An ECG caliper is a tool that helps measure certain values. It usually has no measuring ability of its own, but allows setting its width and then measuring it against a more convenient portion of the ECG paper.  It is a general tool that can be used for many different things. 

ECG data management system centralizes diagnostic ECG data to provide instant electronic access to this information at any time or from any location. By automating and streamlining the storage, editing, retrieval and sharing of patient cardiology data including resting ECGs, stress tests, holter tests, and 12-lead ECGs from bedside monitors. It helps to increase workplace productivity and efficiency within hospitals and physician offices to provide enhanced patient care.

An electrical signal is a potential difference detected between two points. In the ECG, signals are recorded between two active surface electrodes or an active electrode and a common or indifferent point. Each signal recorded is called a lead and may have amplitude of several millivolts.

ECG machine is used for a resting ECG and a real time ECG recording with or without arrhythmia detection. It is designed as a portable device and can be moved from one patient to another or to different locations. It supports a 12 lead, 6 lead and arrythmia mode. The graphic display shows 3 leads at a time. Patient and user data can be entered for reliable archiving of patient records.

Phonocardiogram software is designed to record, condition, display, and print heart sounds recorded through an electronic stethoscope. It acquires and displays the recorded signals at each of up to four sites, and allows user-selectable filtering of each site independently using low, medium and high-pass filters. It is compatible with various electronic stethoscopes.

The ECG monitor is a microprocessor-controlled unit that allows the surgeon to observe the patients cardiac electrical activity. Each R of the ECG sends a trigger pulse to the laser. The combination of a depressed footswitch on the laser unit and a trigger pulse from the ECG monitor produces a burst of pulsed energy.

The ECG paper is specially designed graph paper. It is coated with a thin covering of plastic, which melts when the heated stylus runs across it. The stylus is heated in order to melt the plastic on the ECG paper and produce an ECG tracing.