Introduced in 1989, the myocardial doppler tissue imaging has now many clinical applications. Doppler tissue imaging explores the proper systolic and diastolic regional function of myocardial fibers. We can measure myocardial velocities by recording signals of low velocitiy and high magnitude, the strain and the strain rate are then derived from velocities. Specific software is therefore necessary. There are many ways of recording and representing myocardial doppler tissue parameters. Diagnostic and prognostic value of myocardial doppler tissue imaging is now proved and this method has many applications in ischemic cardiopathy and in cardiomyopathies. The development of powerful software is promising for the applications of the strain in the future.