What does St T wave changes mean?

As a medical professional with expertise in cardiology, I can explain the significance of ST segment and T wave changes on an electrocardiogram (ECG). ST segment and T wave changes on an ECG can be indicative of various cardiac conditions. The ST segment represents the period between the end of the QRS complex and the beginning of the T wave, which corresponds to the time when the ventricles are depolarizing and repolarizing. The T wave represents the repolarization of the ventricles. Changes in these areas can suggest abnormalities in the heart's electrical activity. When we refer to nonspecific ST-T wave abnormalities, it means that while there are changes observed in the ECG, they are not sufficiently characteristic to point to a specific diagnosis without additional clinical context. These changes can be seen in a variety of situations, including non-cardiac issues, and may not always indicate a serious heart condition. It's important to note that just because these changes are labeled as nonspecific, it does not mean they are unimportant. They can still be significant and warrant further investigation, especially if there are accompanying symptoms or if the patient has a history of heart disease.

General Introduction to ST, T, and U wave abnormalities. ... Thus the term, nonspecific ST-T wave abnormalities, is frequently used when the clinical data are not available to correlate with the ECG findings. This does not mean that the ECG changes are unimportant!