Heart Attack Prevention Programme for You (HAPPY) London

Heart Attack Prevention Programme for You London (HAPPY London) will be conducted as a randomised controlled trial comparing the use of tailored e-coaching in addition to the standard of care vs. standard care alone. Standard care is defined as the care that would be offered by the NHS Health Check programme through the NHS primary care. We will use a range of established and novel cardiovascular markers to determine the clinical and cost effectiveness of e-coaching and gain pathophysiological insight into how lifestyle modifications affect the cardiovascular system. These measures include cardiovascular magnetic resonance imaging (CMR), aortic stiffness parameters, vascular ultrasound and other biomarkers of CV disease risk.

Intervention

The HAPPY London web-based tool will provide the participant with an individualised score for their lifestyle and 10 year CV risk score, based on the modified Framingham score and the UK specific QRisk Score, and provide tailored advice and education on the suboptimal factors. Ideal targets will be set and the information will be updated at 3 and 6 months allowing the participant to view their progress. Weekly emails with brief health and lifestyle advice will be sent to encourage healthier behaviour based on clinical studies or topical issues in the media. Links to social networks, such as Facebook posting and the ability to allow chosen 'buddies' from family or friends to view their progress will aim to further encourage healthier behaviour.

The study involves the recruitment of 400 adults between the age of 40 and 74 years who have a moderate to high 10-year CV risk score (Estimated 10 year CV risk >10%). Half of the study group will receive use of the e-coaching in addition to standard care allocated randomly stratified according to either moderate (QRisk between 10 and 20%) or high risk (QRisk more than or equal to 20%). The initial screening will take place on the www.happylondon.info web-based 'mini-check' questionnaire. Potential participants will then be seen at a physical screening visit to confirm eligibility. 3 subsequent visits will take place over 6 months; baseline, 3 month and 6 month follow up. A subgroup of the study population (65 from each intervention arm thus totalling 130 participants ) will also have a baseline and follow up cardiovascular magnetic resonance (CMR) imaging. Assessment will be performed using a variety of measures through questionnaires, blood pressure (BP) checks, blood tests, ultrasound scans, oscillometric method to assess pulse wave velocity and pulse wave analysis and CMR multi-parametric scanning.

The primary aim of this study is to assess the clinical effectiveness of individualised, continuous electronic (e-) coaching to support a healthier lifestyle as a primary prevention tool to reduce the CV risk and improve the quality of life in asymptomatic individuals with intermediate to high 10 year CV risk.

Other questions that we aim to answer are:

• Is computer-tailored e-coaching cost-effective in the short-term (clinical trial period) and during the long-term (decision analysis modelling)
• What are the associations of personality traits, economic preferences, and sociocultural factors with the achieved lifestyle modifications and changes in the cardiovascular phenotype?
• What is the relationship between changes observed in markers derived from our multi-parametric cardiovascular magnetic resonance imaging protocols following lifestyle changes?
• How frequent are silent myocardial infarctions in a typical NHS Health Check population?
• Do treatment effects differ between ethnic groups?

Inclusion criteria

• Subjects will be enrolled following an informed consent. The subject will be able to understand and comply with protocol requirements, instructions and protocol-stated restrictions
• Subjects will be between 40 and 74 years of age
• Subjects will have unrestricted access to the Internet
• Subjects will be sufficiently fluent in English language.
• Subjects will have an estimated intermediate to high risk for CV events based on the web-based pre-screening tool (www.happylondon.info), which is based on the nonlaboratory Framingham risk score (>10% 10 year cardiovascular risk)

Exclusion criteria

• History of stroke or transient ischaemic attack (TIA)
• Cardiac sounding chest pain requiring further investigations
• Current life threatening conditions other than vascular disease (e.g. very severe chronic airways disease, HIV positive, life-threatening arrhythmias) that may prevent a subject from completing the study
• Only for subgroup undergoing cardiac contrast-enhanced magnetic resonance studies: Any contraindication to a contrast-enhanced magnetic resonance study, such as known allergies to gadolinium-based contrast agents, severe claustrophobia, pacemakers, defibrillators, etc