Prevalence of Hypertensive Emergency and Associated Factors Among Hospitalized Patients with Hypertensive Crisis: A Retrospective Cross-Sectional Study

Hypertensive crisis and its predictors in Africa: Systematic review and meta-analysis, 2024

Introduction

Hypertensive crises are a leading cause of visits to emergency departments, carrying grave health implications. A significant number of patients presenting with these crises have a known history of hypertension.

Objective

The aim of this systematic review and meta-analysis is to examine the combined prevalence of hypertensive crises among individuals with either a history of hypertension or unknown status (newly diagnosed with a hypertensive crisis).

Methods

This review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and was registered with the Prospective Register of Systematic Reviews (PROSPERO). Research databases, including PubMed, Embase, Scopus, Africa Index Medicus, Science Direct, HINARI, and Google Scholar, were systematically searched. Study quality was evaluated using the Newcastle-Ottawa Scale, while publication bias was explored through Egger's regression test, funnel plots, and sensitivity analyses. Data collection adhered to the Joanna Briggs Institute (JBI) format. Meta-analysis was performed using STATA version 17, employing the random-effects DerSimonian-Laird model.

Results

Amongst the 15 studies analyzed, the application of the random-effects DerSimonian-Laird statistical model indicated that the prevalence of hypertensive crisis was determined to be 9.09 %, with a 95 % confidence interval (CI) ranging from 7.41 % to 10.77 %. Factors such as poor medication adherence (POR 5.00; 95 % CI: 3.61, 6.93), patients with comorbidities (POR 4.73; 95 % CI: 3.29, 6.80), patients with a history of hypertension (POR 5.64; 95 % CI: 4.57, 6.94), patients aged >65 (POR 2.77; 95 % CI: 2.16, 6.59), and excessive alcohol intake (POR 5.01; 95 % CI: 3.82, 6.58) were associated with higher odds of hypertensive crisis.

Conclusion

The findings indicate a markedly higher incidence of hypertensive crisis among hospital-presenting patients in Africa. Factors such as medication non-adherence, co-existing comorbidities, historical hypertension, being over 65, and alcohol misuse significantly contribute to this condition. These insights call for a comprehensive healthcare strategy that targets both the management of hypertension and its complications, aiming to improve the overall health outcomes of affected patients.

An Assessment of the Prevalence and Risk Factors of Hypertensive Crisis in Patients Who Visited the Emergency Outpatient Department (EOPD) at Adama Hospital Medical College, Adama, Oromia, Ethiopia: A 6-Month Prospective Study

Background

Over 1 billion people worldwide suffer from the common chronic medical condition of hypertension. A hypertensive crisis occurs when blood pressure exceeds 180/110 mmHg. Depending on whether the target organ is harmed, the situation may be presented as a hypertensive emergency or urgency.

Objective

To assess the prevalence and risk factors of patients with hypertensive crises who visited the Emergency Outpatient Department (EOPD) at Adama Hospital Medical College in Adama, Oromia, Ethiopia, between January 01 and August 31, 2021, G.C. Methodology. A cross-sectional, prospective study on the hypertensive crisis was conducted at Adama Hospital Medical College from January 01 to August 31, 2021, G.C. The data were collected using a standardized questionnaire, validated for completeness, and analyzed using SPSS. The findings were tabulated, and conclusions and recommendations were conveyed.

Result

Out of 9,082 patients who visited the EOPD during the six-month period, 444 individuals with hypertensive crises were identified, representing a prevalence of 4.9%. Of these, 56.8% were men, resulting in a M : F ratio of 1.31 : 1. Those between the ages of 66 and 75 were the most affected. At presentation, 91.0% of the study participants were known hypertensive patients. Among the known hypertensive patients, the majority (34.9%) were known to have been hypertensive for 5-10 years. Of the known hypertensive patients, 48.6% were found to be adherent. Hypertensive urgency was discovered to be far more common than hypertensive emergencies (63.5% vs. 36.5%). Headache was the most common presenting symptom, and most patients (36.5%) presented to the health setup in less than 24 hours. The main risk variables identified were drug discontinuation, family history of hypertension, salt consumption, and alcohol usage. The main excuse for the lack of adherence was the cost of the medications. More than half of the patients do not have any additional comorbidities, and of those who do, diabetes mellitus is the most prevalent. A stroke was identified as a major complication. Conclusions and Recommendations. Hypertensive crises are one of the most prevalent reasons for EOPD admission and are linked to significant consequences. At presentation, most of the study subjects were known hypertension patients. Diabetes mellitus was discovered to be a comorbid condition in one-quarter of them. Although more than half of the patients had improved, the death rate still remained high. Infrastructure and capacity building to provide hospitals with the requisite baseline investigations are among the government's recommendations. Health practitioners are expected to make improvements, such as by educating the public about the need for lifestyle changes and evaluating and managing any hypertension problems.

