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Factors associated with incident ischemic stroke in hospitalized heart failure patients: a pilot study

Factors associated with incident ischemic stroke in hospitalized heart failure patients: a pilot study

Hypertension Research 31(2): 289-294

Stroke is sometimes seen in patients with congestive heart failure (CHF). The factors that best predict incident stroke in hospitalized CHF patients are not well known. We performed this pilot study to explore the clinical markers of incident stroke in CHF patients. We studied 111 hospitalized patients with CHF (mean age, 67+/-11 years). Ambulatory blood pressure (BP) monitoring, blood tests, and echocardiography were performed in these patients just before they left the hospital, and all cardiovascular events during the study period were followed for an average of 18+/-9 months. Cox regression analysis was performed to explore the predictors of incident stroke using age, sex, body mass index (BMI), casual and ambulatory systolic BP (SBP), and brain-type natriuretic peptide (BNP). There were 10 stroke events (9%) during the follow-up period. The stroke group had higher nocturnal SBP and plasma BNP levels than the non-stroke group. With Cox regression analysis, both nocturnal SBP and BNP were significant predictors of incident stroke independent of other covariates. When nocturnal BP of 120 mmHg and BNP of 600 pg/mL (75th percentile) were used as cutoffs, nocturnal SBP > or =120 mmHg was associated with a 7-fold increase in the risk of incident stroke, while BNP > or =600 pg/mL was associated with a 46.6-fold increase. However, abnormal circadian BP patterns were not associated with incident stroke. In this pilot study, elevated nocturnal BP and high plasma BNP just before patients left the hospital were significant predictors of stroke events in CHF patients. Further study is needed to confirm this hypothesis.

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Accession: 053193400

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PMID: 18360049

DOI: 10.1291/hypres.31.289

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