The purpose of this study was to collect safety and tolerability data on LCZ696 in eligible PARADIGM-HF patients who received open-label investigational drug. The parent PARADIGM-HF (NCT01035255) trial was terminated early due to compelling efficacy of LCZ696 in patients with heart failure with reduced ejection fraction (HFrEF) after the final pre-specified interim analysis in March 2014.

Inclusion Criteria:

1. Written informed consent for the extension must be obtained before any assessment is performed.
2. Patients who have completed PARADIGM-HF (protocol CLCZ696B2314) and are able to be safely enrolled into the open-label trial as judged by the investigator.

Exclusion Criteria:

1. Use of other investigational drugs at the time of enrollment, or within 30 days or 5 half-lives of enrollment, whichever is longer
2. History of hypersensitivity or allergy to any of the study drugs, drugs of similar chemical classes, ACEIs, ARBs, or NEP inhibitors as well as known or suspected contraindications to LCZ696
3. Known history of angioedema
4. Requirement of simultaneous treatment with both ACEIs and ARBs
5. Current acute decompensated HF (exacerbation of chronic HF manifested by signs and symptoms that may require intravenous therapy)
6. Symptomatic hypotension and/or a SBP < 100 mmHg at Visit 1 (screening)
7. Estimated GFR < 30 mL/min/1.73m^2 as measured by the simplified MDRD formula at Visit 1 (screening)
8. Presence of bilateral renal artery stenosis
9. Serum potassium > 5.2 mmol/L at Visit 1 (screening)
10. Evidence of hepatic disease as determined by any one of the following: AST or ALT values exceeding 3 x ULN at Visit 1, history of hepatic encephalopathy, history of esophageal varices, or history of portacaval shunt
11. Pregnant or nursing (lactating) women
12. Women of child-bearing potential
13. Any condition, not identified in the protocol, that in the opinion of the investigator is likely to prevent the patient from safely tolerating LCZ696 or complying with the requirements of the study.

Novartis is committed to sharing with qualified external researchers, access to patient-level data and supporting clinical documents from eligible studies. These requests are reviewed and approved by an independent review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations.

This trial data availability is according to the criteria and process described on www.clinicalstudydatarequest.com