The nurse suspects an old infraction for a patient presents with chest pain. the nurse performs a12-lead electrocardiogram that reveals an abnormal q wave.
An old infract means that the patient possibly had a heart attack at an undetermined time in the past. A second test is typically taken to confirm the finding, because the results may instead be due to incorrect placement of electrodes on the chest during the exam.
Old infractions are found on electrocardiogram through loss of anterior forces, leaving Q waves in leads V1 and V2. This is a cause of poor R wave progression.
Causes of old myocardial infarction are smoking, high blood pressure, diabetes, old age.
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