An electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical voltage in the heart in the form of a continuous strip graph. It is the prime tool in cardiac electrophysiology, and has a prime function in screening and diagnosis of cardiovascular diseases.

• ECG
• I-CubeX BioBeat heart signal sensor
• Using an ECG with Dr.DAQ - This Article has a feasable circuit for use in reading the heart rhythm as an analog signal. WARNING!: Pay attention to the safety issues on the site. The circuit needs to be reworked for it to be completely isolated from dangerous shock voltages.