What can a significant ST segment deviation suggest?

What can a significant ST segment deviation suggest?

• A. Normal cardiac function
• B. Possible ischemia or injury
• C. Adverse effect of medications
• D. Existence of arrhythmias

Answer: (B)

A significant ST segment deviation is an important finding on an electrocardiogram (EKG or ECG) that can strongly suggest possible ischemia or injury to the heart muscle. Ischemia refers to a reduction in blood flow, which can lead to insufficient oxygen reaching the heart tissue. This lack of proper blood supply can result from various factors such as coronary artery disease or acute myocardial infarction (heart attack).

When the ST segment deviates from its baseline—either ascending (elevation) or descending (depression)—it indicates changes in the electrical activity of the heart muscle in response to this compromised blood flow. In cases of ST segment elevation, there is often a more severe lack of blood flow that may indicate a more acute form of heart damage, while ST segment depression can suggest less severe ischemia or a previous injury.

Understanding the significance of ST segment deviations helps healthcare professionals assess cardiac conditions effectively and decide on the appropriate interventions needed to address the underlying issues.