Usefulness of Real-Time Myocardial Perfusion Imaging to Evaluate Alterations of Myocardial Blood Flow in Patients With Stable Angina Pectoris Undergoing Elective Percutaneous Coronary Interventions

摘要: Release of cardiac enzymes has been reported in patients with stable angina who undergo elective percutaneous coronary intervention (PCI) and associated adverse clinical outcomes. The aim the present study was to investigate whether impaired microvascular integrity can be detected using myocardial contrast echocardiography undergoing PCI, it is related extent postprocedural troponin T elevation. We investigated consecutive (n = 19) were scheduled for angioplasty stent placement. Myocardial performed before 2 4 hours 24 after intervention. Contrast images analyzed visually quantitatively measuring peak signal intensity (A) slope rise (β) 16 segments. product A × β calculated each segment estimate regional blood flow. Troponin collected serially PCI. Five (26%) had elevated PCI (range 0.03 0.46 μg/L). Eight (42%), including all 5 levels, demonstrated ≥2 segments 4) within perfusion territory target vessel. Of 11 without evidence by echocardiography, none levels at follow-up. Quantitative analysis flow showed that partially reversible. Thus, decreased significantly (3.4 ± 1.6 vs 8.8 3.4 dB/s baseline, p 0.80,