<?xml version="1.0" encoding="UTF-8"?><protocol_summary><protocol><id>3642</id><no>CONNECT-HF-NCT03035474</no><status>Open</status><title>CARE OPTIMIZATION THROUGH PATIENT AND HOSPITAL ENGAGEMENT CLINICAL TRIAL FOR HEART FAILURE CONNECT-HF</title><objective>CONNECT-HF is a large-scale, pragmatic, cluster-randomized clinical trial to evaluate the effect of a customized, multifaceted, health system-level quality-improvement (QI) program compared with usual care on heart failure (HF) outcomes and HF quality-of-care metrics.</objective><secondary_protocol_no>CLCZ696BUS05T</secondary_protocol_no><nct_id>NCT03035474</nct_id><sponsor_type>Externally Peer-Reviewed</sponsor_type><age_group>Adult</age_group><treatment_type>Observational</treatment_type><treatment>Other: Digital Engagement; Other: Direct Engagement</treatment><phase>N/A</phase><scope>National</scope><disease_site>Diseases Of The Circulatory System</disease_site><lay_description>Relevant Conditions/ Diseases: Heart Failure</lay_description><PI>Ryzhikov, Alex</PI><institution>Medstar Southern Maryland Hospital Center</institution><management_group>MCRN - Southern Maryland</management_group></protocol><sipVersion>2026.1.0 Build 16</sipVersion><copyright> &lt;a href="https://advarra.com" target="_blank"&gt;&amp;copy; 2026 Advarra, Inc.&lt;/a&gt; </copyright></protocol_summary>