Background: Hypertension is one of the major factors for high mortality of adults in Africa. However, complications occur at lower values than those previously classified as hypertension. Thus, prehypertension is considered as a new category of hypertension and a major risk factor for developing clinical hypertension relative to those with normotension, it has been linked with increased future risk of hypertension as well as cardiovascular diseases.Objectives: The objective of this review was to determine prevalence of prehypertension and describe the associated factors of prehypertension in Africa during the past 10 years. Methods:We did a systematic review using the databases PubMed/Medline, and search engine google scholar. We selected sources of publications and conducted an analysis of articles. Keywords in English were: prehypertension, high normal blood pressure, high blood pressure, elevated blood pressure, Africa. Keywords in french were: préhypertension artérielle, préhypertension, pression artérielle normale haute, pression artérielle normale, Afrique.Mesh terms were: Prehypertension, Africa.Results: Twenty-seven articles were selected. Prevalence of prehypertension ranged from 2.5% to 34% in children and adolescents. In adults, prevalence varied from 32.9% to 56.8%. Several factors were associated with prehypertension in Africa. These factors included: age; sex; lifestyle such as smoking, alcohol consumption, low physical activity, overweight and obesity. There were also cardiometabolic factors and few others factors which were associated with prehypertension. Conclusion:This review allowed us to observe that the prevalence of prehypertension was variable according to age of the population and prehypertension is associated with several factors.

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Background: New classification of heart failure according to ejection fraction calls for exploring in black Africans. Objectives: To determine our patient's characteristics and prognosis of the subtypes of heart failure. Methods: We analysed data from consecutive black African patients hospitalised for heart failure at Heart Institute of Abidjan in 2018 and followed up for one year. Results: Were considered 251 heart failure patients (age: 55.5 ± 16.3 years, 63.7% of males) with preserved (HFpEF) (18.7%), mid-range (HFmrEF) (17.6%), and reduced ejection fraction (HFrEF) (63.7%). HFpEF patients were older (p <0.0001) and had more frequently. acute pulmonary oedema. From an echocardiographic point of view, HFpEF patients had, on average, a smaller left ventricle than the other patients (p <0.001), but a larger left atrium (p <0.05). Clinically, these patients were admitted more often with acute pulmonary oedema (p = 0.01) and had more often comorbidities (p=0.00)4. However, survival was better with HFpEF patients than HFrEF patients (log-rank = 4.61; p = 0.032). HFmrEF patients have an intermediate profile. Conclusion: In our context, although they have the same expression, HFrEF and HFPEF appear very different. We need further studies for a better understanding of HFmrEF.