q wave การใช้

• It is often less extensive than heart attacks showing q waves.
• Normal Q waves, when present, represent depolarization of the interventricular septum.
• Myocardial infarctions with pathological Q waves are referred to as ST elevation MIs.
• Pathological Q waves may appear within hours or may take greater than 24 hr.
• Q wave may appear and the T wave will invert.
• Not every QRS complex contains a Q wave, an R wave, and an S wave.
• The terms Q wave and non-Q wave MI were previously used to indicate STEMI and non-STEMI respectively.
• They may include QT prolongation, Q waves, cardiac dysrhythmias and ST elevation that mimics a heart attack.
• The terms Q wave and non-Q wave MI were previously used to indicate STEMI and non-STEMI respectively.
• Pathologic q waves generally will remain permanently.
• It is also used to prevent clotting during hemodialysis, and for treatment of unstable angina and non-Q wave myocardial infarction.
• Long term changes of ECG include persistent Q waves ( in 90 % of cases ) and persistent inverted T waves.
• Acute coronary syndrome is a life-threatening condition that doctors also call unstable angina and non-q wave myocardial infarction, or a mild heart attack.
• A cardiac troponin rise accompanied by either typical symptoms, pathological Q waves, ST elevation or depression, or coronary intervention is diagnostic of MI.
• For this reason, they are referred to as septal Q waves and can be appreciated in the lateral leads I, aVL, V5 and V6.
• Pathologic Q waves occur when the electrical signal passes through stunned or scarred heart muscle; as such, they are usually markers of previous myocardial infarctions, with subsequent fibrosis.
• The advisory panel is discussing whether Lovenox should be approved for treating unstable angina, a condition marked by severe chest pain, and nonfatal heart attacks known as non-Q wave myocardial infarctions.
• A pathologic Q wave is defined as having a deflection amplitude of 25 % or more of the subsequent R wave, or being ( 40 ms ) in width and in amplitude.
• The panel voted 6 to 2 that the drug is effective for treating unstable angina, a condition marked by severe chest pain, and nonfatal heart attacks known as non-Q wave myocardial infarctions.
• At least 10 % of patients with STEMI do not develop myocardial necrosis ( as evidenced by a rise in cardiac markers ) and subsequent Q waves on EKG after reperfusion therapy.