Table 3.

The My Plan section design and rationale.

Subsection	Item	Rationale
Symptoms	Infographic of common signs and symptoms; help seeking information; understanding deterioration information	Patients reported frequent, varied symptoms. Some were frustrated by multiple, interacting, and complex symptoms or lacked understanding of the treatment rationale in lessening symptom burden; the design brief highlighted the importance of addressing symptom management challenges; the co-design team wanted information and self-help which is visual and simple; source of the infographic was the St Vincent’s Heart Health website [22]; when deciding on the content for the information and advice pages, HFa patient information booklets [23,24], the St Vincent’s Heart Health website [22] and the chronic HF action plan [24] were referred to.
Medications	Medication, previous medications, and allergy list; medicine information; diuretic plan	Clinicians believed medication management should be better supported; patients reported challenges with managing their medications with caregivers often involved; medication information was an important design feature, with specific insights and expertise provided by the pharmacist; the team referred to HF medicine information in patient education booklets [23-25] which includes a medication list template [23], reviewed information on the National Prescriber Scheme Medicine Wise website [26] and the flexible diuretic regime in the hospital’s HF discharge checklist [21].
Fluid	Visual representation of jug at volume of fluid restriction; user enters oral fluid intake throughout the day	Patients experienced challenges with maintaining fluid restrictions; the co-design team wanted tracking with feedback and an interactive interface; fluid-related HF information and advice [24,25,27], local guidelines [22,27], tools and guidelines for documenting fluid intake [23,25,27] and previous qualitative research on fluid restriction adherence [28] were referred to when deciding on content.
Diet	Healthy eating; low salt (sodium) eating including label reading and foods to avoid	Patients wanted general information only; caregivers often prepare meals; specific insights and expertise were provided from the clinical dietitian on the co-design team; information and advice on healthy eating including reducing salt [23-25,29], the healthy eating section of the Heart Foundation website [30] were referred to during the design.
Weight	Record daily weight with 7-day graph; interactive, color-coded feedback and pop up alerts	Patients may not be accurate or remember their daily weight; clinicians wanted to include or track HF-related data in an interactive, visual, and tailored format; the cardiac nurse consultant mainly designed the feedback system; information on fluid retention including documenting daily weight and guidelines for help seeking were referred to [23-25,27].
Blood pressure (BP) and Pulse	Record and store BP and pulse measurements	A patient suggested this subsection and the cardiologist supported its inclusion; patient booklets supported intermittent documentation of BP [23,25] and a recent BP and pulse is included in the hospital’s HF discharge checklist [21].
My Future	Information and prompts to decide on a plan, discuss this with others, speak to your doctor, and plan what happens to your defibrillator	Clinicians suggested the inclusion of information on advance care planning; the team referred to the local advance care planning website [31] and palliative care recommendations [7].
Well-being	Interactive depression screening tool; at risk or low risk results screen	This subsection was suggested by a patient; patients frequently reported anxiety and worry; emotional support was a priority function; the team reviewed the local depression screen tool (Patient Health Questionnaire-2, PHQ-2 score) in use at the hospital [32,33] and reviewed psychological care recommendations for HF [7].
Exercise	Step counter with 7-day graph; 3× exercise videos demonstrated by physiotherapist (balance, upper limb, and lower limb) with 7-day graph	Patients reported using their smartphone’s step counter, appreciated supervised physical exercise, and set their own exercise goals; clinicians wanted to include or track data; the physiotherapist designed the exercise program, using the Otago exercise program [34] as a guide.

^aHF: Heart failure.