The Clinical Decision Support Systems (CDSS) based on real clinical data and its own algorithms can help to make the right choice according to guidelines. The goal of the INTELLECT II study is to investigate treatment adherence to guidelines/science-based medicine and its impact on patient outcomes into two groups of doctors, clinical centers with standard care of treatment (control), and clinical centers using CDSS (active).

Hypertension and atrial fibrillation are 2 important public health priorities. There is a gap between evidence-based best management and actual clinical practice. To decrease this gap, clinical practice guidelines (CPGs), based on available evidence are employed. Clinical decision support system ("MedicBK") is a computer-based program that analyzes published evidence and provides prompts and reminders to assist health care providers in implementing clinical guidelines and science-based medicine at the point of care. The INTELLECT II trial is designed as a multicenter, cluster-randomized, single-blind, controlled study with blinded outcome assessment. Approximately 10 centers from Russia will be enrolled. Centers managing patients with symptomatic atrial fibrillation and/or hypertension will be randomized to either patient management with aid of CDSS ("MedicBK") or standard care.

Inclusion Criteria:

• Age > 18 years old
• Patients diagnosed with nonvalvular atrial fibrillation and hypertension and indications for therapy according to European guidelines.

Exclusion Criteria:

• Inability to adhere to study procedures
• Severe heart-valve disorder
• Stroke within 14 days or severe stroke within 6 months before screening
• Active bleedings
• Thyroid dysfunction
• Pregnancy
• Secondary hypertension