Determinants of hypertensive crisis among hypertensive patients at adult emergency departments of public hospitals in Addis Ababa, Ethiopia, 2021: a case-control study

BACKGROUND

Hypertension (HTN) is a major global health problem that affects approximately 1.13 billion people worldwide, and 1-2% of this population has hypertensive crisis. Hypertensive crisis is becoming a major health issue in low-income countries. However, few studies have been conducted in developing countries such as Ethiopia. This study aimed to assess the determinants of hypertensive crisis among patients visiting adult emergency departments of public hospitals in Addis Ababa.

METHOD

A hospital-based unmatched case-control study was conducted among 85 cases with a hypertensive crisis and 170 controls with hypertension without a hypertensive crisis in the adult emergency departments of public hospitals in Addis Ababa from March 15 to May 15, 2021. Data were collected using a structured questionnaire and analyzed using SPSS version 26. Binary logistic regression and multivariable logistic regression were performed. Finally, a statistically significant level was declared at a p value of less than 0.05. The result was summarized and presented in text, tables, and graph.

RESULT

The odds of having hypertensive crisis were 3.6 times (AOR = 3.621) higher among participants with a history of hypertension compared to those without a history of hypertension. There was also 4 times increased risk of hypertensive crisis among participants who presented with diabetes mellitus than participants who presented without it (AOR = 4.179). Similarly, participants who presented with stroke had 7 times higher odds of having hypertensive crisis (AOR = 7.174) than participants without stroke.

CONCLUSION

This study demonstrated a statistically significant association between unemployment, diabetes mellitus, stroke, heart failure, history of hypertension, family history of hypertension, and regular follow-up with a hypertensive crisis. The Ethiopian Ministry of Health, Ababa City Administration Health Bureau, and hospitals shall give due attention to the HTN crisis. Health care workers, hospital managers, and other stakeholders shall work towards the early detection and management of HTN-crisis to prevent related morbidity, disability, and mortality.

In-hospital mortality and length of stay of patients with hypertensive crisis treated at public hospitals in Harari Regional State, Eastern Ethiopia

Hypertensive crisis poses substantial cardiovascular morbidity and mortality. This study aimed to assess in-hospital mortality, length of stay (LOS), and their predictors among patients with hypertensive crisis treated at public hospitals in Harari Regional State, Eastern Ethiopia. An institutional-based retrospective cohort study was conducted from October 1 to 31, 2022. The medical records of 328 patients with hypertensive crisis treated at two public hospitals between September 1, 2017 and August 31, 2022 were reviewed. Cox proportional hazards regression and negative binomial regression were used to identify predictors of in-hospital mortality and LOS, respectively. The in-hospital mortality rate of patients with hypertensive crisis was 18.94 (95% confidence interval (CI): 12.08-29.70) per 1000 person-day observation. The median (interquartile range) LOS of these patients was 10 (4-120) hours. Age ≥65 years (adjusted hazard ratio (AHR): 3.30; 95% CI: 1.17- 9.33); increment in initial systolic blood pressure (AHR: 1.040; 95% CI: 1.014-1.066); and having acute brain-related damage (AHR: 4.02; 95% CI: 1.48-10.88) were predictors of in-hospital mortality. Rural residence (adjusted incident-rate ratio (IRR): 1.34; 95% CI: 1.03-1.75); having a history of medication discontinuation (adjusted IRR: 1.59; 95% CI: 1.16-2.18); comorbidity (adjusted IRR: 1.90; 95% CI: 1.49-2.43); acute brain-related damage (adjusted IRR: 13.32; 95% CI: 9.22-19.24), acute cardiac-related damage (adjusted IRR: 7.40; 95% CI: 4.90-11.16); and acute kidney injury (adjusted IRR: 7.64; 95% CI: 5.46-10.69) were predictors of LOS. Thus, it is necessary to develop strategies that allow early screening and follow-up of patients at risk.

