![]() ![]() During 2002–2004 all cases were systematically reviewed. The review from 1997 to 2002 was not systematic, and some cases were missed. Most tracings were recorded by Marquette Models MAC6, MAC8, MAC15, or MACVU ECG machines (GE Marquette Electronics, Milwaukee, WI, USA), and printed out for inspection at paper speed of 25 mm/s and amplitude of 1 mV = 10 mm. In this laboratory, about two‐thirds of ECGs come from outpatients. In the population studied, MI was present in only a small minority of subjects under 40 years of age with AQW, but was usually present in older subjects with similar AQW.ĮCGs processed through the Electrocardiography Laboratory of the UCLA Medical Center in the years 1997–2004 were reviewed by the author to select those with AQW in subjects between ages 18 and 40 years. Some types of AQW were more useful than others in ruling MI in or out.Ĭonclusions: AQW were a strong indicator of organic heart disease in both adult age groups, but their utility to indicate MI was age‐dependent. Etiologies of cardiac disease differed between younger and older subjects. Results: Cardiac disease was present in 90.2% and 92.7% of the younger and older subjects, respectively, whereas MI was present in only 15.9% of younger subjects and in 68.3% of older subjects. Methods: Eighty‐two subjects under 40 years of age with AQW were compared with 82 subjects from the same institution aged ≥40 years with similar AQW to determine the presence or absence of cardiac disease or MI. As an imperfectly specific sign of MI, the usefulness of AQW in identifying MI depends on its incidence in the population studied. Background: Abnormal Q waves (AQW) in the electrocardiogram are commonly ascribed to underlying myocardial infarction (MI). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |