>>>>The ST segment can become either depressed or elevated for ventrical receiving an insufficient supply of blood and/ or the heart cells are difficient of oxygen (hypoxia). ,
QUOTE: is transmural mi is called q wave mi definitely?
is transmural mi is called q wave mi definitely?
>>>>>The presence of the Q wave in the absence of ST and T wave abnormality generally indicates prior or healed infarction. Q wave MI, which is diagnosed by the presence of pathological Q waves and is also called transmural infarction.
The classic changes of dead heart cells (Q waves), injury (ST elevation), and occluded vessels (partial blockage) causes T wave inversion and may all be seen during acute infarction.
"In recovery, the ST segment is the earliest change that normalizes, then the T wave; the Q wave usually persists. Therefore, the age of the infarction can be roughly estimated from the appearance of the ST segment and T wave. The presence of the Q wave in the absence of ST and T wave abnormality generally indicates prior or healed infarction."
Why there can be mixed EKG signals during an acute myocardial infarction, because the central area of dead cells is generally surrounded by an area of injury, which in turn is surrounded by an area of heart cells with insufficient oxygen so various stages of myocardial damage can coexist. The distinction between cells that lack good blood flow and dead cells is a determination whether the conditions are reversible.
Hope this helps give you a perspective, and EKG abnormal signals can be due to many non-cardiac conditions, so an EKG requires supporting other clinical evidence, symptoms, etc. Take care and thanks for the quesiton.
Copyright 1994-2016 MedHelp International. All rights reserved.
MedHelp is a division of Aptus Health.
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.