What does Subendocardial mean?
Medical Definition of subendocardial : situated or occurring beneath the endocardium or between the endocardium and myocardium subendocardial blood loss.
What does the term infarction mean?
injury or death of tissue
: injury or death of tissue (as of the heart or lungs) resulting from inadequate blood supply especially as a result of obstruction of the local circulation by a thrombus or embolus : the process of forming an infarct In myocardial infarction a coronary artery becomes obstructed and this leads to irreversible damage …
What is Subendocardial layer?
[ sŭb′ĕn-dō-kär′dē-əl ] n. The layer of loose connective tissue that joins the endocardium and myocardium.
Where is the subendocardial layer?
The subendocardial layer lies between, and joins, the endocardium and the myocardium. It consists of a layer of loose fibrous tissue, containing the vessels and nerves of the conducting system of the heart. The purkinje fibres are located in this layer.
What is infarction in pathology?
Infarction is tissue death or necrosis due to inadequate blood supply to the affected area. It may be caused by artery blockage, rupture, mechanical compression, or vasoconstriction. Infarction care is divided based on histopathology (white infarction and red infarction) and location (heart, brain, lung, etc.).
Where is the Subendocardium?
Description. The Purkinje fibers (Purkyne tissue or subendocardial branches) are located in the inner ventricular walls of the heart, just beneath the endocardium in a space called the subendocardium.
What is the Subepicardial layer?
subepicardial layer the layer of loose connective tissue uniting the epicardium and myocardium.
What are the causes of MI?
A myocardial infarction (commonly called a heart attack) is an extremely dangerous condition caused by a lack of blood flow to your heart muscle. The lack of blood flow can occur because of many different factors but is usually related to a blockage in one or more of your heart’s arteries.
What is the meaning of subendocardial?
Medical Definition of subendocardial : situated or occurring beneath the endocardium or between the endocardium and myocardium subendocardial blood loss Learn More About subendocardial Dictionary Entries Near subendocardial
Why does stenosis reduce blood flow away from the subendocardium?
Stenosis induces reduced perfusion pressure, blood flow redistribution away from the subendocardium, and consequent subendocardial vulnerability. We propose that the flow redistribution stems from the higher compliance of the subendocardial vasculature.
Why is subendocardial ischemia vulnerable to a reduction in perfusion pressure?
In conclusion, subendocardial vulnerability to a acute reduction in perfusion pressure stems primarily from differences in vascular compliance induced by transmural differences in both extravascular loading and vessel wall thickness. Subendocardial ischemia can be improved by a reduction of heart rate and left ventricular pressure.