Influence of Blood Pressure on the Effectiveness of a Fixed-Dose Combination of Isosorbide Dinitrate and Hydralazine in the African-American Heart Failure Trial
Inder S. Anand, MD, FACC, FRCP, DPhil (Oxon)*, ,*,
S. William Tam, PhD ,
Thomas S. Rector, PhD*,
Anne L. Taylor, MD, FACC ,
Michael L. Sabolinski, MD ,
W. Tad Archambault, PhD ,
Kirkwood F. Adams, MD||,
Adeoye Y. Olukotun, MD ,¶,
Manuel Worcel, MD and
Jay N. Cohn, MD, FACC
* VA Medical Center
University of Minnesota, Minneapolis, Minnesota
NitroMed, Inc., Lexington, Massachusetts
Virtu Stat, Ltd., North Wales, Pennsylvania
|| University of North Carolina, Chapel Hill, North Carolina
¶ CR Strategies, LLC, Princeton, New Jersey

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Figure 1 Effect of Baseline SBP on Mortality and Morbidity
Kaplan-Meier curves for mortality (left) and for mortality or the first hospitalization for heart failure (right), by quartiles of baseline systolic blood pressure (SBP).
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Figure 2 Effect of FDC I/H Treatment on Mortality and Morbidity by Median Baseline SBP
Effectiveness of fixed-dose combination of isosorbide dinitrate and hydralazine (FDC I/H) treatment on mortality and morbidity in patients above or below the median baseline systolic blood pressure (SBP) shown as point estimates of the hazard ratios (HR) with 95% confidence intervals (CI). HF = heart failure.
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Figure 3 Time Course of Mean SBP and DBP Change in the Placebo and FDC I/H Groups
Note that blood pressure decreased in the active treatment group soon after starting treatment, with no further change in blood pressure over time. The p values compare changes between treatment groups: *p < 0.05; **p < 0.01. DBP = diastolic blood pressure; FDC I/H = fixed-dose combination of isosorbide dinitrate and hydralazine; SBP = systolic blood pressure.
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