Will improved neuroradiology facilities debunk the reported rarity of intracranial aneurysms in Sub-Saharan Africa?

Background: Intracranial aneurysms (IAN) are rare in the Sub-Saharan Africa unlike other parts of the world. The debate is whether the low frequency might be apparent because of the scarcity of advanced neuroimaging services, or real. This study investigated if improved imaging facilities would debunk the rarity of IAN in our subregion. Methods: This is a retrospective cohort study of prospectively recorded data of patients with subarachnoid hemorrhage (SAH) and IAN managed over 19 years (2003-2021), at the study center with a catchment population of over 47 million. The center witnessed progressive improvements in neuroimaging facilities: 2-Slice, 8-slice, and 64-slice computed tomography (CT) and 0.35T, 1.5T magnetic resonance imaging (MRI) during the period. Results: There were 241 cases of SAH, but only 166 aneurysms were confirmed in 158 patients. Between 2003 and 2008, only 27 IAN patients (4.5 IAN/year) were diagnosed. After introduction of CT angiography/magnetic resonance angiography MRA using 8-slice CT/0.35T magnetic resonance imaging (MRI), between 2009 and 2014, the frequency of IAN increased to 8/year. Between 2015 and 2018 after installation of a 64-slice CT in 2014, the IAN remained the same (8/year). MRI 1.5T was added in 2018, the frequency doubled to 17 cases/year. The females were more (67.7%), the mean age was 46.3 years, but peak incidence was the sixth decade. Internal carotid artery aneurysms including posterior communicating artery were the most common (43%) followed by ACA with anterior communicating artery (24%) and middle cerebral artery (20%). Multiple aneurysms were seen in ten patients. Conclusion: Improved neuroimaging between 2003 and 2021 did not debunk the rarity of IAN in our region.

Prevalence of hypertension in a rural community in southeastern Nigeria; an opportunity for early intervention.

Hypertension is a leading cause of non-communicable morbidity in Sub Saharan Africa. Recent studies suggest and increase in the prevalence of hypertension in rural Sub-Saharan Africa. Using a three-phase approach, a structured questionnaire was used to determine the prevalence of hypertension in a rural settlement is Enugu State, Southeast Nigeria. Blood pressure measurement was done according to the guidelines of the European Society of Hypertension. Out of 1576 participants aged 18 years and above, 1082 (68.7%) completed the full survey, their blood pressure was measured, and data analyzed. The prevalence of hypertension in this study was 27.6%, (95%CI 25-30.4), similar in males 29.2, (95%CI 24.7-30.4) and females 26.8%, (95%CI 23.5-30.2). p = 0.39. The prevalence of hypertension increased with age reaching a peak of 32.8% (95%CI 26.2-40) in the 40-49 age group, however this was not statistically significant P = 0.22. This age-related increase in the prevalence of hypertension tended towards significance in males (p = 0.05) but not in females (p = 0.44). Awareness of hypertension was 7.2%. Systolic blood pressure positively correlated with older age, higher blood glucose levels and waist-hip ratio. Diastolic blood pressure correlated with the type of work the patients is involved in and blood glucose levels. In conclusion, the prevalence of hypertension in a rural southeastern Nigeria community was 27.6%, however awareness was very low (7.9%). Most participants had mild hypertension thus offering a window of opportunity for public health educators in preventing the complications of hypertension. There is therefore the need for awareness campaigns to be intensified in rural communities.

Balo's concentric sclerosis a rare variant of multiple sclerosis in a Nigerian adult male: A case report.

Background: Balo's concentric sclerosis (BCS) is a rare variant of multiple sclerosis (MS) that usually runs a benign course. Typically, brain magnetic resonance imaging (MRI) shows concentric lamella of areas of demyelination alternating with normal zones of myelin preservation. Clinically, it may be mistaken for other intracranial space-occupying lesions, especially in our subregion, where neuroimaging facilities are scarce or not affordable. The authors report a rare case of BCS in a young Nigerian male diagnosed and managed in Enugu, Nigeria. This is possibly the first reported case in sub-Saharan Africa. Case Description: The patient presented with behavioral changes, focal seizures, cranial neuropathy, long tract signs, and cerebellar dysfunction causing severe disability and functional impairment with a Modified Rankin Score (mRS) of 4. Brain MRI showed multiple heterogeneous lesions in the right cerebral hemisphere, brainstem, and cerebellum with features in keeping with BCS. Cerebrospinal fluid oligoclonal bands were negative and C-reactive protein was normal. He had high-dose steroids and immunosuppressive therapy. He made a gradual neurological improvement and significant symptom resolution and was able to return to work after a year (mRS-1). Conclusion: BCS is a rare variant of MS in sub-Saharan Africa. The mainstay of diagnosis is MRI which shows the typical concentric demyelinating pattern. Steroids and immunosuppressive therapy are effective in the treatment of BCS.

