In recent years

noninvasive myocardial work has gradually developed into a new technology to evaluate myocardial systolic function. It mainly relies on two-dimensional speckle tracking echocardiography and left ventricular pressure changes to construct left ventricular pressure-strain loop. The technique overcomes the limitations of speckle tracking echocardiography

quantifies the afterload

effectively overcomes the load dependence

and better objectively evaluates the myocardial function. It has a wide application and development prospect for clinical diagnosis of cardiovascular diseases and evaluation of the prognosis of cardiovascular diseases.