The paper introduces a designing idea and a carrying-out scheme about expanding functions of single channel electrocardiograph in Chinese community medical service and looks forward to its applying prospects.

Design and implementation of an electrocardiograph thermal print system;

Inspection administration and quality assurance of electrocardiograph in hospital;

Electrocardiograph is developing toward 12-Channel synchronization sampling ECG.

There are many reasons for the lead ECG interference.

To adjust paper speed of electrocardiogram machine with the city electrical noise;

Sums up the common malfunctions of 6511 ECG machine and analyzes the malfunction phenomenon and describes their troubleshooting measures according to circuit principle.

Methods To select 32 patients to make experiments on 8 standard ECG machines in the same experimental environment.

So, developing a high performance portable ECG machine is very important for detecting and treating heart problem of people in time.