Obesity in patients with hypertension attending a medical outpatient clinic in a tertiary health facility in Enugu, Southeast Nigeria.

Introduction: The prevalence of obesity is increasing in sub-Saharan Africa which reflects the current global trend. Epidemiological data have consistently shown a strong relationship between obesity and hypertension in Africans, and this association is stronger for central obesity. The aim of this study was to describe the pattern of overweight/obesity among patients living with hypertension in a tertiary hospital in Enugu, Southeast Nigeria. Methods: This was a cross-sectional study conducted in the Medical Out-Patient Clinic of the Enugu State University Teaching Hospital in Enugu, Enugu State, Southeast Nigeria. Data were analyzed using the SPSS version 22. Results: Data were collected from a total of 450 consenting patients, most of whom 64% (288) were females. The mean body mass index (BMI) was 28.9 ± 6.1 kg/m2 higher in females than males (29.8 ± 6.5 kg/m2 vs. 26.7 ± 5.2 kg/m2, P < 0.001). The gender distribution of classes of obesity showed female preponderance. A little more than one-third of the patients were overweight, whereas about four out of every ten patients were obese. While overweight did not differ significantly across gendeWr (P = 0.67), more feWmales than males were significantly obese (P < 0.001). The age distribution of BMI showed increasing rates of underweight and decreasing rate of morbid obesity with age. About 86.8% of the females had substantially increased waist circumference compared to 26.5% of the males. Overall, 53% of the males and 97.6% of the females have abnormal waist circumferences. Waist-hip ratio was equally abnormal in 89.3% of the study population even though no statistically significant difference was observed across gender. Conclusion: Overweight and obesity are common among patients with hypertension as demonstrated in this study. There is need to set up an aspect of health education which specifically sensitizes the public against the untoward consequences of overweight and obesity.

RésuméIntroduction: La prévalence de l'obésité augmente en Afrique subsaharienne (ASS), ce qui reflète la tendance mondiale actuelle. Les données épidémiologiques ont constamment montré une forte relation entre l'obésité et l'hypertension chez les Africains et cette association est plus forte pour l'obésité centrale. Le but de cette étude était de décrire le schéma de surpoids / obésité chez les patients souffrant d'hypertension dans un hôpital tertiaire à Enugu, dans le sud-est du Nigeria. Méthodes: Il s'agit d'une étude transversale menée dans la clinique de consultations externes de l'hôpital universitaire d'Enugu State University à Enugu, dans l'État d'Enugu, dans le sud-est du Nigéria. Les données ont été analysées à l'aide de la version 22 de SPSS. Résultats: Les données ont été recueillies auprès d'un total de 450 patients consentants, dont 64% (288) étaient des femmes. L'IMC moyen était de 28,9 ± 6,1) kg / m2 plus élevé chez les femmes que chez les hommes 29,8 ± 6,5) kg / m2 contre 26,7 ± 5,2 kg / m2, p <0,001). La répartition par sexe des classes d'obésité a montré une prépondérance féminine. Un peu plus d'un tiers des patients étaient en surpoids, tandis qu'environ quatre patients sur dix étaient obèses. Bien que le surpoids ne diffère pas significativement selon le sexe (p = 0,67), plus de femmes que d'hommes étaient significativement obèses. (P <0,001). La répartition par âge de l'IMC a montré une augmentation du taux d'insuffisance pondérale et une diminution du taux d'obésité morbide avec l'âge. Environ 86,8% des femmes avaient considérablement augmenté le tour de taille, contre 26,5% des hommes. Dans l'ensemble, 53% des hommes et 97,6% des femmes ont des circonférences de taille anormales. Le rapport taille / hanche était également anormal et anormal dans 89,3% de la population étudiée, même si aucune différence statistiquement significative n'a été observée entre les sexes. Conclusion: Le surpoids et l'obésité sont courants chez les patients souffrant d'hypertension, comme démontré dans cette étude. Il est nécessaire de mettre en place un aspect de l'éducation sanitaire qui sensibilise spécifiquement le public aux conséquences fâcheuses du surpoids et de l'obésité.

