Mattress for measuring physiological parameters of heart

A mattress for measuring physiological parameters of a heart, comprising

• a mattress body, a first electrode, a second electrode and an electromagnetic shield, wherein the first electrode and the second electrode are located on an upper surface of the mattress body, and the first electrode and the second electrode have a space therebetween, the first electrode is configured to be placed on an upper position of the heart and the second electrode is configured to be placed on a lower position of the heart, wherein
• the first and second electrodes have a width between 9-12 cm and a length from 60-85 cm and a distance between the first and second electrodes is between 13-20 cm;
• the electromagnetic shield, the first electrode and the second electrode comprise a conductive fabric, having a thickness of 1-1.8 mm;
• at least a portion of the electromagnetic shield is located on a lower surface of the mattress body and is insulated from the first electrode and the second electrode.