Biological measurement key terms

Electrode

A conductor through which electricity enters or leaves an object, used in ECG machines to detect electrical signals from the heart.

Electrical Signal

A variation in voltage or current that carries information, generated by the heart's electrical activity and detected by electrodes.

Cardiac Cycle

The sequence of events in the heart from the beginning of one heartbeat to the beginning of the next, during which electrical signals are generated and detected.

P wave

P wave means The first deflection in a normal ECG waveform, representing atrial depolarization. In ECG machines and the normal ECG waveform, use it precisely to explain Identify key features of a normal ECG waveform. and connect the term to a measurable signal, image, dose or detector response.

QRS complex

A series of three deflections in a normal ECG waveform, indicating ventricular depolarization.

T wave

The deflection following the QRS complex in a normal ECG waveform, representing ventricular repolarization.

ECG waveform

A graphical representation of the electrical activity of the heart over time, showing distinct phases corresponding to heartbeats.

PQRST complex

The sequence of waves in an ECG waveform representing the depolarization and repolarization of the heart's atria and ventricles.

cardiac cycle

The series of events that occur in the heart from the beginning of one heartbeat to the beginning of the next, including contraction and relaxation phases.

Amplification

The process of increasing the strength of electrical signals to ensure accurate ECG readings.

Filtering

The technique used to remove unwanted noise from the electrical signals detected by ECG electrodes.

ECG Measurement

The method of recording the electrical activity of the heart to monitor its function and detect abnormalities.