Reported Incidence of Cluster Seizures in Persons with Epilepsy Experience from Two Tertiary Hospitals in Enugu Southeast Nigeria.

Background: Repetitive seizures are neurological emergencies which may occur in people with epilepsy. Ascertaining the incidence of these episodes of such seizures in the community is wrought with many challenges and few reports exist in sub-Saharan Africa, a region with a high burden of epilepsy. The aim of this study was to describe the caregiver reported frequency of acute recurrent seizures in people with epilepsy attending neurology outpatient clinic in Enugu. Methods: This cross-sectional study was performed in the medical out-patient clinics in Enugu Nigeria. Data were collected using a structured questionnaire from an existing epilepsy register. Cluster seizures were defined as frequent repetitive seizures (two or more) occurring more than usual within a week. Epilepsy was defined based on ILAE criteria. Results: A total of 73(45.3%) reported a lifetime history of cluster seizures; similar in males 39(48.1%) and females 34(45.9%). P=0.73. About36.4% and 38.2% of PWE who had a history of traumatic brain injury and stroke had also experienced at least one SC. A large proportion of PWE with SC also had experienced status epilepticus in the past. Seizure cluster was correlated by older age of onset, having various forms of seizures and longer seizure freedom. Conclusions: The reported lifetime history of cluster seizures among people with epilepsy attending a tertiary hospital clinic is high. This may suggest both poor seizure control and severity. Careful patient education will improve both adherence and emergency management of epilepsy to reduce the morbidity of epilepsy in the community.

Pattern and determinants of self-reported enacted stigma among rural dwellers living with epilepsy attending a tertiary health facility in Enugu State Nigeria.

PURPOSE: Epilepsy related stigma is a barrier to recovery and has been linked to a broad range of psychosocial consequences and has the potential to influence the provision of care to people with epilepsy. Understanding the determinants of enacted stigma in epilepsy is relevant in the understanding of the burden of epilepsy in Nigeria. METHOD: Using a semi-structured questionnaire, a cross-sectional descriptive study was conducted among rural dwellers receiving treatment for epilepsy in a tertiary referral specialist hospital in Enugu, south east Nigeria. RESULTS: The participants consisted of 108 patients, 63% of whom were males. Most patients 99(91.7%) reported experiencing stigma in the past. The commonest forms of enacted stigma were being regarded as having 'spiritual attack' 88(81.5%) and restraining from interacting with others 49(45.4%). Most individuals who received nonorthodox treatment 55(55.6%) experienced stigma. Severely stigmatized individuals were more likely to be females. Age of onset of epilepsy, use of non-orthodox treatment, seizures occurrence in public places and the presence of physical injuries positively correlated with enacted stigma. CONCLUSIONS: The burden of epilepsy related enacted stigma is high among rural dwellers attending a tertiary medical outpatient clinic in Enugu, southeast Nigeria.

EpiNet as a way of involving more physicians and patients in epilepsy research: Validation study and accreditation process.

OBJECTIVE: EpiNet was established to encourage epilepsy research. EpiNet is used for multicenter cohort studies and investigator-led trials. Physicians must be accredited to recruit patients into trials. Here, we describe the accreditation process for the EpiNet-First trials. METHODS: Physicians with an interest in epilepsy were invited to assess 30 case scenarios to determine the following: whether patients have epilepsy; the nature of the seizures (generalized, focal); and the etiology. Information was presented in two steps for 23 cases. The EpiNet steering committee determined that 21 cases had epilepsy. The steering committee determined by consensus which responses were acceptable for each case. We chose a subset of 18 cases to accredit investigators for the EpiNet-First trials. We initially focused on 12 cases; to be accredited, investigators could not diagnose epilepsy in any case that the steering committee determined did not have epilepsy. If investigators were not accredited after assessing 12 cases, 6 further cases were considered. When assessing the 18 cases, investigators could be accredited if they diagnosed one of six nonepilepsy patients as having possible epilepsy but could make no other false-positive errors and could make only one error regarding seizure classification. RESULTS: Between December 2013 and December 2014, 189 physicians assessed the 30 cases. Agreement with the steering committee regarding the diagnosis at step 1 ranged from 47% to 100%, and improved when information regarding tests was provided at step 2. One hundred five of the 189 physicians (55%) were accredited for the EpiNet-First trials. The kappa value for diagnosis of epilepsy across all 30 cases for accredited physicians was 0.70. SIGNIFICANCE: We have established criteria for accrediting physicians using EpiNet. New investigators can be accredited by assessing 18 case scenarios. We encourage physicians with an interest in epilepsy to become EpiNet-accredited and to participate in these investigator-led clinical trials.

