What is the term for the point where the QRS complex meets the ST segment?

The term for the point where the QRS complex meets the ST segment is known as the J point. This is an important feature in an electrocardiogram (EKG) because it represents the junction between the end of ventricular depolarization, indicated by the QRS complex, and the beginning of ventricular repolarization, marked by the ST segment. This point is critical for assessing various cardiac conditions, including ischemia and the overall health of the myocardium.

Understanding the J point is vital for EKG interpretation because deviations from the normal position of the J point can reflect underlying pathological changes. For instance, elevation or depression of the J point can indicate conditions such as acute myocardial infarction or other forms of heart strain.