The recent effect observation of 99Tcm-MIBI myocardial perfusion imaging in coronary heart disease patients with percutaneous coronary intervention

Objective To explore the recent effect of 99Tcm-methoxyisobutylisonitrile myocardial perfusion imaging (99Tcm -MIBI) in coronary heart disease (CHD) patients with percutaneous coronary intervention (PCI). Methods From October 2014 to March 2017, a total of 124 patients [including 68 males and 56 females, aged 43~79 (61.89±17.21)] with CHD undergoing PCI in Fuling central hospital were used as research objects and underwent adenosine-loading myocardial perfusion imaging (99Tcm -MIBI-SMPI) and 99Tcm MIBI rest myocardial perfusion imaging (99Tcm-MIBI-RMPI) within 3 days before PCI and 99Tcm-MIBI-SMPI within 3 days after PCI. All patients were followed up for 1 year via telephone calls. According to complete improvement, partial improvement and no improvement of ischemia, they were divided into three groups. The cases of general cardiovascular events and serious cardiovascular events were calculated. Student-t test was used to compare the measurement data between the two groups, and χ2 test was used to compare the count data. Results In the 124 patients, 99Tcm-MIBI-SMPI examination before PCI showed 272 reversible defect sections and 360 irreversible defect sections. The summed stress score was 1598 points. 99Tcm-MIBI-SMPI examination after PCI showed 25 reversible defect sections, 247 sections (247/272=90.81%) improved, 198 irreversible defect sections, and 162 sections (162/360=45.00%) improved. The summed stress score was 636 points. After PCI, the left ventricular ejection fraction, end diastolic velocity, and end systolic volume of patients showed significant improvement. The differences were statistically significant (t=−7.450, 4.304, 12.144, all P<0.01). Postoperative 99Tcm MIBI-SMPI indicated the completely improved, improved, and partly improved status of the three groups of ischemia patients, and the improvement showed an significantly increased trend in both half year and 1 year total incidence of cardiovascular events (χ2=142.668, 106.225, both P<0.05). Conclusion 99Tcm-MIBI has good effect on CHD patients with PCI and on their long-term prognosis. Key words: Myocardial perfusion imaging; Coronary angiography; Percutaneous coronary intervention