Digital Health Intervention to Promote Lifelong Specialized Care in Adults with Congenital Heart Disease: Study Design

This study describes the theory-driven, community co-design process of the "Empower My Congenital Heart" (EMCH) digital health intervention, which integrates behavioral frameworks and stakeholder input to address barriers to lifelong specialized care for adults with congenital heart disease.

The Gist

Imagine you have a very special, complex engine in your car that you've had since you were born. It works great, but it needs a specific mechanic who knows exactly how your unique engine was built. If you skip visits to this special mechanic, small problems can turn into big, dangerous breakdowns later in life.

This is the reality for Adults with Congenital Heart Disease (ACHD). They have heart defects they were born with, and medical guidelines say they need to see a specialist doctor for the rest of their lives. But here's the problem: 85% of these adults stop seeing their specialist. They get busy, they feel fine, they forget, or they don't know where to go. This "gap in care" leads to emergencies and sadly, premature death.

The doctors and researchers in this paper asked: "How do we fix this without forcing everyone to go to a clinic?"

Their answer is a new digital tool called "Empower My Congenital Heart" (EMCH). Think of it as a smart, friendly GPS for your heart health journey.

Here is how they built it, explained simply:

1. They Didn't Just Guess; They Asked the Drivers

Instead of doctors sitting in a room designing an app in a vacuum, they went to the people actually driving the car.

• The Mechanics (Doctors): They asked, "What stops patients from coming in?"
• The Drivers (Patients): They asked, "Why do you skip appointments? What do you need?"
• The Co-Pilots (Community Advocates): They brought in patient groups to help design the car.

They found out that patients often feel lonely (like they are the only ones with this engine), overwhelmed by too much confusing info, or just forget because life gets busy.

2. The "Behavioral Blueprint" (The Engine Design)

The team used a famous map called the Behavior Change Wheel. Imagine this as a blueprint for how to get someone to do something new. They realized that to get patients to visit their doctor, they needed to fix three things:

• Capability (Can they do it?): Do they understand why they need to go? (The app teaches them in simple language).
• Opportunity (Can they find the way?): Is it easy to book? Do they have their medical info handy? (The app gives them a "Digital Passport" with all their info).
• Motivation (Do they want to do it?): Do they feel scared or hopeful? (The app uses stories from other patients to make them feel brave and connected).

3. What's Inside the "Empower My Congenital Heart" App?

Think of the app as a personal health concierge that lives in your pocket. It doesn't just dump information on you; it guides you gently.

• The "Digital Passport": Imagine a wallet that holds your entire medical history, your doctor's phone number, and your specific heart defect details. You can show this to any doctor, anywhere, instantly. No more digging through old paper files!
• The "Nudge" System: Have you ever forgotten to water a plant? You need a gentle reminder. The app sends you friendly, non-scary reminders (like a text or a notification) to book your appointment. It's like a friend tapping you on the shoulder saying, "Hey, don't forget your check-up!"
• The "Story Circle": This is the most special part. The app shares real stories from other patients. Imagine reading a story from someone who had the same heart defect as you, saying, "I was scared to go to the ER, but here's what I did." This stops the loneliness and makes you feel like part of a team.
• The "Poke": Every couple of months, the app sends a fun, short update or a trivia question. It keeps you engaged without being annoying.

4. Why This is Different

Most health apps are like textbooks: dry, boring, and full of medical jargon.
This app is like a guidebook written by a friend who has been on the same trip.

• It's built for everyone: It works on any phone (iPhone or Android) and uses simple words so anyone can understand, regardless of how much they know about medicine.
• It's scalable: You can't hire a personal nurse for every single patient in the country. But you can give every patient this app. It's a way to bring expert care to people in rural towns or those who are too busy to come to the clinic.

The Bottom Line

The researchers built this tool to be a bridge. It connects the gap between "feeling fine" and "getting the care you need."

They are currently testing it with hundreds of people. If it works, it could save lives by making sure that the "special engine" of every adult with a heart defect gets the tune-ups it needs, keeping them healthy, happy, and alive for a long time.

In short: They turned a scary, complicated medical problem into a manageable, community-supported journey using a simple, smart phone app.

Technical Summary

1. Problem Statement

Adults with Congenital Heart Disease (ACHD) face a critical public health challenge: up to 85% experience gaps in lifelong specialized care, leading to preventable complications, emergent hospitalizations, and premature mortality. While guidelines recommend regular specialist visits, existing interventions are often:

• Clinic-based and resource-intensive: Relying on nurse-led education or transition clinics.
• Limited in scope: Focused primarily on the pediatric-to-adult transition (ages 16–21) rather than the entire adult lifespan.
• Lacking scalability: Difficult to implement broadly due to reimbursement constraints and clinic time limitations.
• Theoretically ungrounded: Many digital tools lack evidence-based behavioral frameworks to drive sustained behavior change.

There is a pressing need for a scalable, accessible, and theoretically robust digital intervention that addresses barriers to care for all adults with CHD, including those lost to follow-up or never transitioned from pediatric care.

