1. Welcome Ask The Experts March 24-27, 2007 New Orleans, LA

2. FUSION II: Follow-Up Serial Infusions of Nesiritide for the Management of Patients With Heart Failure Clyde W. Yancy, MD, FACC, FAHA, FACP Medical Director Baylor Heart & Vascular Institute Dallas, TX

3. Results of the Follow-up Serial Infusions of Nesiritide for the Management of Patients With [Advanced] Heart Failure (FUSION II) Trial American College of Cardiology 56 th Annual Scientific Session New Orleans, Louisiana March 25, 2007 Clyde W. Yancy, M.D. on behalf of the FUSION II Steering Committee Henry Krum, MD; Barry M. Massie, MD; Marc A Silver, MD; Lynne W. Stevenson, MD and the FUSION II Investigators

4. FUSION I: Mortality & All-cause Hospitalization (High Risk Patients- ACC/AHA Stage D HF or ‘CDHF’) P=0.03 P=0.23

5. FUSION II Study Design Nesiritide* 1x/wk + Intensive Disease Management (n = 300) Nesiritide* 2x/wk + Intensive Disease Management (n = 300) Phase IIb Double-blind Randomized Multi-center n = 900 Placebo 2x/wk + Intensive Disease Management (n = 150) Placebo 1x/wk + Intensive Disease Management (n = 150) 12 week treatment period 1° and 2 ° Endpoints 12 week blinded follow-up period * Dosing: 2  g/kg bolus, then 0.01  g/kg /min infusion x 4-6 hours Additional Endpoints Yancy CW et al. Am Heart J 2007; in press. Available online 3/10/2007, DOI: 10.1016/j.ahj.2007.02.004

6. Efficacy Endpoints Primary –Time to all cause death or first CV and/or renal hospitalization through Week 12 Secondary* –Number of CV and/or renal hospitalizations adjusted for observation period duration –Days alive and out of hospital –Change in KCCQ summary score –Time to CV death *from day of randomization through week 12, or week 13 for KCCQ Yancy CW et al. Am Heart J 2007; in press. Available online 3/10/2007, DOI: 10.1016/j.ahj.2007.02.004

7. Demographics Placebo Combined Groups Combined GroupsN=306Nesiritide Combined Groups N=605 Age, years, Mean  SD,65  13 Male, (%)72.2%70.4% Ethnicity, (%) Caucasian African American Hispanic Asian 60.1% 23.5% 6.2% 6.5% 64.8% 20.3% 6.0% 6.4% Ischemic etiology, (%) Ischemic Idiopathic Hypertensive 63.4% 20.6% 4.2% 64% 18.7% 5.6% LVEF, Mean  SD25%  8% Body Mass Index, Mean  SD28.9  7.128.3  6.8 NYHA class, (%) III IV 46.1% 53.9% 47.1% 52.9%

8. Baseline Therapy FUSION I vs. FUSION II *Includes both carvedilol and extended release metoprolol in FUSION II and any beta- blocker in FUSION I 530% increase Percent of patients treated 56% increase 160% increase

9. Inotrope Infusions FUSION I vs FUSION II *Refers to exposure to inotropes within 2 weeks of randomization Percent of patients treated Pre-randomization Inotropes Outpatient Inotropes During Study FUSION I FUSION II FUSION I FUSION II

10. FUSION II: Primary Composite Endpoint Through Week 12 Placebo Combined N=306 Nesiritide Combined N=605 *P-value All cause mortality and CV/renal hospitalization † 36.8%36.7%0.79 All Cause Mortality9.6%9.5%0.98 CV/renal hospitalization33.9%32.9%0.95 *P value: NES vs. placebo stratified by dose group † Modified ITT: all treated ITT patients

11. FUSION II: Secondary Endpoints Week 12 Placebo Combined N=306 Nesiritide Combined N=605 *P-value Number of CV/renal Hospitalizations Mean  SD 0.8  1.881.0  3.95 0.38 Days Alive and Out of Hospital 74.8  17.572.5  20.5 0.09 Change in KCCQ Mean  SD 14.2  21.113.0  24.1 0.52 CV Mortality9.2%8.1%0.68 *P value nesiritide vs. placebo stratified by dose group

12. SAFETY Any Adverse Event Placebo Combined Groups N=306Nesiritide N=605 P-value All AEs86.9%88.7%0.45 All drug-related AEs27.5%42.0%<0.01 All SAEs56.5%60.4%0.29 All drug-related SAEs8.2%8.0%0.90 All AEs that caused permanent study drug discontinuation 25.5%27.0%0.63 AE: Adverse event SAE: Serious adverse event that results in death, is life-threatening, requires inpatient hospitalization, or prolongation of existing hospitalization, or results in persistent or significant disability/incapacity.

13. SAFETY Protocol Specified Changes in Serum Creatinine* *Outpatient Clinic Visit Values Only Percent of patients with SCr increases P=0.046 P=0.458 P=0.931

14. FUSION II – Conclusions In this patient population with advanced HF and serial infusions of nesiritide: –No evidence of drug induced renal harm compared to placebo –No evidence of increased mortality at pre-specified endpoints

15. FUSION II - Conclusions In the context of optimal adherence to evidence based medical and device therapies and in concert with excellent disease management, serial infusions of nesiritide did not result in a demonstrable clinical benefit over intensive outpatient management of patients with CDHF Adherence to guideline based therapy AND meticulous follow-up should be optimized for patients with CDHF

16. Question&Answer

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