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- $Unique_ID{BRK01204}
- $Pretitle{}
- $Title{What is Ischemia?}
- $Subject{heart ischemia angina attack circulatory system myocardial infarction
- ischemic disease deficiency blood supply obstruction constriction arteries
- supplies oxygen coronary artery systems diseases deficiencies obstructed
- constricted infarctions}
- $Volume{G-3}
- $Log{
- The Heart's Blood Supply*0008901.scf}
-
- Copyright (c) 1991-92,1993 Tribune Media Services, Inc.
-
-
- What is Ischemia?
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-
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-
- QUESTION: I read your column each day and today it was about angina. A
- mention of myocardial infarction or heart attack was included. Is this the
- same as myocardial ischemic disease? If not, what is ischemia? Thank you in
- advance for your answer.
-
- ------------------------------------------------------------------------------
-
- ANSWER: It is not difficult to get lost in the maze of terms we doctors use
- about disease, and though I should know better, I guess I wasn't as clear
- about these conditions as I want to be. So let's go back and do it again, and
- hopefully get it right this time. Ischemia (from the Greek word "ischein" to
- suppress, and "haima" blood) literally means a deficiency of blood supply to
- the heart, usually from an obstruction or constriction in the arteries that
- supply blood to the heart. Because it is this blood supply that supplies the
- oxygen that heart cells need to live, ischemia is also used to describe
- situations in which there is an insufficient supply of oxygen to tissues.
- When the coronary arteries are the affected vessels, it may be called
- "coronary artery disease" as well. When a sudden blockage of these arteries
- occurs, perhaps due to the formation of a clot inside the artery, the heart
- muscles are suddenly deprived of their needed oxygen supplies and a "heart
- attack" occurs, with all the well known symptoms of acute chest pain and
- shock. If the situation cannot be speedily reversed (and it can in some
- incidences, due to new medications and techniques), the muscle tissue dies.
- And that's when the word "infarct" is used for it means "an area of tissue
- death due to local ischemia resulting from the obstruction of circulation to
- the area". Add the word "myocardial" to the term ("myo" for muscle, "cardio"
- for heart), and the diagnosis is complete. In the case of angina, the
- circulation blockage may not be complete, and the partial reduction of blood
- flow to the heart is enough to cause heart muscles to suffer an oxygen lack
- without dying. The pain that this condition causes may make the patient stop
- all other activity, reducing the strain on the heart, and giving it a moment
- or two to catch up on its oxygen requirements.
-
- ----------------
-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
-
-