Characteristics and factors associated with hypertensive crisis: a cross-sectional study in patients with hypertension receiving care in a tertiary hospital

Background

The hypertensive crisis is characterized by poorly controlled hypertension, which can lead to unfavorable outcomes and high utilization. The purpose of this study was to examine the prevalence, clinical characteristics, and factors associated with hypertensive emergency.

Material and Methods

This cross-sectional study collected data from the hospital information system that included patients greater than or equal to 18 years who were diagnosed with hypertensive crisis (blood pressure ≥180 and/or 120 mmHg) and receiving care from the primary care unit and emergency department from 2020 to 2022. The prevalence and clinical characteristics of these patients were examined. Multiple logistic regression analysis was used to analyze factors associated with hypertensive emergency.

Results

Among 3329 patients with hypertension, 17.33% had a hypertensive crisis (16.64 vs. 0.69%, urgency and emergency types). Most patients were female (63.6%), with a median age of 66 years. Almost half the patients (42.2%) with hypertensive crisis presented without specific symptoms, and the most common presenting symptom was vertigo/dizziness (27.7%). The initial and after treatment blood pressures were 203/98 and 174/91 mmHg. In the hypertensive emergency, the most common end-organ damage was ischemic stroke (33.3%), hemorrhagic stroke (25%), and acute heart failure (20.8%). An oral angiotensin-converting enzyme (57.5%) was the most commonly administered medication. Multiple logistic regression was performed but did not reveal any statistically significant.

Conclusion

Our result revealed a high prevalence of hypertensive crises; most were of hypertensive urgency. The most common presenting symptom was vertigo/dizziness. There was no factor significantly associated with the hypertensive emergency in this study. Further studies should explore the cause of the hypertensive crisis to improve care delivery to patients with hypertension.

Clinical Outcomes in Hypertensive Emergency: A Systematic Review and Meta-Analysis

Background To study the prevalence and types of hypertension-mediated organ damage and the prognosis of patients presenting to the emergency department (ED) with hypertensive emergencies. Methods and Results PubMed was queried from inception through November 30, 2021. Studies were included if they reported the prevalence or prognosis of hypertensive emergencies in patients presenting to the ED. Studies reporting data on hypertensive emergencies in other departments were excluded. The extracted data were arcsine transformed and pooled using a random-effects model. Fifteen studies (n=4370 patients) were included. Pooled analysis demonstrates that the prevalence of hypertensive emergencies was 0.5% (95% CI, 0.40%-0.70%) in all patients presenting to ED and 35.9% (95% CI, 26.7%-45.5%) among patients presenting in ED with hypertensive crisis. Ischemic stroke (28.1% [95% CI, 18.7%-38.6%]) was the most prevalent hypertension-mediated organ damage, followed by pulmonary edema/acute heart failure (24.1% [95% CI, 19.0%-29.7%]), hemorrhagic stroke (14.6% [95% CI, 9.9%-20.0%]), acute coronary syndrome (10.8% [95% CI, 7.3%-14.8%]), renal failure (8.0% [95% CI, 2.9%-15.5%]), subarachnoid hemorrhage (6.9% [95% CI, 3.9%-10.7%]), encephalopathy (6.1% [95% CI, 1.9%-12.4%]), and the least prevalent was aortic dissection (1.8% [95% CI, 1.1%-2.8%]). Prevalence of in-hospital mortality among patients with hypertensive emergency was 9.9% (95% CI, 1.4%-24.6%). Conclusions Our findings demonstrate a pattern of hypertension-mediated organ damage primarily affecting the brain and heart, substantial cardiovascular renal morbidity and mortality, as well as subsequent hospitalization in patients with hypertensive emergencies presenting to the ED.

