Comparison of four smartphone compatible blood pressure monitors

Out-of-office blood pressure (BP) monitoring is advocated by the guidelines for various reasons. Recently developed smartphone compatible BP monitors are potentially very useful for out-of-office BP monitoring. This study is ought to compare performances of these BP monitors. Patients with recent myocardial infarction and no documented history of atrial fibrillation or atrial flutter were eligible for our study. After inclusion, six BP monitors from different manufacturers were applied to the patient. Three consecutive measurements were done with each BP monitor. Means were statistically analysed using a linear mixed model with Bonferonni to correct for multiple comparisons. A total of 33 patients were included. Compared to the reference device, one BP monitor yielded a significant higher mean systolic BP and three monitors yielded a significant higher diastolic BP. One validated smart phone compatible device yielded no systematic diference in means of systolic and diastolic BP. One device yielded systematic diference in means of systolic and diastolic BP. Further research will be done to corroborate these findings.