Prevalence of active convulsive epilepsy in an urban slum in Enugu South East Nigeria.

PURPOSE: To determine the prevalence of active convulsive epilepsy and treatment gap in two Urban slums in Enugu South East Nigeria. METHODS: A 3 phase cross-sectional descriptive study was done to survey individuals ≥ 15 years in 2 slums in Enugu, South East Nigeria. RESULTS: The prevalence of epilepsy was 6.0 (95% CI: 5.9-6.0) per 1000 (men 4.4/1000, 95% CI: 2.3-6.4, women 7.8/1000, 95% CI: 4.9-10.4), p=0.06. The peak age of active convulsive epilepsy was 40-44 years (11.2 per 1000) with two smaller peaks at 25-29 and ≥ 50 years. The age and sex adjusted prevalence using WHO standard population and 2006 Nigerian census population were 5.9 per 1000 (95% CI: 4.0-7.9) and 5.4 per 1000 (95% CI: 3.4-7.4). CONCLUSION: The prevalence of epilepsy is high in urban slums in Enugu. Nationwide studies should be done to find out the true prevalence in the country.

Levetiracetam-induced rage and suicidality: Two case reports and review of literature.

BACKGROUND: Levetiracetam-induced rage is a rare neurobehavioral adverse effect of levetiracetam that is characterized by seething rage, uncontrollable anger, fits of fury, depression, violence, and suicidal tendencies. It occurs more in patients with prior mood or psychotic disturbances. No such case has been reported in Nigeria. METHOD: We report two cases of levetiracetam-induced rage. The first patient was a 29-year-old male with a 14-year history of intractable posttraumatic epilepsy. He was initially placed on sodium valproate and phenobarbitone and later had phenobarbitone replaced with levetiracetam. Within the first week of initiating levetiracetam, he became aggressive, bursted into fits of fury, and attacked his siblings. Levetiracetam was stopped, and the seething rage ceased only to reappear when it was reintroduced; hence, the complete withdrawal of levetiracetam. Naranjo probability score for adverse drug reaction was 8. RESULTS: The second patient was a 23-year-old lady who developed seething rage and made several attempts to kill herself with a knife following addition of levetiracetam to the clonazepam and carbamazepine that she was taking for treatment-resistant epilepsy. Withdrawal and reintroduction of levetiracetam by the relatives led to cessation and reemergence, respectively, of the rage and suicidal tendencies. Naranjo score was 8. Levetiracetam was discontinued. CONCLUSION: Neuropsychiatric evaluation for prior mood or psychiatric disorders in those initiating levetiracetam therapy is suggested alongside monitoring for early features of levetiracetam-induced rage by both caregivers and physicians. This will help stem the morbidity and potential mortality associated with this life-threatening adverse drug reaction.

Headache prevalence and its characterization amongst hospital workers in Enugu, South East Nigeria.

