Article

Fifteen-year evolving trends of etiology and prognosis in hospitalized patients with heart failure

Institute of Geriatric Cardiology, Chinese People'e Liberation Army General Hospital, Beijing 100853, China.
Zhonghua xin xue guan bing za zhi [Chinese journal of cardiovascular diseases] 05/2011; 39(5):434-9.
Source: PubMed

ABSTRACT To investigate the etiological and prognostic changes of hospitalized patients with chronic heart failure.
This retrospective study analyzed 7319 hospitalized patients (male 62.07%) with validated primary discharge diagnosis of chronic heart failure in Chinese PLA General Hospital in Beijing from January 1, 1993 to December 31, 2007. Etiological characteristics, comorbidities and 30-day hospitalized mortality in the following three periods: 1993 - 1997 (n = 1623), 1998 - 2002 (n = 2444), and 2003 - 2007 (n = 3252) were compared.
(1) The patient age increased [(56.0 ± 17.5) years, (57.8 ± 17.6) years and (62.7 ± 15.5) years, P < 0.01] and hospital stay time decreased [(31.3 ± 17.4) days, (22.7 ± 14.1) days and (20.1 ± 15.2) days, P < 0.01] from 1993 to 2007. (2) The common causes of heart failure were coronary heart disease, hypertension, rheumatic valvular heart disease and diabetes mellitus. From 1993 - 1998 to 2003 - 2007, the proportion of patients with coronary heart disease, hypertension and diabetes mellitus rose from 37.2%, 23.3% and 12.3% to 46.8%, 46.7% and 21.1%, respectively (all P < 0.05). Meanwhile the proportion of patients with rheumatic valvular heart disease fell from 35.2% to 16.6% (P < 0.05). (3) The main etiologies and comorbidities were atrial fibrillation, myocardial infarction, pneumonia, chronic obstructive pulmonary disease and renal failure. From 1993 - 1998 to 2003 - 2007, atrial fibrillation was the most common cause of heart failure, and the rate of myocardial infarction, pneumonia and renal failure rose from 11.0%, 8.9% and 5.2% to 14.7%, 14.5% and 9.1%, respectively (all P < 0.05) and the rate of COPD fell from 12.9% to 8.4% (P < 0.05). (4) The 30-day hospitalized mortalities in the three periods were 7.0%, 4.5% and 5.1%, respectively, and the mortalities in the 1998 - 2002 and 2003 - 2007 periods were lower than those of in the 1993 - 1998 period (all P < 0.05). The mortality related to coronary heart disease decreased significantly from 1993 to 2007 (9.3%, 5.0% and 3.8% in the three periods, respectively, P < 0.05).
It is demonstrated that the primary diseases causing heart failure were coronary heart disease, hypertension, diabetes mellitus and rheumatic valvular heart disease, and the former three diseases exhibited a upward trend and the later one exhibited a downward trend. Moreover, the proportion of comorbidities in patients with heart failure increased over the study period. The 30-day hospital mortality exhibited a downward trend and decreased significantly in patients with coronary heart disease or myocardial infarction.

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