Key result
Physiologic stimuli such as posture, exercise, and eating can cause transient ECG changes, such as T-wave inversion and P-R prolongation, that mimic ischemic heart disease in normal persons.
Physiologic stimuli such as posture, exercise, and eating can cause transient ECG changes that mimic ischemic heart disease, emphasizing the need for careful interpretation.
After the unrecognized normal variant,1the next most important coronary mimic is the physiologic stimulus that upsets the electrocardiogram. Changes so produced are obviously not indicative of heart disease and usually revert to normal soon after the stimulus is removed. Simplest of these are the changes with posture: for example, the normally upright T2wave may become inverted and the normal P-R interval may become prolonged when the subject stands. Since ECGs are, in practice, seldom recorded with the patient in any but the recumbent position, this is an unimportant source of confusion. Exercise can produce widespread inversion of T waves in susceptible normal persons and it is therefore important never to regard an exercise test as positive because of T-wave changes alone. The primitive, self-preservative act of eating may prolong A-V conduction and may flatten or invert the T waves. This change is apparently related to the carbohydrate
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Henry J.L. Marriott (1967) conducted a review in Ischemic heart disease mimics (ECG changes). Physiologic stimuli (posture, exercise, eating) was evaluated on Electrocardiogram (ECG) changes. Physiologic stimuli such as posture, exercise, and eating can cause transient ECG changes, such as T-wave inversion and P-R prolongation, that mimic ischemic heart disease in normal persons.
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