Which ECG pattern shows impulse moving through ventricles and reaching the Purkinje fibers, depicting contraction of both ventricles?

Which ECG pattern shows impulse moving through ventricles and reaching the Purkinje fibers, depicting contraction of both ventricles?

• A. QT Interval
• B. Repolarization
• C. Rhythm Strip
• D. QRS Complex

Answer: (D)

The impulse moving through the ventricles to the Purkinje fibers, causing both ventricles to contract, is ventricular depolarization, and it appears on an ECG as the QRS complex. The QRS complex represents the rapid, coordinated activation of the ventricles, producing their contraction. In contrast, the QT interval covers the entire time from the start of ventricular depolarization to the end of ventricular repolarization, so it isn’t a single pattern of ventricular contraction. The repolarization of the ventricles is shown by the T wave and isn’t the contraction itself. A rhythm strip is just a tracing of rhythm in general, not a specific pattern of ventricular activation. So, the pattern that best depicts impulse movement through the ventricles and the contraction of both ventricles is the QRS complex.

The impulse moving through the ventricles to the Purkinje fibers, causing both ventricles to contract, is ventricular depolarization, and it appears on an ECG as the QRS complex. The QRS complex represents the rapid, coordinated activation of the ventricles, producing their contraction. In contrast, the QT interval covers the entire time from the start of ventricular depolarization to the end of ventricular repolarization, so it isn’t a single pattern of ventricular contraction. The repolarization of the ventricles is shown by the T wave and isn’t the contraction itself. A rhythm strip is just a tracing of rhythm in general, not a specific pattern of ventricular activation. So, the pattern that best depicts impulse movement through the ventricles and the contraction of both ventricles is the QRS complex.