Background: Three quarters of all cardiovascular disease-related deaths occur in low- to middle- income countries. In addition, there are more than 1 billion people worldwide at risk of a serious cardiovascular event due to high blood pressure, high serum cholesterol levels and/or diabetes. In Latin America, hypertensive-related heart disease is among the top ten causes of death. Inadequacies in health care service access and treatment quality along with high rates of poverty, only work to exacerbate the problem.
Objectives/Aims: Based on prior study and other previous projects conducted in Santa Cruz de Yojoa, the purpose of the study is to evaluate the short-term feasibility and impact of an automated phone system in monitoring and improving hypertension among patients from semi-rural communities in Mexico and Honduras. The specific aims are: (1) to evaluate the feasibility (acceptability and usage rates) of a program including weekly disease assessment calls that include self-management suggestions and support among patients with hypertension; (2) to evaluate the program's impact on patients' blood pressure levels and other secondary outcomes; and (3) to discuss with local clinical, community, and health policy leaders the potential for expansion of this telemedicine program to other underdeveloped regions throughout the world and as well as its possible efficacy for other chronic diseases beyond cardiovascular diseases.
Methods: Adult hypertensive patients who receive care from participating clinics affiliated with Yojoa International Medical Center in Santa Cruz de Yojoa, Honduras and the Diabetes Center clinics in Pachuca and Real del Monte, Mexico, will be recruited for this study. 200 patients (100 from each clinic site), including adult men and women (up to 100 from each clinic) between the ages of 18 and 80 who have high blood pressure and who see their primary care doctor at one of the participating clinics will be screened and enrolled in this program. The patient may choose to enroll with a family member or friend (a "Care Partner") for disease management support throughout the study. Blood pressure will be taken by researchers at baseline, and at the six-week follow-up.
Participants will be randomized to receive written information about blood pressure control versus weekly automated telephone assessment and behavior change calls focused on blood pressure management. The intervention group will receive a weekly 10-minute automated phone call to their cell phone for disease assessment and self-care support for 6 weeks. Intervention patients also will be provided with in-home cuffs for measurement of blood pressure throughout the study. During patients' automated calls, they will be asked questions about their hypertension, medication, and self-care. Based on the patient's self-report, they will receive targeted suggestions for how to improve their hypertension self- care. The intervention patient's CarePartner (if applicable) will receive a weekly update via automated phone call or email, which will give that informal caregiver a summary of the enrolled patient's health and provide him/her with suggestions for addressing the needs of the patient and supporting the patient's self-care.
Urgent alerts for patients with critical health problems will be provided, via email, to the research team plus the clinic so that follow-up with a clinician can take place. The intervention will last six weeks, after which the patient will have a follow-up visit with the research team and will complete a survey about the program. The control group will be enrolled just as the intervention group; however, the control group will not receive automated phone calls or a blood pressure monitor over the six-week study period.
