Optimizing electrode positioning in 3-lead ECG chest devices

Although the 12-lead electrocardiogram has become an essential medical and research tool, many current and envisaged applications would benefit from simpler devices, using 3-lead ECG configuration. This is particularly true for Ambient Assisted Living (in a broad perspective). However, the chest anatomy of female patients, namely during pregnancy, can hamper the adequate placement of a 3-lead ECG device and, very often, electrodes are placed below the chest rather than at the precise thoracic landmarks. Thus, the aim of this study was to compare the effect of electrode positioning on the ECG signal of pregnant women and provide guidelines for device development. The effect of breast tissue on the ECG signal was investigated by relating breast size with the signal-to-noise ratio, root mean square and R-wave amplitude. Results show that the 3-lead ECG should be placed on the breast rather than under the breast and indicate positive correlation between breast size and signal-to-noise ratio.

PÁSCOA, CRUZADOS E GENOCÍDIOS (M/18)

“Acredita-se que mais de cem milhões de cristãos enfrentam perseguições diariamente em todo o mundo por causa da sua fé em Jesus Cristo”, Eric Metaxas, “comparou a atitude da maior parte das lideranças cristãs com o silêncio dos cristão no tempo da Alemanha nazi”, Metaxas escreveu uma biografia de Dietrich Bonhoeffer, torturado e morto pelos nazis – 1906/45, foi um teólogo pastor luterano e membro da resistência anti-nazi, tendo estado envolvido com o Almirante Canaris da Abwehr para assassinar Hitler. Bonhoeffer, que foi um crítico das perseguições aos judeus, tinha por lema: “O silêncio diante do mal é o próprio mal”. § "It is believed that over one hundred million Christians face persecution every day around the world because of their faith in Jesus Christ," Eric Metaxas, "compared the attitude of most Christian leaders with Christian of silence in the German time Nazi, "Metaxas wrote a biography of Dietrich Bonhoeffer, tortured and killed by the Nazis - 1906/45, was a pastor Lutheran theologian and member of the anti-Nazi resistance, having been involved with Admiral Canaris of the Abwehr to assassinate Hitler. Bonhoeffer, who was a critic of the persecution of Jews, had a motto: "Silence in the face of evil is evil itself."