Teaching the basic principles of electrocardiography experimentally

Area of Science:

• Biomedical Engineering
• Medical Education

Background:

• Electrocardiography (ECG) is a cornerstone of clinical diagnosis, yet understanding its fundamental principles can be challenging.
• Traditional ECG education often lacks practical, visual learning experiences for core concepts like electric dipoles and potential fields.

Purpose of the Study:

• To develop and present an accessible, experimental approach for hands-on learning of basic electrocardiography principles.
• To enable students to visualize the heart's electric dipole and induced potentials within a simulated body model.

Main Methods:

• An experimental model using a low-conductivity rubber foil and DC power unit was constructed to simulate the heart's electric dipole.
• Equipotential lines and simple electrocardiograms (bipolar and unipolar leads) were measured using a low-cost voltmeter.
• Students also performed personal ECG measurements using a handheld ECG device to connect the model to clinical practice.

Main Results:

• The experimental model successfully simulated the electric dipole of the heart and visualized induced electric potentials.
• Students could determine characteristic equipotential lines and measure basic ECG leads.
• The integration of personal ECG measurements enhanced the relevance and engagement of the learning exercise.

Conclusions:

• This experimental setup provides an effective and engaging method for teaching the fundamental principles of electrocardiography.
• The model facilitates a deeper understanding of electric dipoles and potential visualization in a simulated physiological context.
• Combining the model with personal ECG device usage bridges the gap between theoretical learning and clinical application.