Seasonal Variation of Cardiac Failure in Northern Nigeria

Ladipo, G. O. A.; Davidson, Neil; Watkins, Helen H.

doi:10.1016/s0140-6736(77)91257-0

Cited by 25 publications

(13 citation statements)

References 4 publications

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“…Parry and colleagues also reported a seasonal increase in cardiac failure in a mixed Nigerian population. However, peaks were due to hot and humid weather and cardiac failure was linked only to elevated female blood pressures, during the same period,25 but Hct was not reported in this study. Although Cheung and colleagues reported their study population of 64.5% African Americans showed the trend of blood pressure increase as temperatures drop,13 the other studies cited did not report inclusion of Africans in the study populations.…”

Section: Discussioncontrasting

confidence: 50%

Seasonal hematocrit variation and health risks in the adult population of Kinshasa, Democratic Republic of Congo

Hightower

Hightower²,

Vázquez³

et al. 2009

VHRM

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Hematocrit (Hct) as an indicator of blood viscosity and mean arterial blood pressure (MAP) were assessed according to the season in adult participants of health screenings conducted throughout Kinshasa, Democratic Republic of Congo. Data was collected at the end of summer (April) and the end of winter (August) and identified by gender. Male Hcts in August were significantly higher (P < 0.0001) than in April (48.3% ± 4.2% and 45.7% ± 2.3%, respectively) while male MAP (85.0 ± 8.4 mm Hg) was identical to that recorded in April (85.4 ± 7.7 mm Hg). August female Hcts (41.4% ± 3.1%) were statistically higher than those recorded in April (39.6% ± 1.9%, P = 0.001), MAP being 82.3 ± 7.3 vs 87.9 ± 6.6 mm Hg, respectively (P = 0.0001). Systolic and diastolic blood pressures, heart rate, body mass indices, ages, and personal and familial medical histories of the August and April groups were not significantly different. This study offers further support for the assertion that the relationship between blood viscosity and pressure of a healthy population shows that increased Hct, and therefore increased blood viscosity is associated with lowered MAP, and presumably peripheral vascular resistance.

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Section: Discussioncontrasting

confidence: 50%

Seasonal hematocrit variation and health risks in the adult population of Kinshasa, Democratic Republic of Congo

Hightower

Hightower²,

Vázquez³

et al. 2009

VHRM

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“…9,11 This study from the southern part of Nigeria has demonstrated significant seasonal variation in hospitalization for heart failure and uncontrolled hypertension but not for cerebrovascular accident (stroke). Seasonal variation for stroke admissions has not been demonstrated here probably because of the small number of subjects with stroke recruited.…”

Section: Discussionmentioning

confidence: 86%

“…A study in Northern Nigeria showed seasonal variation in hospitalization of cases of heart failure due to peripartum cardiomyopathy. 9 Seasonal variation in arterial blood pressure has also been demonstrated among hypertensive patients in the temperate climate. 10 A study from Northern Nigeria clearly showed an increase in hospitalization for hypertension-related morbidities in Sokoto during the cold seasons.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in admission for heart failure, hypertension and stroke in Uyo, South-Eastern Nigeria

et al. 2008

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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'...

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“…The existence of seasonal variation (SV) in blood pressure, 1 pulmonary embolism, 2 incidence of stroke, 3 sudden death, 4 myocardial ischemia, 5 and acute myocardial infarction 6 have been widely investigated. SV in hospitalizations for chronic heart failure was first described in 1977 by Parry and colleagues 7 in Nigeria and confirmed in France in 1999 8 . Data showed an important SV not only in admissions but also in mortality.…”

mentioning

confidence: 82%

Seasonal Variation and Trends in Heart Failure Morbidity and Mortality in a South American Community Hospital

Díaz

Ferrante

Badra

et al. 2007

Congestive Heart Failure

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Circannual variation in cardiovascular events is well-known. Seasonal variation (SV) in heart failure (HF) has been described in the Northern Hemisphere, but there is scarcity of data in South America. The goals of the present study were to (1) describe the SV of admissions and deaths for HF, and (2) describe trends in HF morbidity and mortality in a community hospital in Argentina from 1992 to 1999. The study sample included 6369 admissions. During this period, the number of HF admissions rose by 188% and the rate HF admissions/all admissions increased from 3.28% to 7.84%. In-hospital mortality decreased from 21% to 13%. HF admissions followed a seasonal pattern with a winter-spring predominance. Male and very old patients were the subgroups with the highest SV. The authors identified clear SV in HF deaths and admissions, which raises a different hypothesis about the rationale of HF admissions and provides information for the organization of care and resource allocation.

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Seasonal Variation of Cardiac Failure in Northern Nigeria

Cited by 25 publications

References 4 publications

Seasonal hematocrit variation and health risks in the adult population of Kinshasa, Democratic Republic of Congo

Seasonal hematocrit variation and health risks in the adult population of Kinshasa, Democratic Republic of Congo

Seasonal variation in admission for heart failure, hypertension and stroke in Uyo, South-Eastern Nigeria

Seasonal Variation and Trends in Heart Failure Morbidity and Mortality in a South American Community Hospital

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