Intervention in health prevention and treatment via mobile phones is becoming a key element on health promotion. Testing the efficacy of these mobile health (mHealth) psychological interventions for cardiovascular health is necessary as it is a chronic pathology, and it can influence the affective and cognitive states of patients. This research aimed to analyze the effectiveness of two brief psychological interventions-mindfulness and positive strengthening-to promote subjective emotional wellbeing and disease management self-efficacy using mHealth. This was a three-arm intervention and feasibility study, with a pre-post design and three follow-up measures with 105 patients (93 completed all phases) with cardiovascular diseases. Group 1 and 2 received the mindfulness or strengthening intervention, and Group 3 was the control group. The positive-negative affect and management self-efficacy for chronic and cardiovascular diseases were analyzed over time, while anxiety and depression levels were assessed at the beginning of the study. The results showed that mindfulness and positive strengthening interventions both had a positive effect on participants' affective state and management self-efficacy for the disease in comparison with the control group over time, even after controlling for baseline anxiety and depression levels. Positive strengthening seems to be more effective for improving cardiac self-efficacy, while mindfulness practice was significantly more effective at reducing negative affect at the first face-to-face evaluation.
Keywords: cardiovascular disease; cardiovascular management self-efficacy; intervention; mindfulness; positive and negative wellbeing; positive strengthening.