Table 4.

Thematic synthesis based on the type of technology.

Key Themes	References
Asynchronous: SMS text messaging, Tablet-based Decision Support and Integrated Record keeping (DESIRE) tool (mobile health), mobile health app, smartphone, patient-texted system, SMS and IVR messages, internet-based health management, mobile health clinic, mobile health, clinical decision support system, clinical decision support system, web conference	Cottrell et al. [17], Barsky et al. [47], Vedanthan et al. [49], Dos et al. [50], Buis et al. [51], Parke et al. [53], Ma et al. [55], Chen et al. [59], Jindal et al. [60], Doocy et al. [61], Leon et al. [62], Buis et al. [63], Ju et al. [64], Manusov et al. [66], Marcolino et al. [68], Peters et al. [69], Debon et al. [70], Davoudi et al. [71], Kassavou et al. [75], Cottrell et al. [76], Nau et al. [78], Grant et al. [84], Saleh et al. [85], Vitório et al. [86]
Synchronous: Virtual visit, teleconsultation online, interactive voice response (IVR), Home and Online Management and Evaluation of Blood Pressure, web-based system, telemedicine visit, telephone, app with decision support system	Naqvi et al. [48], Levine et al. [56], Ashjian et al. [57], McManus et al. [72], Andersson et al. [74], Ye et al. [79], Cimini et al. [82], Shaw et al. [83]
Remote patient monitoring: Blood Pressure Remote Patient Monitoring (RPM), monitoring hypertension, telemonitoring, home BP telemonitoring system	Koopman et al. [52], Fisher et al. [54], De Luca et al. [58], Lee et al. [67], Chew et al. [73], Abdullah et al. [77], Calderón et al. [80], Sin et al. [81], Teo et al. [87]