JMIR Cardio Electronic, mobile, digital health approaches in cardiology and for cardiovascular health. Official partner journal of the European Congress on eCardiology and eHealth Volume 5 (2021), Issue 2 ISSN: 2561-1011 Editor in Chief: Nico Bruining, PhD Contents Original Papers The Effects of Lifestyle Intervention Using the Modified Beliefs, Attitude, Subjective Norms, Enabling Factors Model in Hypertension Management: Quasi-Experimental Study (e20297) Resti Villarino, Christopher Arcay, Maria Temblor, Maureen Villarino, Rosita Bagsit, Lanndon Ocampo, Paquito Bernard. . . . . . . . . . . . . . . . . . . . . . . . 3 User Perceptions and Experiences of a Handheld 12-Lead Electrocardiographic Device in a Clinical Setting: Usability Evaluation (e21186) Kam Wong, Aravinda Thiagalingam, Saurabh Kumar, Simone Marschner, Ritu Kunwar, Jannine Bailey, Cindy Kok, Tim Usherwood, Clara Chow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Moderation of the Stressor-Strain Process in Interns by Heart Rate Variability Measured With a Wearable and Smartphone App: Within-Subject Design Using Continuous Monitoring (e28731) Herman de Vries, Wim Kamphuis, Hilbrand Oldenhuis, Cees van der Schans, Robbert Sanderman. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Validation of Heart Rate Extracted From Wrist-Based Photoplethysmography in the Perioperative Setting: Prospective Observational Study (e27765) Eveline Mestrom, Ruben Deneer, Alberto Bonomi, Jenny Margarito, Jos Gelissen, Reinder Haakma, Hendrikus Korsten, Volkher Scharnhorst, R Bouwman. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 The Effects of a Digital Mental Health Intervention in Adults With Cardiovascular Disease Risk Factors: Analysis of Real-World User Data (e32351) Robert Montgomery, Eliane Boucher, Ryan Honomichl, Tyler Powell, Sharelle Guyton, Samantha Bernecker, Sarah Stoeckl, Acacia Parks. . . 5 5 Patient-Reported Outcomes From Patients With Heart Failure Participating in the Future Patient Telerehabilitation Program: Data From the Intervention Arm of a Randomized Controlled Trial (e26544) Cathrine Skov Schacksen, Anne-Kirstine Dyrvig, Nanna Henneberg, Josefine Dam Gade, Helle Spindler, Jens Refsgaard, Malene Hollingdal, Lars Dittman, Kim Dremstrup, Birthe Dinesen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Clinic Time Required for Remote and In-Person Management of Patients With Cardiac Devices:Time and Motion Workflow Evaluation (e27720) Amber Seiler, Eliana Biundo, Marco Di Bacco, Sarah Rosemas, Emmanuelle Nicolle, David Lanctin, Juliette Hennion, Mirko de Melis, Laura Van Heel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Financial Incentives for Healthy Living for Patients With Cardiac Disease From the Perspective of Health Care Professionals: Interview Study (e27867) David de Buisonjé, Jessica Van der Geer, Mike Keesman, Roos Van der Vaart, Thomas Reijnders, Jobke Wentzel, Hareld Kemps, Roderik Kraaijenhagen, Veronica Janssen, Andrea Evers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 JMIR Cardio 2021 | vol. 5 | iss. 2 | p.1 XSL • FO RenderX