While an ECGElectrocardiogram; also called an EKG; a representation of electrical voltage measured across the chest over a period of time. 1. Six Second ECG Guidebook (2012), T Barill, p. 196 is a superior diagnostic tool, experienced practitioners are witness to false positive and false negative ECGs. A false positive ECGA false positive ECG occurs when ECG findings are abnormal for a patient that is quite healthy. An example of a false positive is the presence of ST elevation that is a benign early repolarization - more common with young... occurs when ECG findings are abnormal for a patient that is quite healthy. An example of a false positive is the presence of ST elevationThe upward placement of the ST segment greater than 1 mm from the isoelectric line; suggestive of cardiac infarction or ischemia. Between the QRS complex and the T wave, lies the ST segment. The ST segment usually follows the isoelectric... that is a benign early repolarizationFollows depolarization, involving the return to a pre-depolarization state; the myocardial cell’s electrical potential returns from +30 mV to its polarized state of –90 mV; the ions potassium, calcium and sodium are largely involved; note that contraction of the myocardial... – more common with young athletes. Conversely, a false negative ECGA false negative ECG does not indicate the presence of cardiac disease that is subsequently established. While an ECG is a superior diagnostic tool, experienced practitioners are witness to false positive and false negative ECGs. A false positive ECG occurs... does not indicate the presence of cardiac disease that is subsequently established. The bottom line: a 12 lead ECG is a tool best used in conjunction with previous ECGs, a thorough physical assessment and an in-depth cardiac history.
1. Six Second ECG GuidebookA Practice Guide to Basic and 12 Lead ECG Interpretation, written by Tracy Barill, 2012 Introduction The ability to correctly interpret an electrocardiogram (ECG), be it a simple six second strip or a 12 lead ECG, is a vital skill... (2012), T Barill, p. 152