This BSL lesson explains Einthoven’s triangle and allows the students to record their ECG using bipolar Leads (I, II, and III). The students will attach Leads I and III and the software will calculate Lead II for them, using Einthoven’s law. The system displays the data for all three Leads. The students will perform a number of tasks designed to change the rhythm of the heart. They will analyze the data and calculate the Mean Electrical Axis of the heart.
Record ECG from Leads I and III in three conditions: lying down, sitting up, and breathing deeply while sitting.
Review the ECG for Lead II.
Correlate the direction of the QRS complex (±) with the direction of the Lead axis.
Estimate the Mean Electrical Axis of the QRS complex using two methods.
Tasks Performed by the Student
BSL Lessons are designed to allow at least four students to record and save data in a normal lab period (60-90 minutes). Typically, labs work most efficiently with three or more students working together at each BSL station.
Record ECG using bipolar Leads I and III
Sit and relax.
Lie down and relax.
Take five deep breaths and mark each event.
The software makes it very easy for the student to compute the ECG vectors.
The analysis is made easy allowing the student and instructor to concentrate on the important concepts of elctrocardiography.
The display uses classic, clinical grid markings for quick and easy evaluations.
Students record from Leads I and III and the system automatically calculates and displays Lead II.
The software allows the student to overlap the three Leads and zoom in for a superior view.
See how the ECG complex changes under different conditions.
Students can place markers for each of the components (P, Q, R, S, and T).
The software automates the calibration procedure for the student. There are no knobs and dials to confuse them.
On-screen commands prompt the students throughout the lesson.
BIOPAC’s Simple Sensors warn students if they plug the wrong device or transducer into the system.
The lesson will also work as part of a group study.
BSL Instructor’s Guide provides lab tips and lesson options.
BSL Answer Guide included.
BSL L06 Recording
This lesson requires a Biopac Student Lab (BSL) System and the following hardware. If your BSL System does not include all hardware items, expand your system by selecting required items below. For more details, review the Lesson: L# BSL Lessons - see the Lab Manual or launch BSL; A# and H# BSL PRO Lessons, click the PDF link above to review full setup, recording, and analysis procedures.
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