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Comparative Study
Journal Article
Combined Post- and Precapillary Pulmonary Hypertension in Patients With Heart Failure.
Clinical Cardiology 2016 November
BACKGROUND: Pulmonary hypertension (PH) is a well-recognized complication of left ventricular heart failure (HF).
HYPOTHESIS: Differences exist in demographic, clinical, hemodynamic, and survival characteristics of patients with left ventricular HF who have combined postcapillary and precapillary PH (CpcPH), isolated postcapillary PH, or no PH.
METHODS: A secondary data analysis was conducted using a large prospective database of patients undergoing right heart catheterization from 1994 to 2012. One-year mortality postcatheterization was assessed between PH groups using Kaplan-Meier and log-rank techniques, as well as a multivariate Cox proportional hazards model adjusted for age, sex, diabetes, chronic kidney disease, atrial fibrillation, and chronic obstructive pulmonary disease. Mortality rates were calculated for each group as deaths per 100 person-years.
RESULTS: Of the 724 patients identified, 29.4% (n = 213) had no evidence of PH, 63.1% (n = 457) had isolated postcapillary PH, and 7.5% (n = 54) had CpcPH. Compared with no PH, there was an increased mortality rate within 1 year for CpcPH patients (crude hazard ratio: 5.22, 95% confidence interval: 2.06-13.22), but not for isolated postcapillary PH patients (crude hazard ratio: 2.12, 95% confidence interval: 0.99-4.57). Adjusted analyses revealed similar results. Mortality rates per 100 person-years were 3.9, 8.4, and 21.0 for no PH, isolated postcapillary PH, and CpcPH patients, respectively.
CONCLUSIONS: Heart failure patients with CpcPH are associated with increased death rate 1 year post-cardiac catheterization, compared with patients without PH. They are a high-risk PH group and should be evaluated and diagnosed earlier in the disease state.
HYPOTHESIS: Differences exist in demographic, clinical, hemodynamic, and survival characteristics of patients with left ventricular HF who have combined postcapillary and precapillary PH (CpcPH), isolated postcapillary PH, or no PH.
METHODS: A secondary data analysis was conducted using a large prospective database of patients undergoing right heart catheterization from 1994 to 2012. One-year mortality postcatheterization was assessed between PH groups using Kaplan-Meier and log-rank techniques, as well as a multivariate Cox proportional hazards model adjusted for age, sex, diabetes, chronic kidney disease, atrial fibrillation, and chronic obstructive pulmonary disease. Mortality rates were calculated for each group as deaths per 100 person-years.
RESULTS: Of the 724 patients identified, 29.4% (n = 213) had no evidence of PH, 63.1% (n = 457) had isolated postcapillary PH, and 7.5% (n = 54) had CpcPH. Compared with no PH, there was an increased mortality rate within 1 year for CpcPH patients (crude hazard ratio: 5.22, 95% confidence interval: 2.06-13.22), but not for isolated postcapillary PH patients (crude hazard ratio: 2.12, 95% confidence interval: 0.99-4.57). Adjusted analyses revealed similar results. Mortality rates per 100 person-years were 3.9, 8.4, and 21.0 for no PH, isolated postcapillary PH, and CpcPH patients, respectively.
CONCLUSIONS: Heart failure patients with CpcPH are associated with increased death rate 1 year post-cardiac catheterization, compared with patients without PH. They are a high-risk PH group and should be evaluated and diagnosed earlier in the disease state.
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