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Cerebral infarction, also known as an ischemic stroke, is the pathologic process that results in an area of necrotic tissue in the brain (cerebral infarct). [1] In mid to high income countries, a stroke is the main reason for disability among people and the 2nd cause of death. [2]
This is typically secondary to stroke, injury, or cardiac arrest due to heart attack. Most ischemic neurons that die do so due to the activation of chemicals produced during and after ischemia. [2] The ischemic cascade usually goes on for two to three hours but can last for days, even after normal blood flow returns. [3]
Chronic hypertension, congenital heart disease with intracardiac shunting, and valvular heart disease may also lead to remodeling. After the insult occurs, a series of histopathological and structural changes occur in the left ventricular myocardium that lead to progressive decline in left ventricular performance.
Coagulative necrosis: 'nuclear changes' 12–24 (pyknosis, karyorrhexis) 1–3 days (loss of nuclei) Depends on size of infarction: Neutrophil infiltration: 12–24 h: 1–3 days: 5–7 days: Karyorrhexis of neutrophils: 1.5–2 days: 3–5 days: Macrophages and lymphocytes: 3–5 days: 5–10 days (including 'siderophages') 10 days to 2 months ...
A blood volume increase would cause a shift along the line to the right, which increases left ventricular end diastolic volume (x axis), and therefore also increases stroke volume (y axis). The Frank–Starling law of the heart (also known as Starling's law and the Frank–Starling mechanism ) represents the relationship between stroke volume ...
Brain ischemia has been linked to a variety of diseases or abnormalities. Individuals with sickle cell anemia, compressed blood vessels, ventricular tachycardia, plaque buildup in the arteries, blood clots, extremely low blood pressure as a result of heart attack, and congenital heart defects have a higher predisposition to brain ischemia in comparison to the average population.
Conversely, more sleep regularity was protective against heart attack and stroke. A new study found an increased risk of cardiovascular events in people with irregular sleep patterns, even when ...
Infarction occurs as a result of prolonged ischemia, which is the insufficient supply of oxygen and nutrition to an area of tissue due to a disruption in blood supply.The blood vessel supplying the affected area of tissue may be blocked due to an obstruction in the vessel (e.g., an arterial embolus, thrombus, or atherosclerotic plaque), compressed by something outside of the vessel causing it ...
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