Exercise Echocardiography on LV Mechanics in Patients With CAD: a Speckle-tracking Echocardiography

Using Exercise Echocardiography to Investigate the Effects of Different Exercise Trainings on Left Ventricular Mechanics in Patients With Coronary Artery Disease: a Speckle-tracking Echocardiography

Recovering blood flow to a coronary stenosis may improve left ventricular (LV) function in patients with coronary artery disease (CAD). However, the reported data about evaluation of LV function post-percutaneous coronary intervention (PCI) in CAD was limited. The aim of this study was to compare the LV function measured by 3 min low dose exercise stress echocardiography (ESE) combined 2D speckle tracking echocardiography (STE) in patients with CAD underwent PCI, and to identify factors affecting the change of LV function. Patients with CAD who underwent acute PCI were enrolled.

The assessment of temporal changes in systolic and diastolic regional left ventricle function by 2D-STE after successful reperfusion therapy of acute myocardial infarction (AMI).The estimated total number of participants is 90 patients with AMI and treated with successful percutaneous coronary intervention were included in this study. The echocardiographic measurements were performed in all patients within in-hotpital after PCI procedure, and then followed up at 7, 14, 30, 60 and 180 days after discharge. Recovery of regional systolic and diastolic myocardial function after acute myocardial infarction evaluated by ESE-STE.

Inclusion Criteria:

• acute myocardial infarction diagnosed by a physician
• undergoing percutaneous coronary intervention
• Exercise testing and stress echocardiography are performed with the approval of the physician.

Exclusion Criteria:

• Severe cardiac valve disease
• Left bundle branch block
• Uncontrolled diabetes or hypertension
• Orthopedics or other conditions that hinder from exercise
• Uncontrolled sinus tachycardia (greater than 120 beats per minute)