In vivo determination of acute myocardial ischemia based on photoacoustic imaging with a focused transducer

2011 ◽  
Vol 16 (7) ◽  
pp. 076011 ◽  
Author(s):  
Zhifang Li ◽  
Hui Li ◽  
Haiyu Chen ◽  
Wengming Xie
Keyword(s):  
Myocardial Ischemia ◽  
Photoacoustic Imaging ◽  
Acute Myocardial Ischemia

In Vivo MRI Visualization of Acute Myocardial Ischemia and Reperfusion in Ferrets by the Persistent Action of the Contrast Agent Gd(BME-DTTA)

Circulation ◽  
1995 ◽  
Vol 92 (12) ◽  
pp. 3549-3559 ◽  
Author(s):  
Tamás Simor ◽  
Wen-Jang Chu ◽  
Lynne Johnson ◽  
Andras Safranko ◽  
Mark Doyle ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Contrast Agent ◽  
Acute Myocardial Ischemia ◽  
Ischemia And Reperfusion ◽  
Myocardial Ischemia And Reperfusion

Study on the Effects of Kuanxiong Aerosol on the Isolated Artery and Rabbits Acute Myocardial Ischemia Model

2021 ◽  
Vol 24 ◽  
Author(s):  
Xia Liu ◽  
Feihua Huang ◽  
Xiao Lu ◽  
Yuji Wang ◽  
Tingting Cai ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Troponin T ◽  
Pharmacological Study ◽  
Acute Myocardial Ischemia ◽  
Chinese Herbal Compound ◽  
Long Acting ◽  
Traditional Chinese Medicine Preparation ◽  
T Waves

Background: Kuan xiong aerosol (KXA) is a kind of Chinese herbal compound used to regulating qi-flowing for relieving pain and improving angina. However, little pharmacological study of this traditional Chinese medicine preparation has been reported to confirm these activities. Objective: This article aims to observe the effect of resisting acute myocardial ischemia (AMI) in vivo and dilating vessel in vitro of KXA. Materials: The AMI model involves intravenously injecting pituitary (2 U.kg-1) into the ear of rabbits. Electrocardiograph (ECG) T waves were then recorded after administration and the falling range was calculated. Following this, the level of serum Cardiac troponin T (cTn-T) and the histopathology of the cardiac muscle tissue was evaluated. In vitro, the effect of KXA on vasodilation of isolated aortic rings that had been pre-contracted with KCl (30 mM) was observed. Results: It was found KXA reduced ECG ST-T waves and serum cTn-T in the rabbit AMI model, protected myocardial tissue from fracturing and loss of myocardial fibers, and inhibited inflammatory cell infiltration, cavitation degeneration and karyopyknosis of the myocardial matrix. Furthermore, the administration of 0.215, 1.075 and 2.150 mg.mL-1 KXA resulted in significant relaxation of the aortic rings at a rate of 69.63 %, 90.14 % and 118.72 % (p < 0.01) of the untreated ones, and a second shrinkage ratio of 20.17 %, 4.29 %, and 4.54 % (p < 0.01) of the untreated ones, respectively. Conclusions: these results suggest KXA protects against AMI, contributes to dilation of blood vessels and has long-acting effectiveness.

scholarly journals Metabolic alterations in acute myocardial ischemia-reperfusion injury and necrosis using in vivo hyperpolarized [1-13C] pyruvate MR spectroscopy

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Chung-Man Moon ◽  
Yun-Hyeon Kim ◽  
Young-Keun Ahn ◽  
Myung-Ho Jeong ◽  
Gwang-Woo Jeong
Keyword(s):  
Myocardial Ischemia ◽  
Reperfusion Injury ◽  
Real Time ◽  
Intracellular Ph ◽  
Ischemia Reperfusion ◽  
Acute Myocardial Ischemia ◽  
Total Carbon ◽  
Myocardial Ischemia Reperfusion ◽  
Ph Level

AbstractThis study aimed to investigate real-time early detection of metabolic alteration in a rat model with acute myocardial ischemia-reperfusion (AMI/R) injury and myocardial necrosis, as well as its correlation with intracellular pH level using in vivo hyperpolarized [1-13C] pyruvate magnetic resonance spectroscopy (MRS). Hyperpolarized 13C MRS was performed on the myocardium of 8 sham-operated control rats and 8 rats with AMI/R injury, and 8 sham-operated control rats and 8 rats with AMI-induced necrosis. Also, the correlations of levels of [1-13C] metabolites with pH were analyzed by Spearman’s correlation test. The AMI/R and necrosis groups showed significantly higher ratios of [1-13C] lactate (Lac)/bicarbonate (Bicar) and [1-13C] Lac/total carbon (tC), and lower ratios of 13C Bicar/Lac + alanine (Ala), and 13C Bicar/tC than those of the sham-operated control group. Moreover, the necrosis group showed significantly higher ratios of [1-13C] Lac/Bicar and [1-13C] Lac/tC, and lower ratios of 13C Bicar/Lac + Ala and 13C Bicar/tC than those of the AMI/R group. These results were consistent with the pattern for in vivo the area under the curve (AUC) ratios. In addition, levels of [1-13C] Lac/Bicar and [1-13C] Lac/tC were negatively correlated with pH levels, whereas 13C Bicar/Lac + Ala and 13C Bicar/tC levels were positively correlated with pH levels. The levels of [1-13C] Lac and 13C Bicar will be helpful for non-invasively evaluating the early stage of AMI/R and necrosis in conjunction with reperfusion injury of the heart. These findings have potential application to real-time evaluation of cardiac malfunction accompanied by changes in intracellular pH level and enzymatic activity.

scholarly journals Protective effect and mechanistic evaluation of linalool against acute myocardial ischemia and reperfusion injury in rats

RSC Advances ◽  
2017 ◽  
Vol 7 (55) ◽  
pp. 34473-34481 ◽  
Author(s):  
Xiao-Hui Zheng ◽  
Chun-Ping Liu ◽  
Zeng-Guang Hao ◽  
Yan-Fang Wang ◽  
Xian-Li Li
Keyword(s):  
Cell Death ◽  
Myocardial Ischemia ◽  
Protective Effect ◽  
Reperfusion Injury ◽  
Acute Myocardial Ischemia ◽  
Ischemia And Reperfusion ◽  
Ischemia And Reperfusion Injury ◽  
Myocardial Ischemia And Reperfusion

Linalool causes attenuation of IR induced cell death and apoptosis eitherin vitroorin vivo.

scholarly journals 603 Handheld dual-modality ultrasound and photoacoustic imaging for in vivo determination of melanoma depth

2016 ◽  
Vol 136 (5) ◽  
pp. S107
Author(s):  
S.V. Tripathi ◽  
Y. Zhou ◽  
G.P. Linette ◽  
I.S. Rosman ◽  
M. Council ◽  
...  
Keyword(s):  
Photoacoustic Imaging ◽  
Dual Modality
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