What is reperfusion injury in myocardial infarction?
Ischaemia-Reperfusion injury (IRI) is defined as the paradoxical exacerbation of cellular dysfunction and death, following restoration of blood flow to previously ischaemic tissues. Reestablishment of blood flow is essential to salvage ischaemic tissues.
What is the main cause of reperfusion injury?
Reperfusion injury, sometimes called ischemia-reperfusion injury (IRI) or reoxygenation injury, is the tissue damage caused when blood supply returns to tissue (re- + perfusion) after a period of ischemia or lack of oxygen (anoxia or hypoxia).
How can reperfusion injury be prevented in Michigan?
Mechanical postconditioning using short periods of ischemia immediately after reperfusion, pharmacologic postconditioning targeted to prevent opening of the mitochondrial permeability transition pore, and hypothermia have been shown to prevent reperfusion injury in animals and to reduce infarct size in smaller studies.
How is reperfusion injury diagnosed?
All baseline investigations such as complete blood count showing increased white blood cell count decreased platelets, renal function tests showing elevation in urea and creatinine levels, and liver function tests especially post-liver transplant or resection; all give clues towards a diagnosis of reperfusion injury.
What are some signs and symptoms of reperfusion injury?
Cerebral reperfusion syndrome presents as a triad of ipsilateral headache, contralateral neurological deficits, and seizure. The time frame in which symptoms arise can be from immediately after restoration of blood flow to up to 1 month after restoration. Patients are usually symptomatic within the first week.
What mechanism of cell injury is associated with reperfusion injury?
Mechanism of ischemia-reperfusion injury The obstruction of arterial blood flow causes hypoxia and leads to dysfunction of the electron transport chain in mitochondria. Decreasing ATP production in mitochondria induces anaerobic metabolism, dysfunction of sodium-potassium pumps, and detachment of ribosomes.