Waveforms

Definition

Waveforms are graphical representations of electrical activity in the heart, typically shown on an electrocardiogram (ECG or EKG). They help in diagnosing and monitoring various cardiac conditions.

5 Must Know Facts For Your Next Test

1. Waveforms are essential for interpreting the electrical conduction system of the heart.
2. Key waveforms include the P wave, QRS complex, and T wave, each representing different phases of cardiac activity.
3. An abnormal waveform can indicate arrhythmias, myocardial infarction, or other cardiac issues.
4. The P wave represents atrial depolarization, while the QRS complex signifies ventricular depolarization.
5. The T wave corresponds to ventricular repolarization and is crucial for assessing the recovery phase of the ventricles.

Review Questions

• What does the P wave represent on an ECG waveform?
• How can abnormalities in waveforms be indicative of cardiac conditions?
• Which part of a waveform signifies ventricular depolarization?

Related terms

Electrocardiogram (ECG): A medical test that records the electrical activity of the heart.

Arrhythmia:

An irregular heartbeat that can be detected through abnormal ECG waveforms.

Depolarization:

The process by which cardiac muscle cells change from a resting state to an active state during the heartbeat cycle.