The purpose of this study is to describe the way candesartan is used in heart failure treatment in France (treatment initiation and monitoring), treatment stops occurrence and reasons for and patients clinical evolution

Inclusion Criteria:

• outpatients to whom candesartan has been initiated for less than 30 days or during the consultation to treat heart failure

Exclusion Criteria:

• patients included in a clinical trial the last 30 days before consultation
• patients unable to answer the questions for linguistic or cognitive reasons
• patients who will be difficult to follow during the one year study

Patients seen in outpatient care (private consultation or outpatient hospital consultation) at the baseline visit