Related Experiment Video
Updated: Jul 13, 2026
In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
Published on: February 16, 2016
Quantitative assessment of microcollateral recruitment during coronary occlusion using real-time intravenous
Fuminobu Ishikura1, Kentaro Otani, Hiroyuki Kayano
1School of Allied Health Sciences, Osaka University, Faculty of Medicine, Osaka, Japan. ishikura@sahs.med.osaka-u.ac.jp
Background:
Residual collateral-derived myocardial blood flow (MBF) (A x beta) is important to protect against myocardial ischemia after acute coronary occlusion.
Methods:
Recruitment of microcollateral was assessed in 22 dogs with left circumflex coronary artery occlusion by analysis of MBF and regional wall thickening (WT) using real-time myocardial contrast echocardiography.
Results:
Video intensity and WT at the center of risk area were significantly lower than those at the border of risk area. The video intensity, A value, beta value, and MBF correlated well with WT after left circumflex coronary artery occlusion. The WT of the area with above 25% of normal MBF was preserved and was higher than that at below 25%. However, the deterioration of WT was not distinguished according to A value.
Conclusion:
Real-time myocardial contrast echocardiography is a useful noninvasive method to evaluate collateral-derived MBF, which can be a reliable index of protection against myocardial ischemia.
Related Concept Videos
01:30Acute Coronary Syndrome III: Diagnostic Studies
01:20Imaging Studies for Cardiovascular System II:Types of Echocardiography
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
01:25Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT