When observing an ECG, you will see many different deflections from baseline known as waves. These deflections represent various electrical events taking place in the heart that give rise to the mechanical events that help move blood. In addition to the waves that can be observed, there are flat lines between waves and successive cardiac cycles called segments that also represent particular electrical events that take place in the heart. Finally, certain combinations of waves and segments, known as intervals, also identify important events recorded by the ECG. Match each of the following events with the correct phase of an ECG. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. A. P wave
B. ST segment
C. QRS complex
D. PR segment
E. T wave
F. QT Interval
1. Atrial depolarization.
2. The ventricles are in their depolarized state.
3. Total time it takes for the ventricular muscle to depolarize and repolarize.
4. Ventricular depolarization.
5. Conduction through the atrioventricular (AV) node.
6. Ventricular repolarization.
7. Conduction through the atrioventricular (AV) bundle.