Background: Seasonal variation in hospitalization for cardiovascular disease has been described in the temperate regions of the world as well as in Northern Nigeria. Increase admission rates during the cold seasons have been reported in these areas. No studies have been done in Southern Nigeria. This study is thus aimed at describing the seasonal variation in admissions for heart failure, uncontrolled hypertension and hypertension related-stroke in Southern Nigeria. Methods: Hospital records of patients admitted to the medical wards of the University of Uyo Hospital (UUTH) with heart failure of all causes, uncontrolled hypertension and hypertension -related stroke (Cerebrovascular accident) between January 1998 and December 2001 were used. Epi-Info 2002 software was used to analyze data. Results: Of the 3500 patients admitted during the study period 542 (15.3%) were on account of heart failure, uncontrolled hypertension and hypertension related cerebrovascular accident (CVA). The mean age of patients was 52 ± 12.8 years. The average monthly admission was eleven (11). More admissions were recorded in the rainy (cold) season than in the dry (hot) season. The observed difference was however statistically significant only for heart failure and uncontrolled hypertension (P<.05). Conclusion: Admissions for heart failure and uncontrolled hypertension are therefore more during the wet (cold) season in southern Nigeria. This may be attributed to the high default rate to follow up visit in this season when agricultural activity is intense and less attention given to medical care. This leads to poor compliance to medications and clinical deterioration. The already bad road network both in rural and urban centers also become worse at this time making access to medical care difficult. Facilities and measures should thus be put in place to provide adequate medical care for these patients during that period of the year.
Key words: Admissions, seasonal variation, cardiovascular diseases
RésuméCulture générale: des variations saisonnières dans l'hospitalisation pour les maladies cardiovascule ont été signale dans les régions tempères du monde aussi bien que dans le nord du Nigeria. On a note une augmentation d'hospitalisation dans ces régions pendant les saisons de pluies. Aucune recherche n'a été faite au sud du Nigeria. Le but de cette étude est donc de signaler les variations saisonnières dans l'hospitalisation des cas comme ; insuffisance cardiaque, l'hypertension non maîtrisée et l'attaque d'apoplexie lié a l'hypertension dans le sud du Nigeria. Modalité: on s'est servi des registres d'hôpital pour surveiller les malades hospitalisés au centre hospitalier universitaire d'Uyo pour les cas comme: insuffisance cardiaque de toute sortes, Résultat: parmi les 3500 malades hospitalisés pendant la période des recherches, 542 d'eux (5.3%) étaient a cause de l'insuffisance cardiaque, l'hypertension non maîtrisée et des accidents cerebrovasculaire liés a l'hypertension (ACV). L'age moyen des malades était 52+12.8 ans ; et l'...