BACKGROUND: Headaches are probably the commonest neurological complaint worldwide. Amongst workers it contributes significantly to loss of productive time and work efficiency. It is an important cause of disability and reduced quality of life. The prevalence and pattern amongst health workers in Africa has not been extensively studied. OBJECTIVE: This epidemiological sampling-based preliminary study examined the frequency and pattern of headache in a population of health workers of a tertiary hospital in Enugu, South East Nigeria. METHODS: Study participants, recruited by balloting, completed a self-administered questionnaire to screen for headache and its associations (defined as headache unrelated to fever and experienced within 6 months prior to the date the questionnaire was administered). Data analysis was by SPSS version 16. Ethical approval was obtained from the Hospital Ethical Review Committee. RESULTS: One hundred and thirty-three workers aged 18 - 70 years, were evaluated (males 53.4%, n=71 and females 46.6%, n=62). Headache was experienced by 88% of workers with primary headaches constituting more than 70% of cases. Females were more affected in both instances. Primary and secondary headaches occurred more in younger and older workers respectively and the association was significant (P <0.05). Headaches were not a significant cause of disability and loss of productivity. CONCLUSION: Headaches are very prevalent in hospital workers in Enugu, Nigeria. In older workers screening for underlying causes is indicated. Disability, work absenteeism and loss of productive time are minimal despite the high headache prevalence.

Prevalence of primary headaches in an urban slum in Enugu South East Nigeria: a door-to-door survey.

OBJECTIVE/BACKGROUND: This study aims to determine the prevalence of primary headache disorders using the second edition of international classification of headache disorders among urban slum dwellers. Headache is a common neurological disorder and one of the most common reasons for visiting the neurology clinics in Nigeria. Low socioeconomic status has been linked with primary headaches. Factors that may precipitate and sustain headaches are common in Africa especially in urban slums. There are limited population based data on the prevalence of headache from Nigeria and other African countries. METHODS: A 3 phase cross-sectional descriptive study was done to survey at least 40% of the adult population (Igbos) living in an urban slum using the International Classification of Headache Disorders 2nd Edition (ICHD-I) criteria using a validated Igbo language adaptation (translation and back-translation into Igbo language) of a World Health Organization protocol for screening neurological disorders in the community. RESULTS: The lifetime prevalence of headache of any type was 66.7% (95% confidence interval [CI] 64.2-69.2), significantly higher in females (70.2% [95% CI 67.0-73.4]) than in males (62.3% [95% CI 58.5-66.1]; P = .0.002). The prevalence of primary headaches was also significantly lower in males than in females (44.9% [95% CI 45.5-53.3] vs 53.2% (95% CI 49.3-57.1), P = .002). Female (52.1%) drinkers had a statistically higher prevalence of primary headaches than male drinkers (43.6%; P = .004). The prevalence of migraine was 6.4% (95% CI 5.1-7.7); 7.5% (95% CI 5.6-9.4) in females and 5% (95% CI 3.3-6.7) in males (P = .058). Migraine with aura was similar in both males and females. Migraine without aura was significantly higher in females (5.7%) than males (3.1%) (P = .022). Tension-type headache (TTH) had an overall prevalence of 13.8% (95% CI 11.3-16.3), males 12.2% (95% CI 9.7-14.7), and females 15.1% (95% CI 12.6-17.6; P = .118.) The peak decade for all primary headaches was 20-29 years for males (49.8%) and 60-69 years for females (57.5%). CONCLUSION: Headache is a common health problem in an urban slum in Enugu south east Nigeria where 66.7% of participants had experienced headache in their lifetime, and 49.4% had experienced primary headaches. The prevalence of migraine and TTH were 6.4% (5% in males and 7.5% in females) and 13.8% (12.2% in males and 15.1% in females), respectively. The peak ages of migraine and tension-type headache were 30-39 and 60-69 years, respectively. The prevalence of primary headaches was significantly higher among subjects who used alcohol significantly.

Knowledge, attitude and practice of epilepsy among community residents in Enugu, South East Nigeria.

PURPOSE: The understanding of the opinions of the Nigerian public about epilepsy and its treatment is relevant to the reduction of the large treatment gap that exists in management of the condition. The major aim of this study was to determine the knowledge and attitudes of urban dwellers to epilepsy and its treatment and to identify the gaps in knowledge that could pose as barriers in the treatment and care of epilepsy patients within the community. METHOD: This cross-sectional and descriptive study was carried out in one of the districts of Enugu metropolis, Nigeria. Data collection was by means of a semi-structured validated questionnaire. RESULTS: The mean score in knowledge was low, 48.1±18.8%; higher in females (50.6±18.6%, p=0.03 and those who had witnessed seizures in the past 49.7±18.8, p<0.01. On attitudes, 61.8% of the respondents accepted that it is right if sufferers married but most (93.2%) would not marry them and 87.2% would not allow them to have children or make a new acquaintance by working or playing with them (72.8%). There were no significant differences in the attitude scores of respondents with different levels of education. CONCLUSION: The level of knowledge of epilepsy in among urban dwellers in SE Nigeria is low and fraught with misconceptions and gaps. There were no significant differences in the attitude scores of respondents with different levels of education. There is a need for a multi-faceted educational interventions directed at improving the awareness and understanding of the condition by all segments of the society.

