This randomized controlled trial compares a home telemonitoring system (HTS) versus usual care during a 90 days follow-up of Heart Failure (HF) ambulatory patients, in order to evaluate if the use of the HTS improves self-care and treatment adherence. The study was reviewed and approved by the Methodological Committee and by the Research Ethics Committee from the Provincial Health System, according to the Declaration of Helsinki. Written informed consent was obtained before randomization.

Inclusion Criteria:

• were over 18 years with a primary diagnosis of HF,
• had been hospitalized at least once time as a consequence of a HF decompensation,
• had a Smartphone,
• had access to WiFi,
• had access to a weight scale and to a blood-pressure monitor

Exclusion Criteria:

• illiterate patients,
• had learning difficulties,
• had a cognitive impairment sufficient to interfere with the use of the telemonitoring system, or had a severe depression that could interfere with their quality of life perception.