Telehealth interventions for the secondary prevention of coronary heart disease: a systematic review

Coronary heart disease (CHD) is a leading cause of death globally. Despite proven health benefits and international recommendations, attendance at cardiac rehabilitation programs is poor. Telehealth (phone, Internet, and videoconference communication between patient and health-care provider) has emerged as an innovative way of delivering health interventions. This review aimed to determine telehealth effectiveness in CHD management. Study design includes systematic review with meta-analysis. Randomized controlled trials evaluating telehealth interventions in patients with CHD were identified by searching multiple electronic databases, reference lists, relevant conference lists, gray literature, and key-word searching of the Internet. Studies were selected if they evaluated a telephone, videoconference, or web-based intervention, provided objective measurements of mortality, changes in multiple risk factor levels or quality of life. In total, 11 trials were identified (3145 patients). Telehealth interventions were associated with nonsignificant lower all-cause mortality than controls relative risk=0.70, 95% confidence interval (CI)=0.45-1.1; P=0.12. These interventions showed a significantly lower weighted mean difference (WMD) at medium long-term follow-up than controls for total cholesterol (WMD=0.37 mmol/l, 95% CI=0.19-0.56, P<0.001), systolic blood pressure (WMD=4.69 mmHg, 95% CI=2.91-6.47, P<0.001), and fewer smokers (relative risk = 0.84, 95% CI=0.65-0.98, P = 0.04). Significant favorable changes at follow-up were also found in high-density lipoprotien and low-density lipoprotein. In conclusion, telehealth interventions provide effective risk factor reduction and secondary prevention. Provision of telehealth models could help increase uptake of a formal secondary prevention by those who do not access cardiac rehabilitation and narrow the current evidence-practice gap.