As a medical professional with expertise in cardiology, I can explain the role of an EKG in diagnosing heart conditions. An EKG (electrocardiogram) is a non-invasive test that records the electrical activity of the heart. It can provide valuable information about the heart's rate, rhythm, and the presence of certain heart conditions, such as a heart attack or damage to the heart muscle. However, an EKG by itself is not specifically designed to detect blockages within the coronary arteries. While an EKG can sometimes show signs that suggest a blockage, such as changes in the heart's electrical activity that occur after a heart attack, it does not directly visualize or confirm the presence of a blockage. To diagnose a blockage, doctors often use other diagnostic tools in conjunction with an EKG. For example, a stress test can be performed to see how the heart responds to physical exertion, which can help identify areas of the heart that may not be receiving enough blood due to a blockage. Additionally, imaging tests like an echocardiogram, nuclear stress test, CT angiography, or catheterization can provide more detailed images of the heart and blood vessels, allowing doctors to see if there is a blockage and where it is located. In summary, while an EKG is a crucial tool in the assessment of heart conditions, it is not the definitive test for detecting blockages. Other diagnostic methods are typically required for a more accurate diagnosis. read more >>

Doctors usually use an EKG (electrocardiogram) to help diagnose heart block. This simple test detects and records the heart's electrical activity. An EKG shows how fast the heart is beating and its rhythm (steady or irregular). ... A standard EKG only records the heart's activity for a few seconds.read more >>