2. Methodology

The study employed a Community-Based Participatory Research (CBPR) approach integrated with Behavioral Science frameworks to design the intervention.

• Theoretical Frameworks:
  • Behavior Change Wheel (BCW) & COM-B Model: Used to define the target behavior (completing ACHD specialist appointments) and identify barriers/enablers across three domains: Capability (psychological/physical), Opportunity (physical/social), and Motivation (reflective/automatic).
  • Digital Health Equity & Diffusion of Innovation: Ensured the tool was accessible, readable, and adaptable to diverse populations.
  • Behavioral Economics: Utilized "nudge" principles to facilitate decision-making.
• Data Collection:
  • Semi-structured Interviews: Conducted with 54 participants (37 ACHD patients and 17 clinicians) across the US to identify barriers and patient-centered goals.
  • Community Advisory Board (CAB): 21 members (patients, family, clinicians, advocates from organizations like ACHA and Team Uncle Joe) co-designed the intervention, reviewed findings, and guided branding and feature development.
• Development Process:
  • Iterative design cycles involving CAB consensus, thematic analysis of interview data, and mapping barriers to specific BCW intervention functions (Education, Training, Enablement, Modeling, Persuasion, Environmental Restructuring).
  • Platform: Built on the Eureka Digital Research Platform (UCSF), a HIPAA-compliant, NIH-supported infrastructure compatible with iOS and Android.

3. Key Contributions: The "Empower My Congenital Heart" (EMCH) Tool

The primary contribution is the design and specification of EMCH, a cross-platform digital health intervention. Key technical and design features include:

• Core Intervention Components:
  1. Educational Modules: Concise, actionable content addressing health system navigation and disease knowledge. Features include:
     • Clinician "Empowerment" quotes: Expert guidance on practical issues (e.g., insurance, disability forms).
     • Peer "Empowerment" stories: Patient narratives providing modeling for self-advocacy and reducing isolation.
     • Self-directed personalization: Users can select specific CHD diagnoses (e.g., Tetralogy of Fallot) to view relevant content.
  2. Appointment Planning Nudges: Automated reminders (SMS, email, push) based on behavioral economics to prompt scheduling of specialist visits.
  3. Digital Medical Passport: A centralized, self-reported hub containing diagnosis, device info, provider contacts, and comorbidities. It serves as a portable record for clinicians and links to community resources.
  4. Peer Connections: Curated listings of community events (walks, camps, support groups) to address social isolation. Note: Open forums are excluded to ensure safety and content quality; all peer content is vetted by the CAB.
• Design Philosophy:
  • Tone: Focuses on "well-being" and "empowerment" rather than illness management.
  • Accessibility: Low-bandwidth design, plain language, and mobile-first interface.
  • Engagement Strategy: Activities delivered every 2 months to balance engagement with burden. Includes a unique "Poke" feature (variable-timing notifications) to maintain interest through intermittent reinforcement.
• Security: Data is stored on HIPAA-compliant servers with multi-factor authentication. Participants control data sharing (opt-in for peer stories) and can withdraw/delete data at any time.

4. Results

• Participant Demographics: The study successfully engaged a diverse cohort (37 patients, median age 32; 17 clinicians) representing various regions, races, and care-gap statuses (35% had gaps >3 years).
• Design Objectives Identified: The CAB and interviews highlighted four critical goals:
  1. Providing credible, curated resources.
  2. Uplifting patient voices through storytelling.
  3. Customizing content to individual needs.
  4. Centering positivity and joy.
• Iterative Refinements: The design evolved based on CAB feedback, resulting in:
  • Reducing reminder frequency (from 9 to 3 per module) to minimize intrusiveness.
  • Shifting from colorful icons to flat, minimalist designs for better readability and lower bandwidth.
  • Moving the "Digital Passport" survey to the enrollment phase to maximize early engagement.
• Current Status: The tool launched in September 2024 with over 500 participants enrolled.

5. Significance and Future Directions

• Novelty: This is the first cross-platform digital tool specifically designed using a combined theory-driven (BCW/COM-B) and community co-designed approach for the entire ACHD adult lifespan.
• Scalability & Sustainability: By leveraging the Eureka platform and automated content delivery, EMCH offers a cost-effective solution that can scale to thousands of users without the high marginal costs of clinic-based navigators.
• Clinical Impact: If proven effective in future Randomized Controlled Trials (RCTs), EMCH aims to reduce preventable morbidity and mortality by closing care gaps. It is designed to augment, not replace, clinical care, freeing up provider time for complex cases.
• Next Steps:
  • Conducting process evaluation for acceptability and usability.
  • Developing a Spanish-language adaptation.
  • Executing a full RCT to measure effectiveness on specialist visit completion, self-efficacy, and health outcomes.
  • Exploring integration with Electronic Health Records (EHR) for auto-population of medical data.

Conclusion: The paper presents a rigorous, replicable framework for developing digital health interventions for chronic conditions. By integrating behavioral theory with deep community engagement, EMCH addresses the unique psychosocial and systemic barriers faced by adults with congenital heart disease, offering a promising path toward lifelong, guideline-adherent care.