| Objective: To quantitatively evaluate myocardial perfusion after percutaneous coronary intervention (PCI) and stent implantation in patients with coronary heart disease by Doppler tissue imaging (DTI). Methods: Forty five patients who underwent PCI with stent implantation divided into two groups according to electrocardiogram and history: non myocardial infarction group (20 cases) and myocardial infarction group (25 cases). DTI was used to detect the motion of the corresponding segments of stent positioned vessel and mitral valve annulus. We measured the velocity of systolic wave (Vs), early diastolic wave (Ve), atrial contractive wave (Va), Ve/Va and acceleration and deceleration time of E (EAT and EDT) in every segment. We observed the DTI changed indices of Pre-PCI, Post-PCI after 3 days, 1 month and 3 months. Results: (1)Global cardiac systolic and diastolic function: Vs, Ve and Ve/Va of mitral valve annulus were increased and EDT was decreased in the two groups after PCI (p<0.05). Compared with Pre-PCI, Ve/Va of mitral valve annulus had a significant increase in Post-PCI after 3 days and Vs had a correlation with ejection fraction(EF) (r=0.656, P = 0.021). (2)Regional cardiac systolic and diastolic function: compared with Pre-PCI, Vs, Ve and Ve/Va were increased, EDT and EAT were decreased respectively in non myocardial infarction group 1 month and myocardial infarction group 3 months after PCI. Conclusions: Ve/Va of mitral valve annulus is an early index to reflect cardiac global perfusion condition after PCI, and Vs of mitral valve annulus is a useful index toevaluate cardiac global systolic function. The regional and global myocardial perfusion recovery times had their own different characteristics in non myocardial infarction and myocardial infarction patients after PCI stent implanted.
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