Gender Disparities in Hypertensive Emergency Admissions: A National Retrospective Cohort Study

Background Hypertension is one of the most common conditions affecting almost one in every five adults globally and hypertensive emergency is a life-threatening complication of uncontrolled hypertension leading to significant disability. Despite advances in treatment, gender disparities are yet to be addressed. Methods This retrospective cohort study used nationally representative data from the Healthcare Cost and Utilization Project (HCUP), specifically the National Inpatient Sample, to study two cohorts divided by sex (males and females). The primary outcome was all-cause inpatient mortality. Multivariate logistic regression analysis yielded adjusted odds ratios (aORs) for confounders. Secondary outcomes included length of stay (LOS) and total hospital charges. Multivariate linear regression identified independent predictors. We described crude rates of mechanical ventilation, acute kidney injury (AKI) requiring hemodialysis (HD), and vasopressor requirements. Patient demographics were also presented. We used the chi-squared (χ²) test for categorical variables and Student's t-test for continuous variables. Statistical significance was defined as a two-tailed p-value<0.05. Results A total of 229,025 patients met the inclusion criteria, where 52% were male and 48% were female. The mean patient age was 58 years (55 for men and 62 for women, p <0.001). White patients represented 40% of hospitalizations (males: 37%; females: 42%), black patients represented 42% (males: 43%; females: 41%), and Hispanics 11% (males: 12%; females: 10%). Medicare was the primary payer 47% of the time (males: 38%; females: 56%), Medicaid in 21% (males: 23%; females: 18%), private insurance in 20% (males: 23%; females: 17%), and no insurance in 10% (males: 14%; females: 7%). Female patients had higher rates of chronic obstructive pulmonary disease (COPD) (21% for females vs. 15% for males), connective tissue disease (4.6% for females vs. 0.98% for males; p<0.001), and dementia (6% for females vs. 3% for males). Conversely, males had a higher rate of chronic kidney disease (CKD) (51% vs. 42% for females). Male sex was a predictor of mortality (aOR 1.39, p=0.036), along with age (aOR 1.02, p<0.001) and Charlson Comorbidity Index (http://mchp-appserv.cpe.umanitoba.ca/viewConcept.php?printer=Y&conceptID=1098) (aOR 1.20, p<0.001). Sex was not a predictor of length of stay (LOS) (p=0.496) or total hospital charges (p=0.192). Conclusions In an attempt to achieve better outcomes in patients affected by hypertensive emergency, our retrospective cohort study found that male patients who experienced hypertensive emergency had 39% higher odds of mortality than female patients. Age and Charlson Comorbidity Index were additionally found to be independent predictors of mortality.

Treatment Outcome and Associated Factors Among Patients Admitted with Hypertensive Crisis in Public Hospitals at Harar Town, Eastern Ethiopia: A Cross-Sectional Study

BACKGROUND

Hypertensive crisis is a significant global health issue that raises the costs to healthcare systems and requires specific attention to improve clinical outcome. There is scarce information on hypertensive crisis cases treatment outcome in the study setting.

OBJECTIVE

This study aimed to assess treatment outcome and associated factors among patients admitted with hypertensive crisis at Public Hospitals in Harar Town, Eastern Ethiopia.

METHODS

A cross-sectional study was conducted among 369 hypertensive crisis patients who had been admitted to the emergency department of Hiwot Fana Comprehensive Specialized Hospital and Jugol General Hospital from May 1, 2017, to May 1, 2022. All hypertensive crisis patients who fulfilled the inclusion criteria were included. The data were extracted from medical records using a data abstraction format. The collected data were analyzed using Statistical Package for Social Sciences version 22. Binary logistics regression model using bivariate and multivariable analysis with 95% confidence intervals and P-values were used to determine the association between variables.

RESULTS

The medical records of 369 patients in total were reviewed. Of these, the medical records of 363 patients contained all the necessary information and were used in the study. More than half of the patients (238; 65.6%) were males. Among 363 patients admitted with hypertensive crisis, 98 (27.0%, 95% Confidence Interval (CI):22.5%-31.9%) of them had poor treatment outcome of hypertensive crisis. Being female (Adjusted Odds Ratio (AOR)=3.4; 95% CI=1.7-7.9), residing in rural areas (AOR=2.4; 95% CI=2.7-5.1), taking captopril during admission (AOR=5.6; 95% CI=2.4-7.9), taking antihypertensive treatment before admission (AOR=0.5; 95% CI=0.2-0.9), and being non compliant to treatment (AOR=2.7; 95% CI=1.4-3.5) had statistically significant associations with poor treatment outcome of hypertensive crisis compared to their counterparts.