Heart rate variability on antihypertensive drugs in black patients living in sub-Saharan Africa.

BACKGROUND: Compared with Caucasians, African Americans have lower heart rate variability (HRV) in the high-frequency domain, but there are no studies in blacks born and living in Africa. METHODS: In the Newer versus Older Antihypertensive agents in African Hypertensive patients trial (NCT01030458), patients (30-69 years) with uncomplicated hypertension (140-179/90-109 mmHg) were randomized to single-pill combinations of bisoprolol/hydrochlorothiazide (R) or amlodipine/valsartan (E). 72 R and 84 E patients underwent 5-min ECG recordings at randomization and 8, 16 and 24 weeks. HRV was determined by fast Fourier transform and autoregressive modelling. RESULTS: Heart rate decreased by 9.5 beats/min in R patients with no change in E patients (- 2.2 beats/min). R patients had reduced total (- 0.13 ms²; p = 0.0038) and low-frequency power (- 3.6 nu; p = 0.057), higher high-frequency (+ 3.3 nu; p = 0.050) and a reduced low- to high-frequency ratio (- 0.08; p = 0.040). With adjustment for heart rate, these differences disappeared, except for the reduced low-frequency power in the R group (- 4.67 nu; p = 0.02). Analyses confined to 39 R and 47 E patients with HRV measurements at all visits or based on autoregressive modelling were confirmatory. CONCLUSION: In native black African patients, antihypertensive drugs modulate HRV, an index of autonomous nervous tone. However, these effects were mediated by changes in heart rate except for low-frequency variability, which was reduced on beta blockade independent of heart rate.

Progress report on the first sub-Saharan Africa trial of newer versus older antihypertensive drugs in native black patients.

BACKGROUND: The epidemic surge in hypertension in sub-Saharan Africa is not matched by clinical trials of antihypertensive agents in Black patients recruited in this area of the world. We mounted the Newer versus Older Antihypertensive agents in African Hypertensive patients (NOAAH) trial to compare, in native African patients, a single-pill combination of newer drugs, not involving a diuretic, with a combination of older drugs including a diuretic. METHODS: Patients aged 30 to 69 years with uncomplicated hypertension (140 to 179/90 to 109 mmHg) and ≤2 associated risk factors are eligible. After a four week run-in period off treatment, 180 patients have to be randomized to once daily bisoprolol/hydrochlorothiazide 5/6.25 mg (R) or amlodipine/valsartan 5/160 mg (E). To attain blood pressure <140/<90 mmHg during six months, the doses of bisoprolol and amlodipine should be increased to 10 mg/day with the possible addition of up to 2 g/day α-methyldopa. RESULTS: At the time of writing of this progress report, of 206 patients enrolled in the run-in period, 140 had been randomized. At randomization, the R and E groups were similar (P ≥ 0.11) with respect to mean age (50.7 years), body mass index (28.2 kg/m(2)), blood pressure (153.9/91.5 mmHg) and the proportions of women (53.6%) and treatment naïve patients (72.7%). After randomization, in the R and E groups combined, blood pressure dropped by 18.2/10.1 mmHg, 19.4/11.2 mmHg, 22.4/12.2 mmHg and 25.8/15.2 mmHg at weeks two (n = 122), four (n = 109), eight (n = 57), and 12 (n = 49), respectively. The control rate was >65% already at two weeks. At 12 weeks, 12 patients (24.5%) had progressed to the higher dose of R or E and/or had α-methyldopa added. Cohort analyses of 49 patients up to 12 weeks were confirmatory. Only two patients dropped out of the study. CONCLUSIONS: NOAAH (NCT01030458) demonstrated that blood pressure control can be achieved fast in Black patients born and living in Africa with a simple regimen consisting of a single-pill combination of two antihypertensive agents. NOAAH proves that randomized clinical trials of cardiovascular drugs in the indigenous populations of sub-Saharan Africa are feasible.