ABC | Volume 111, Nº2, August 2018

Original Article Sampaio et al Monitoring of rhythm, atrial fibrillation and stroke Arq Bras Cardiol. 2018; 111(2):122-131 Figure 1 – Conceptual diagram of PoIP – as can be seen in the diagram, PoIP uses the concept of real-time transmission of the data by the EDGE technology. Wireless data transmission is performed by standard protocol to internet access in mobile devices by GPRS-EDGE – Generic Packet Radio Service, commonly known as 2.5G PoIP web portal Requisition 2G+GPRS (2.5G) Requisition WEB Transmission and connection Protocol of medical data transmission Data consultation Data recording Database PoIP Data Figure 2 – Flowchart depicting selection of the study groups 96 patients 66 stroke and 26 controls 2 deaths before monitoring was initiated 4 stroke patients at the ICU 2 refused prolonged monitoring 58 stroke + 26 controls Propensity score Cohort with 52 patients 26 stroke 26 controls The most frequent comorbidities were arterial hypertension (84.6%) and diabetes mellitus (51.9%). Among control patients, a significantly higher (p = 0.03) proportion of smokers was found in stroke patients aged 65 years or older (p = 0.04). No other difference was found between the groups (Table 1). Complementary tests Echocardiography: the only statistically significant difference between the groups was a lower (although within normal range) ejection fraction (p = 0.04) values in the stroke/ TIA group. Clinical analysis : the only statistically significant difference was found in free T4 (p = 0.03), which was higher in stroke/TIA, but also within the normal range. No other difference was found between the groups. Data transmission analysis Mean recording period was 23.5 ± 0.6 hours by Holter monitoring and 148.8 ± 20.8 hours by PoIP, with no significant 124