QT interval, short for QT, encompasses the depolarization and repolarization time of the ventricles, representing the total duration of ventricular depolarization and repolarization processes. It is the time from the onset of the QRS complex to the end of the T wave. The measured value of QT interval varies with age and gender. So, what is the normal range for QT interval?

The normal range for QT interval fluctuates between 330 and 450 milliseconds, but the normal values can be influenced by various factors such as age, heart rate, gender, medications, and autonomic nervous system function, all of which can cause slight variations in the QT interval.

The QT interval is an electrocardiographic term. For the measurement of the QT interval, it is important to select the larger T wave and provide clear lead ends. The QTc interval is the heart rate-corrected QT interval, which serves as an indicator of cardiac depolarization and repolarization. Prolongation of the QTc interval indicates delayed cardiac repolarization and reflects abnormal electrocardiogram findings, often closely associated with increased susceptibility to arrhythmias.

Prolonged QT interval may be due to a longer pause in cardiac pacing or bradycardia. It is best to seek guidance from a doctor for proper management. In daily life, it is important to manage work stress and maintain a relaxed mindset. Avoid prolonged periods of tension and ensure a balanced lifestyle. Pay attention to maintaining a healthy balance between work and rest, and follow a sensible diet. I hope this response has been helpful. Wishing you good health and a happy life!