This study is a multicenter non-interventional observational prospective registry. This non-interventional study (NIS) does not imply any intervention into a routine clinical practice, including choice of treatment modality or special methods of investigation. The study will include only those patients who sign the informed consent form (ICF) after explanation of the study objectives and methods by the study physician.

Planned study population consists of 20 000 adult outpatients with HF. All patients with HF who signed an ICF will be included to this study. Planned number of study sites is 150 outpatient centers in about 50 regions (in order to describe characteristics of outpatients with HF in different regions in the most comprehensive way).

Expected inclusion period duration - 24 months OR reaching 20 000 patients, if this takes less than 24 months. Planned follow-up period duration for 1 patient is about 52 weeks (12 months), which includes 3 visits (visit 1 - inclusion; visit 2 - approximately 6 months after inclusion; visit 3 - approximately 12 months after inclusion)

Inclusion Criteria:

1. Age ≥ 18 years at the time of inclusion;
2. Signed and dated written informed consent in accordance with ICH GCP and local law prior to inclusion in the study;
3. Documented diagnosis of HF (according to Clinical Guidelines "Chronic Heart Failure", 2020, approved by MoH of RF) with typical symptoms/signs of HF consistent with I-IV functional classes of HF according to NYHA classification.

Exclusion Criteria:

1. The absence of signed ICF;
2. The participation in any randomised controlled trial within 3 months before the inclusion in this study or during the participation in this study.

This non-interventional multicenter observational study will include 20,000 adult outpatients with HF who are monitored and treated by cardiologists or internal medicine specialists. In the study, patients will be followed up for about 12 months after being included in approximately 150 clinical centers in Russia. This NIS does not imply any intervention in routine clinical practice, including choice of treatment modality or special methods of investigation. It is planned to include all patients with CHF, who gave their informed consent to participate in the study.

Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal.

All request will be evaluated as per the AZ disclosure commitment:

https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

Yes, indicates that AZ are accepting requests for IPD, but this does not mean all requests will be shared.

AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA Pharma Data Sharing Principles. For details of our timelines, please rerefer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

When a request has been approved AstraZeneca will provide access to the deidentified individual patient-level data in an approved sponsored tool . Signed Data Sharing Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information. Additionally, all users will need to accept the terms and conditions of the SAS MSE to gain access. For additional details, please review the Disclosure Statements at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.