ECG Terms

3. A life-threatening arrhythmia characterized by chaotic electrical activity in the ventricles
5. The interval between the start of the QRS complex and the end of the T wave
6. The reduction in the difference in electric charge between the inside and outside of a cell membrane
11. A rapid heart rhythm originating above the ventricles
12. A period following an action potential during which a cell is resistant to depolarization
13. The interval between the start of the P wave and the start of the QRS complex
14. The portion of the ECG representing the interval between ventricular depolarization and repolarization
15. The branch of physiology that studies the electrical properties of biological cells and tissues
17. The part of the ECG representing ventricular repolarization
19. A delay or blockage in the conduction of electrical impulses through one of the bundle branches
20. Any unwanted interference or noise on an ECG recording
21. An electronic device implanted in the body to regulate the heart rate and rhythm

1. A heart rhythm originating from the atrioventricular junction
2. A rapid heart rhythm originating from the ventricles, often characterized by wide QRS complexes
4. The part of the ECG representing ventricular depolarization
7. A rapid change in the electrical potential across a cell membrane which allows for the transmission of electrical signals.
8. The restoration of the difference in electric charge across a cell membrane following depolarization
9. A conductor used to establish electrical contact with the body for the purpose of recording electrical signals
10. A specific combination of electrodes used to record electrical signals from the heart
16. The part of the ECG representing atrial depolarization
18. Any abnormality in the rate, rhythm, or conduction of the heart's electrical activity