Coronary Reperfusion
Coronary Reperfusion - Related Videos
06:32
Evaluation of Coronary Flow Reserve After Myocardial Ischemia Reperfusion in Rats
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Cited by 14 •
2019
Coronary flow reserve (CFR), is defined as the ratio of maximal coronary blood flow to the resting coronary blood flow. We present a protocol for evaluating CFR in rats via ultrasound, which offers the opportunity to predict cardiovascular risk factors in the absence of obstructive coronary disease.
05:07
Dynamic Assessments of Coronary Flow Reserve after Myocardial Ischemia Reperfusion in Mice
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Cited by 3 •
2023
The present protocol describes a modified parasternal long-axis view for swift and precise localization of the left anterior descending artery. This approach is designed to be simpler and more user-friendly while facilitating the examination of dynamic changes in coronary flow reserve following myocardial ischemia-reperfusion in mice.
14:35
Post-Myocardial Infarction Heart Failure in Closed-chest Coronary Occlusion/Reperfusion Model in Göttingen Minipigs and Landrace Pigs
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Cited by 14 •
2021
The overall goal of the current study is to present the techniques of induction of myocardial infarction (MI) and post-myocardial infarction heart failure (post-MI HF) in closed-chest, adult Göttingen minipigs and the characterization of post-MI HF model in Göttingen minipigs as compared to Landrace pigs.
05:41
Left Anterior Descending Coronary Artery Ligation for Ischemia-Reperfusion Research: Model Improvement via Technical Modifications and Quality Control
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Cited by 5 •
2022
Herein, we present a protocol focusing on the quality control of the left anterior descending coronary artery ligation by technically modifying the traditional procedure in rats for acute myocardial ischemia-reperfusion research.
07:23
Improved Rodent Model of Myocardial Ischemia and Reperfusion Injury
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2022
Myocardial ischemia-reperfusion model of rat heart is improved by using a self-made retractor, polyvinyl chloride tube, and a unique knotting method. Electrocardiogram, triphenyltetrazolium chloride and histological staining, and percent survival analysis results showed that the improved model group has higher success and survival rates than the already existing model group.
FAQs
The two strategies reopen the obstructed vessel by different routes. Fibrinolytic drugs dissolve the occluding clot, whereas percutaneous coronary intervention mechanically reopens the artery, often with balloon angioplasty and stent placement. Comparing these mechanisms helps distinguish pharmacologic restoration of flow from a procedure that directly re-establishes the vessel’s passage during acute myocardial infarction.
Restoring flow can itself stress injured myocardium. Reoxygenation may trigger inflammation and oxidative stress, a combination described as ischemia-reperfusion injury. Thus, the therapeutic benefit of renewed oxygen delivery must be considered alongside possible injury during reoxygenation. This mechanism motivates research into treatments that protect cardiac tissue while blood flow is being restored.
Because ongoing coronary obstruction sustains myocardial ischemia, delay prolongs the period in which heart muscle lacks adequate oxygen delivery. Reperfusion is therefore treated as time-sensitive: restoring flow sooner is linked in the provided context with limiting ischemia, preserving myocardium, and supporting ventricular function. Timing is consequently a central clinical and research consideration.
In the described approach, PCI mechanically reopens the affected coronary vessel. Balloon angioplasty is used as part of that reopening process, and a stent may be placed as part of the intervention. These elements distinguish PCI from drug-based clot dissolution and provide a concrete procedural framework for restoring coronary blood flow in acute myocardial infarction.
Acute myocardial infarction is the central medical setting identified for this intervention. In that context, treatment focuses on limiting myocardial ischemia and preserving heart muscle, with reperfusion also associated with improved survival and ventricular function. The topic therefore connects an urgent treatment decision with longer-term cardiac outcomes rather than representing only a technical method for reopening an artery.
Research extends beyond restoring blood flow because reoxygenation can produce ischemia-reperfusion injury through inflammation and oxidative stress. This creates a dual objective: recover oxygen delivery while reducing harm to the myocardium during reoxygenation. Studies of protective therapies therefore use reperfusion as a context for investigating how cardiac tissue can be preserved during treatment of acute myocardial infarction.