Guide to Diagnostic Tests, Seventh Edition by Diana Nicoll & Chuanyi Mark Lu & Stephen J. McPhee

Author:Diana Nicoll & Chuanyi Mark Lu & Stephen J. McPhee [Nicoll, Diana]
Language: eng
Format: azw3
Publisher: McGraw-Hill Education
Published: 2017-03-24T04:00:00+00:00

Reciprocal Changes in the Setting of Acute Myocardial Infarction

ST depressions in leads remote from the primary site of injury are felt to be a purely reciprocal change. With successful reperfusion, the ST depressions usually resolve. If they persist, patients more likely have significant three-vessel disease and so-called ischemia at a distance. Mortality rates are higher in such patients.

Step Five

Identify Electrocardiographic Signs of Infarction in the QRS Complexes

The 12-lead ECG shown below contains numbers corresponding to pathologic widths for Q waves and R waves for selected leads (see Table 7–4 for more complete criteria).

TABLE 7–4. DIAGNOSIS OF MYOCARDIAL INFARCTION.

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