alexa Natural course of electrocardiographic components and stages in the first twelve hours of acute myocardial infarction.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): Klainman E, Sclarovsky S, Lewin RF, Topaz O, Farbstein H,

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Abstract Time course evolution of R, Q, T and ST components of the electrocardiogram during the first 12 hours of an acute myocardial infarction was studied. A comparison between anterior-extensive and anteroseptal wall infarctions (anterior group), and inferior-extensive and inferior wall infarction (inferior group) showed appearance of significant Q waves within two hours in both groups. R wave loss was nearly a mirror image of Q wave development in both groups. T waves became negative and ST more isoelectric earlier in the inferior than in the anterior group. When combined variations of the four electrocardiographic components were analyzed, four stages of acute infarction were delineated. Stage I--tall R, no Q, ST elevation and positive T; Stage II--significant Q wave appearance; Stage III--negativity of T waves; and Stage IV--ST isoelectric. The inferior group reached stages III-IV within 12 hours; the anterior group remained mostly in stage II. An early appearance of Q waves correlated well with rapid progression to stages III-IV within 12 hours in both infarction groups.
This article was published in J Electrocardiol and referenced in Journal of Microbial & Biochemical Technology

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