Aortic pulse wave velocity in individuals of Asian and African ancestry: the HELISUR study

Can postexercise hypotension also be observed in African and Asian populations: a systematic review and meta-analysis of randomized controlled trials

Worldwide, raised blood pressure (BP) or hypertension is the global leading risk factor for the development of cardiovascular diseases and all-cause mortality, with the highest prevalence found in Asian and African origin populations. Post-exercise hypotension (PEH), defined as a sustained reduction in BP after a single bout of exercise is an important physiological phenomenon in BP management. However, little is known about the hypotensive effect of a single bout of exercise in non-Caucasian populations. We systematically summarized the acute effects of a single bout of aerobic exercise on BP in a population of African or Asian origin. We searched the MEDLINE database identifying randomized controlled trials investigating the effect of a single bout of aerobic exercise on BP in African or Asian populations with optimal BP, high normal BP or hypertension published in a peer reviewed journal up to August 2021. A subsequent meta-analysis was performed using random-effect models fitted to estimate effect sizes. We identified 10 aerobic exercise trials performed in individuals of Asian origin (n = 136; mean age: 29.51 (21.2-69) years: 78% male; baseline systolic BP/diastolic BP: 118.9 ± 9.64/68.9 ± 2.69 mmHg) and 11 aerobic exercise trials involving individuals of African origin (n = 157; mean age: 41.05 (29.9-49) years; 59% male; baseline systolic BP/diastolic BP: 134.5 ± 8.65 mmHg/82.2 ± 3.24 mmHg). Non-significant reductions in office systolic BP and diastolic BP at 30 min post exercise (-2.25 [-6.38, 1.88] mmHg, p = 0.28/-1.02 [-2.51, 0.47] mmHg, p = 0.18) and 60 min post exercise (-2.80 [-7.90, 2.28], p = 0.27/-1.95, [-5.66, 1.75], p = 0.3) were observed compared to the control intervention. No statistically significant differences were found between both ethnic groups (p > 0.05). Ambulatory BP was reported only in a few African groups. No effect was found on 24h-systolic BP post exercise, but 24h-diastolic BP was statistically significantly reduced (-1.89 [-3.47, -0.31] mmHg, p < 0.01) after a bout of aerobic exercise compared to the control intervention. The available evidence is insufficient to recommend a single session of aerobic exercise as an efficient tool to lower BP in African and Asian populations. Though, the paucity of data in non-Caucasian populations underscores the need for additional efforts to establish the efficacy of single bouts of exercise, including isometric and dynamic resistance exercise, as a potential non-pharmacological adjunct to help lowering BP in the daily life of descendants of Asian or African origin.

Single nucleotide substitutions in the matrix metalloproteinase 9 gene in hypertensive individuals of European and South Asian ethnicity in the Far Eastern Federal District

Aim. To determine the association of single nucleotide polymorphism (SNP) -1562C>T (rs3918242) in the matrix metalloproteinase 9 (MMP-9) gene in hypertensive (HTN) in individuals of European and South Asian ethnicity of Primorsky Krai and Sakhalin Oblast.

Material and methods. The analysis of conventional and additional risk factors for cardiovascular diseases (35 parameters) in 377 people as a part of regional stage of the Epidemiology of Cardiovascular Diseases and their Risk Factors in Regions of Russian Federation (ESSE-RF) study (2014-2019), of whom 240 people of European (Slavic) and 137 people of South Asian (Korean, second- and third-generation immigrants) ethnicity. Substitutions in the MMP-9 gene -1562C>T (rs3918242) was identified by real-time polymerase chain reaction using TaqMan technology.

Results. Compared to Koreans, the Slavs have a higher blood pressure (p=0,002). There were no significant differences between ethnic groups (p=0,07) in cardiovascular risk levels using the Systematic Coronary Risk Evaluation (SCORE). Significant differences (p=0,003) were determined in cardiovascular risk levels for healthy Koreans and HTN patients. It was shown that among patients with HTN, the pulse wave velocity exceeded the recommended values in 22,2% of Europeans and in 46,6% of Koreans (p=0,003). The number of hypertensive Europeans and minor MMP-9 rs3918242 T allele exceeded 2,6 times the number of healthy persons (odds ratio, 4,7; 95% confidence interval: 1,1 -7,8 (p=0,03)). MMP-9 rs3918242 T allele in Koreans of the Sakhalin Oblast was not associated with HTN (odds ratio, 0,81; 95% confidence interval: 0,12-5,54 (p=0,83)). Moreover, in South Asian population, heterozygous carriers of T allele prevailed, which significantly (p=0,002) differed from Europeans, who, in general, had a homozygous CC genotype.

Conclusion. In Far Eastern Federal District, SNPs in the MMP-9 C-1562T gene were found mainly in hypertensive patients of European ethnicity, while in Koreans, a significant relationship between the carriage of minor T allele in this gene and the presence of HTN was not established.

Heart Failure Hospitalizations and Risk Factors among the Multi-Ethnic Population from a Middle Income Country: The Suriname Heart Failure Studies

INTRODUCTION

Heart failure (HF) is an emerging epidemic with poor disease outcomes and differences in its prevalence, etiology and management between and within world regions. Hypertension (HT) and ischemic heart disease (IHD) are the leading causes of HF. In Suriname, South-America, data on HF burden are lacking. The aim of this Suriname Heart Failure I (SUHF-I) study, is to assess baseline characteristics of HF admitted patients in order to set up the prospective interventional SUHF-II study to longitudinally determine the effectiveness of a comprehensive HF management program in HF patients.

METHODS

A cross-sectional analysis was conducted of Thorax Center Paramaribo (TCP) discharge data from January 2013-December 2015. The analysis included all admissions with primary or secondary discharge of HF ICD-10 codes I50-I50.9 and I11.0 and the following variables: patient demographics (age, sex, and ethnicity), # of readmissions, risk factors (RF) for HF: HT, diabetes mellitus (DM), smoking, and left ventricle (LV) function. T-tests were used to analyze continuous variables and Chi-square test for categorical variables. Differences were considered statistically significant when a p-value <0.05 is obtained.

RESULTS

895 patients (1:1 sex ratio) with either a primary (80%) or secondary HF diagnosis were admitted. Female patients were significantly older (66.2 ± 14.8 years, p < 0.01) at first admission compared to male patients (63.5 ± 13.7 years) and the majority of admissions were of Hindustani and Creole descent. HT, DM and smoking were highly prevalent respectively 62.6%, 38.9 and 17.3%. There were 379 readmissions (29.1%) and 7% of all admissions were readmissions within 30 days and 16% were readmissions for 31-365 day. IHD is more prevalent in patients from Asian descendant (52.2%) compared to African descendant (11.7%). Whereas, HT (39.3%) is more prevalent in African descendants compared to Asian descendants (12.7%). There were no statistically significant differences in age, sex, ethnicity, LV function and RFs between single admitted and readmitted patients.

CONCLUSION

RF prevalence, ethnic differences and readmission rates in Surinamese HF patients are in line with reports from other Caribbean and Latin American countries. These results are the basis for the SUHF-II study which will aid in identifying the country specific and clinical factors for the successful development of a multidisciplinary HF management program.

About 1/3rd of north Indian patients less than 50 years of age with type 2 diabetes have high pulse wave velocity indicating high risk of atherosclerosis

BACKGROUND AND AIMS

Asian Indian patients with type 2 diabetes mellitus (T2DM) have a high cardiovascular risk even at young age. There is a need to assess this increased risk and identify atherosclerosis early so that appropriate measures for risk reduction can be taken. We aimed to study carotid-femoral pulse wave velocity (Cf-PWV), a non-invasive indicator of atherosclerosis, in patients with diabetes below 50 years of age and its correlation with markers of obesity and other cardiovascular risk factors.

METHODS

Patients (n, 299) with T2DM below 50 years of age underwent measurement of Cf-PWV by applanation tonometry. Anthropometric parameters, blood pressure, liver span, glycosylated hemoglobin, serum lipid profile, urinary microalbumin, ankle brachial index and carotid intima media thickness were measured.

RESULTS

Data show that 32.4% of patients had high Cf-PWV, with mean values higher in males than females. On stepwise multiple linear regression analysis, the significant independent determinants of PWV were age, systolic blood pressure, waist circumference, microalbumin and liver span.

CONCLUSION

About one third patients with T2DM less than 50 years of age, in north India have increased arterial stiffness which correlates with blood pressure, abdominal obesity, liver size and microalbumin, indicating increased risk for coronary artery disease.