Identify the reference
Electronic acquisition unit with controls. Display or paper output for waveforms. Lead connections receive surface-electrode signals
MEDIVEERSETHE PRACTICAL HUBLOOK CLOSELY / UNDERSTAND CLEARLY
ECG recording and interpretation
Recognise an ECG recorder and outline identity, recording quality and systematic interpretation.
REFERENCE GALLERY1 / 1 reference
1
Paper trace
Paper trace: located on the reference instrument. Compare its shape and position with the apparatus used in your practical.
Zoom in, then drag to inspect. Keyboard: + / − to zoom, arrows to pan, 0 to reset. Tap the numbered markers to explore parts.
Electrocardiograph — reference view
Image: Zeeshan2907 · Source / original · CC BY-SA 4.0Resized and converted to WebP; original colours retained.
Identify and explain
Electrodes detect voltage differences; amplification and recording produce leads that view the cardiac electrical field from different directions.
- Electronic acquisition unit with controls
- Display or paper output for waveforms
- Lead connections receive surface-electrode signals
Explain the measurement
Electrodes detect voltage differences; amplification and recording produce leads that view the cardiac electrical field from different directions.
Interpret in context
Check patient identity, calibration and recording quality before interpreting a rhythm or tracing. The photograph shows the recorder, not a teaching ECG diagnosis.
At the viva table
Try answering aloud, then open the suggested answer. Examiner questions vary.
01 / What does the P wave represent?
Atrial depolarisation.
02 / What does the QRS complex represent?
Ventricular depolarisation; atrial repolarisation is usually obscured within it.
03 / How many electrodes are used for a standard 12-lead ECG?
Ten: four limb and six precordial electrodes. A lead is a view, not simply an electrode.
04 / What does the T wave represent?
Ventricular repolarisation.