A sensor, such as an antenna, detects an electrical sinoatrial signal produced by the human heart. A spectrum analyzer then processes the electrical sinoatrial signal to generate a frequency spectrum comprising a plurality of frequency components associated with different organs. A diagnostic unit then analyzes the frequency spectrum and compares the frequency spectrum to a standardized normal spectrum to determine the condition of the organs. In particular, the amplitude and the bandwidth of the frequency components may be compared to the standardized normal spectrum. The system monitors the relationship between the electromagnetic energy of the heart, organs, limbs, and the brain.