study. We assessed left ventricular ejection fraction (LVEF) as a surrogate marker of LV systolic function and the early peak flow velocity/atrial peak flow velocity (E/A) as a surrogate marker of LV diastolic function using echocardiography. LVH after HCT was identified when the interventricular septal wall (IVS) and/or the posterior wall (PW) became more than 12 mm thick after HCT. We examined the factors that could have had some influence on cardiac function after HCT including age, sex, cumulative dose of anthracycline, use of high-dose CY in the conditioning, total body irradiation (TBI), intensity of conditioning regimen (myeloablative vs. reduced intensity conditioning), a history of hypertension, hemoglobin and serum ferritin levels.A total of 58 patients (25 males and 33 females) were eligible for participation in the study. The median age of enrolled patients was 46 years (range: 21–73). The median cumulative dose of anthracycline was 90 mg/m2 (0–431mg/m2). Forty-nine patients received myeloablative conditioning and 20 of these patients received myeloabative conditioning with TBI 12 Gy. Twenty-four patients were treated for cGVHD and 7 had a history of hypertension and 2 had an LVEF of less than 55% before HCT. Six had an LVEF of less than 55% at more than 1 year after HCT. In the multiple regression analysis that assessed the relationship between LVEF or E/A and the factors, myeloablative conditioning with TBI 12Gy was significantly associated with a decrease in LVEF after HCT (coefficient= −7.57, P=.001). However, in a comparison of Ara-C/CY/TBI and CY/TBI conditioning, the degree of change in the LVEF before and after HCT was similar between the two groups (repeated measures of ANOVA analysis. P=.0972). Patients who had received myeloablative conditioning had a significant decrease in E/A after HCT(coefficient= -.31, P=.02). Furthermore, a history of hypertension was also slightly associated with a decrease in E/A after HCT(coefficient= -.30, P=.05). In addition, only age was identified as a significant risk factor of left ventricular hypertrophy after HCT in the multivariate logistic analysis. However, in the present study, we could not identify a significant impact of cGVHD on cardiac function and LVH post HCT.We concluded, based on our results, that the presence of cGVHD did not significantly contribute to a decrease in cardiac function in the chronic phase after HCT. Our results also suggest that the intensity of conditioning for HCT had a significant effect on chronic cardiac function after HCT. Disclosures:No relevant conflicts of interest to declare.

Q-003 EFFECTS OF METABOLIC SYNDROME ON LEFT VENTRICULAR HYPERTROPHY IN CHINESE POPULATION

Background Metabolic syndrome(MS) have a role in the progress of left ventricular. We evaluate the influence factors of left ventricular hypertrophy of MS in Chinese population. Methods Cochrane Library, PubMed, EMBASE, Chinese Biomedical Literature Database, Chinese Scientific Journals Full-text Database, and Chinese Journal Full-text Database up to April 2011 were used to identify controlled trial in China that directly compared left ventricular hypertrophy in the MS combining with hypertension and hypertension only. The items of investigation included body mass index(BMI), systolic blood pressure(SBP), diastolic blood pressure(DBP), fasting plasma glucose(FPG), high density lipoprotein cholesterol(HDL-c), low density lipoprotein cholesterol(LDL-c), total cholesterol(TC), triglyceride(TG), left ventricular posterior wall thickness(LVPWT), left ventricular end-diastolic diameter(LVEDd), left ventricular mass(LVM), left ventricular mass index(LVMi) and interventricular septum thickness(IVSt). Data was extracted and analyzed by Cochrane Collaboration's RevMan 5.0 software. Results Eight trials involving 2979 patients were included. The results showed that there was no significant difference in DBP and SBP within 2 groups. The patients of MS with hypertension presented higher BMI (95% CI: 2.38 ∼ 5.93), FPG (95% CI: 0.53 ∼ 1.08), LDL-c (95% CI: 0.06 ∼ 0.75), TC (95% CI: 0.22 ∼ 0.89), TG (95% CI: 0.90 ∼ 1.43), LVPWT (95% CI: 0.31 ∼ 0.64), LVEDd (95% CI: 0.49 ∼ 2.03), LVM (95% CI: 9.29 ∼ 16.61), LVMi (95% CI: 4.55 ∼ 13.37), IVSt (95% CI: 0.27 ∼ 0.51), and lower HDL-c (mean difference = −0.35,95% CI: −0.57 ∼ −0.13) compared with those patients of hypertension only(P < 0.05). Conclusion The MS with hypertension have more factors to promote left ventricular hypertrophy in Chinese population. Due to the limitation of sample sight, the quality of original studies and the publication bias, this issue need to be confirmed by large multicenter randomized controlled trials.