Seasonal variation in hospitalizations due to heart failure in Niterói city, Southeastern Brazil

Jorge, José Eduardo; Cagy, Maurício; Mesquita, Evandro Tinoco; Costa, Thiago; Moscavitch, Samuel Datum; Rosa, Maria Luiza Garcia

doi:10.1590/s0034-89102009000300021

Cited by 12 publications

(10 citation statements)

References 4 publications

(6 reference statements)

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“…This finding has been well described in the literature and is a global phenomenon described in the Northern [2,3,4,5,6,8,12] as well as the Southern hemisphere [7,13]. This seasonal variation is particularly seen in the elderly [3,5,7].…”

Section: Discussionsupporting

confidence: 76%

Seasonal Variation in Hospital Admission in Patients with Heart Failure and Its Effect on Prognosis

et al. 2010

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Background: A seasonal variation in hospital admissions in patients with heart failure (HF) has been described and most admissions occur during the winter season. The effect of this seasonal variation on prognosis is less clear. Objectives: To evaluate the effect of the seasonal timing of hospital admission on clinical outcome in patients with HF. Methods: We prospectively enrolled 362 consecutive patients hospitalized with a definite clinical diagnosis of HF during a 2-year period. Patients were followed clinically for a period of 1 year. Results: There was a prominent seasonal variation in hospital admissions in patients with HF with peak admissions during the winter. The admission rate inversely correlated with the average monthly temperature. Admission during the summer season was a significant predictor of reduced survival (59 vs. 75%, p < 0.01). Cox regression analysis demonstrated that independent predictors of reduced survival after adjustment for other predictors were admission during the hottest 6 months or admission during the summer. In addition, increased mean environmental admission temperature was an independent predictor of reduced survival. Conclusions: Seasonal temperature has a significant effect on the rate of hospital admission in patients with HF. Admission during warmer weather is a sign of a poor prognosis.

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Section: Discussionsupporting

confidence: 76%

Seasonal Variation in Hospital Admission in Patients with Heart Failure and Its Effect on Prognosis

et al. 2010

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“…Hospitalization for HF presented slight variations with higher peak admission during the fall and winter [27]. …”

Section: Studies Of Heart Failure Inpatientsmentioning

confidence: 99%

Heart Failure in South America

Bocchi¹

2013

CCR

100

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Continued assessment of temporal trends in mortality and epidemiology of specific heart failure in South America is needed to provide a scientific basis for rational allocation of the limited health care resources, and strategies to reduce risk and predict the future burden of heart failure. The epidemiology of heart failure in South America was reviewed. Heart failure is the main cause of hospitalization based on available data from approximately 50% of the South American population. The main etiologies of heart failure are ischemic, idiopathic dilated cardiomyopathy, valvular, hypertensive and chagasic etiologies. In endemic areas, Chagas heart disease may be responsible by 41% of the HF cases. Also, heart failure presents high mortality especially in patients with Chagas etiology. Heart failure and etiologies associated with heart failure may be responsible for 6.3% of causes of deaths. Rheumatic fever is the leading cause of valvular heart disease. However, a tendency to reduction of HF mortality due to Chagas heart disease from 1985 to 2006, and reduction in mortality due to HF from 1999 to 2005 were observed in selected states in Brazil. The findings have important public health implications because the allocation of health care resources, and strategies to reduce risk of heart failure should also consider the control of neglected Chagas disease and rheumatic fever in South American countries.

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“…No comparable differences were found in either plasma renin activity or plasma aldosterone concentrations. [140] Furthermore, Cold air exposure of 4°C for 30 min was found reduce the plasma vasopressin levels in human subjects. [213] in another study, Plasma aldosterone (PA) was found significantly increased 59% from summer to winter, whereas plasma norepinephrine (PNE), plasma epinephrine, and plasma renin activity (PRA) increased 19, 2 and 17%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Winter cardiovascular diseases phenomenon

Fares¹

2013

North Am J Med Sci

175

161

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This paper review seasonal patterns across twelve cardiovascular diseases: Deep venous thrombosis, pulmonary embolism, aortic dissection and rupture, stroke, intracerebral hemorrhage, hypertension, heart failure, angina pectoris, myocardial infarction, sudden cardiac death, venricular arrythmia and atrial fibrillation, and discuss a possible cause of the occurrence of these diseases. There is a clear seasonal trend of cardiovascular diseases, with the highest incidence occurring during the colder winter months, which have been described in many countries. This phenomenon likely contributes to the numbers of deaths occurring in winter. The implications of this finding are important for testing the relative importance of the proposed mechanisms. Understanding the influence of season and other factors is essential when seeking to implement effective public health measures.

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Seasonal variation in hospitalizations due to heart failure in Niterói city, Southeastern Brazil

Cited by 12 publications

References 4 publications

Seasonal Variation in Hospital Admission in Patients with Heart Failure and Its Effect on Prognosis

Seasonal Variation in Hospital Admission in Patients with Heart Failure and Its Effect on Prognosis

Heart Failure in South America

Winter cardiovascular diseases phenomenon

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