Abstract
Backgrounds: Controlled heart rate (HR) and increased pulse pressure (PP) are related to better outcomes in stable heart failure. Hemodynamic response to stress evaluated by an acute hemodynamics index (AHI), the product of HR and PP, has been reported to be associated with poor outcomes in patients admitted for acute decompensated heart failure (ADHF). However, there is no information available on the long-term prognostic value of the serial change of AHI during hospitalization in patients admitted for ADHF. Methods and Results: We studied 259 patients admitted for ADHF and discharged with survival. We measured AHI (HR x PP/1000) at admission and discharge. AHI significantly decreased from admission to discharge (6.98±3.04 to 3.81±1.21 bpm·mmHg, p<0.0001). During a mean follow-up period of 5.0±3.2 yrs, 53 patients had cardiac death. The change [ad-dis] of AHI from admission to discharge (AHI[ad-dis]) was significantly less in patients with than without cardiac death (1.98±2.17 vs 3.47±2.87 bpm·mmHg, p=0.0005). Multivariate Cox regression analysis revealed that AHI[ad-dis], but not PP[ad-dis], was significantly associated with cardiac death, independently of prior heart failure hospitalization, body mass index, estimated glomerular filtration rate, hemoglobin level and left ventricular end-diastolic dimension. ROC analysis revealed that AUC in AHI[ad-dis](0.668[0.588-0.749]) was greater than that in PP[ad-dis](0.637[0.572-0.717]). Patients with less AHI[ad-dis] (≤1.79 bpm·mmHg by ROC analysis) had a significantly higher risk of cardiac death than those with greater AHI[ad-dis] (adjusted hazard ratio: 3.19[1.77 to 5.76], 30% vs 13%, p<0.0001). Conclusions: Cardiac death was frequently observed in ADHF patients who had less degree of the decrease in AHI during hospitalization. The change of AHI during hospitalization would be a simple and useful marker for risk stratification in patients admitted for ADHF.
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