QT interval

The QT interval is a measurement on an ECG that reflects the time it takes for the heart's electrical system to fully activate and then recover between beats. It represents the electrical recovery phase of the heart's ventricles, the main pumping chambers. A normal QT interval means the heart's electrical activity is functioning properly, facilitating consistent and efficient heartbeats. If the QT interval is too long or too short, it can signal potential risks for irregular heart rhythms, which can sometimes lead to fainting or more serious conditions. Monitoring the QT interval helps assess overall heart health and electrical stability.