for people ages 18 years and up (full criteria)
at Walnut Creek, California and other locations
study started
estimated completion:
Linda Park



The purpose of this study is to determine whether using a mobile app increases adherence to a heart healthy prescription after discharge from a cardiac rehab program.

Official Title

A Technology-Based Adaptive Intervention to Promote Cardiovascular Health After Completion of Cardiac Rehabilitation (Mobile4Heart)


Ongoing maintenance of physical activity after cardiac rehab is an important part of preventing secondary cardiac events in patients with ischemic heart disease. Our central hypothesis is that monitoring and promotion of health-related behaviors by increasing patient-provider communication through a mobile device after discharge from cardiac rehab increased adherence to a heart healthy prescription over time. Participants will be randomly assigned to use a mobile app or serve as the control group. All participants will have an activity tracker to track their activity for two months.


Ischemic Heart Disease Unstable Angina Systolic Heart Failure Cardiovascular Diseases Heart Failure Heart Diseases Myocardial Ischemia Coronary Artery Disease Angina, Unstable Heart Failure, Systolic Movn Mobile App


You can join if…

Open to people ages 18 years and up

  • At least 18 years of age
  • History of cardiovascular disease that qualified patient for cardiac rehab (i.e.ischemic heart disease, history of unstable angina, systolic heart failure with ejection fraction at 35% or less, and Class II to IV symptoms, coronary artery bypass graft surgery, valve replacement)
  • Own a smartphone or tablet

You CAN'T join if...

  • Cognitive impairment
  • Lack of English proficiency/literacy
  • Clinical conditions including: unstable arrhythmias, aortic stenosis,thrombophlebitis, dissecting aneurysm, symptomatic anemia, active infection,uncontrolled hypertension (resting diastolic > 100 mmHg, systolic > 180 mmHg),decompensated heart failure NYHA class 3-4, current unstable angina, 2nd or 3rd degree heart block, or uncontrolled high grade exercise-induced ventricular ectopy


  • John Muir Medical Center accepting new patients
    Walnut Creek California 94958 United States
  • John Muir Medical Center accepting new patients
    Concord California 94520 United States

Lead Scientist

  • Linda Park
    Dr. Park's program of research focuses on the secondary prevention of cardiovascular disease. Her current research projects center around determining the most engaging, practical, and meaningful technology-based interventions to improve patient self-care, clinical outcomes, and quality of life for patients with ischemic heart disease and heart failure.


accepting new patients
Start Date
Completion Date
University of California, San Francisco
Study Type
Last Updated