CONCLUSION

The magnitude of poor treatment outcome of hypertensive crisis was high. Sex, residence, non-compliance, and type of emergency drug administered during admission were substantially related with poor treatment outcome of hypertensive crisis. Health professionals should put great emphasis on emergency drugs administered during admission to achieve the desired outcome.

In‐hospital outcomes of patients with a hypertensive emergency at a medical center, Ethiopia: A prospective observational study

Background

Hypertensive emergency is associated with substantial complications and loss of life across the world. Early identification and treatment of hypertensive emergency complications are critical to prevent or avoid any consequences. Despite this, in Ethiopia, studies addressing mortality rate and its predictors as well as complications of hypertensive emergency are limited.

Aims

This study aim to evaluate in‐hospital mortality of patients admitted with a hypertensive emergency at the emergency ward of Jimma Medical Center.

Methods

A consecutive sample of 140 adult (≥18 years of age) patients with a hypertensive emergency were recruited from September 1, 2020 to February 25, 2021 at Jimma Medical Center, Ethiopia and were followed up from admission to discharge/death. Patients who declined to participate and readmitted during the study period were excluded. To assess factors associated with in‐hospital mortality, bivariate and multivariate Cox regression analyses were performed. A p value of less than 0.05 was used to declare the statistical significance.

Results

Over three‐fourths of the study participants, that is, 108 (77.1%), were males with a mean (±standard deviation) age of 52.8 ± 13.6 years. Hemorrhagic stroke, 53 (38.0%), and acute kidney injury, 38 (27.1%), were the most common complications of hypertensive emergency. The average (±standard deviation) length of stay in the hospital was 8.53 ± 3.61 days. During in‐hospital follow‐up, 16 patients (11.4%, 95% confidence interval: 6.7–17.9) died. Multivariate Cox regression analysis showed that there was a significant relationship between patients not doing regular physical exercise before the current admission (adjusted hazard ratio = 4.629, 95% confidence interval: 1.171–18.294, p = 0.015) and in‐hospital mortality.

Conclusion

More than one‐tenth of patients with hypertensive emergency death was recorded at Jimma Medical Center. The frequent complications of hypertensive emergency were hemorrhagic stroke and acute renal injury. Not doing regular physical exercise before the current admission raises the likelihood of in‐hospital death. Therefore, strengthening and encouraging patients to perform regular physical exercise is imperative.

Hypertensive Emergencies in the Ambulance: Characteristics, Clinical Presentations and Complications - A Prospective Cohort Study

Background

The objective of this study is to describe the characteristics of hypertensive emergencies in Kuwait aiming to provide a preliminary background to update the current guidelines and improve patients’ management.

Methods

This is a prospective analysis of hypertensive emergency cases retrieved from emergency medical services (EMS) archived data between 1 January – 30 June 2020. Collected variables included patient characteristics, clinical presentations, vital signs, interventions, and complications. Outcome variable collected was: en route complications.

Results

Hypertensive emergency prevalence in Kuwait is 4.75 per 100,000. Most were non-Kuwaiti (62%) males (59%) with a mean age of 57 ±14 years. Most hypertensive emergency cases occurred at home (62%). The hypertensive emergency BP threshold was; SBP 182 (SD=31) and diastolic BP (DBP) 108 (SD=18). 36% of hypertensive emergency cases had silent hypertension. 67% of hypertensive emergencies were verified using ambulance verification tools. Nitroglycerin was administered to only hypertensive emergencies suspected to have acute coronary syndrome or acute heart failure (50%). Complications were seen in 9.5% of hypertensive emergency cases.

Conclusion

Hypertensive emergency is rare in the ambulance but can progress into a serious situation. One in every 10 hypertensive emergency cases will require en route resuscitation. Hypertensive emergencies should be recognized and managed within their clinical context. The most common clinical presentation of hypertensive emergency is cardiac chest pain. Some pre-hospital verification tools confirm acute HMOD. Further research is required to establish hypertension emergency recognition and management guidelines in the prehospital setting.