Electrocardiogram Interpretation

Electrocardiogram Interpretation

Lessons on electrocardiogram interpretation are available on this website. We also provide an electrocardiogram reference guide covering 40 abnormalities. Practice what you learn with our drills and quizzes.

What is Electrocardiogram Interpretation?

An electrocardiogram records electrical signals produced in the heart across multiple heart beats and produces an ECG tracing (strip) that is analyzed by medical professionals.

Electrocardiogram Tracings

An electrocardiogram tracing includes multiple components, representing various phases in a heart beat. These components are designated P, Q, R, S, T and U.

The P wave is the first short upward movement of the ECG tracing. It indicates that the atria are contracting.

The QRS complex, normally begins with a downward deflection, Q; a larger upwards deflection, a peak (R); and then a downwards S wave. This QRS complex represents ventricular depolarization and contraction.

The PR interval indicates the transit time for the electrical signal to travel from the sinus node to the ventricles.

T wave is normally a modest upwards waveform representing ventricular repolarization.

Electrocardiogram with P Wave, PR Interval, QRS complex and T wave

illustration 2 adjustment

Electrocardiogram Arrhythmia Drills

Our electrocardiogram drills allow you to practice interpretation using several hundred strips, representing about 40 different conditions.

Electrocardiogram Practice Drills

Electrocardiogram Guide

Our electrocardiogram reference guide provides a tracing and synopsis of key features for many types of arrhythmias. Time intervals on the EKG tracing can be measured using our digital calipers.

ECG Guide

Electrocardiogram Lessons

Our introductory electrocardiogram course introduces the main features of electrocardiogram tracings along with an analysis procedure. This procedure covers assessment of rhythm, calculating heart rate, observing P-wave forms, measurement of intervals and segments and the evaluation of other relevant waves.
EKG practice exercises serve to reinforce the lesson content.

Electrocardiogram Training

ECG Interpretation Tutor

Use our online ECG 'Workbook' to practice your ECG analysis skills and to learn over 40 different types of ECG tracings. After your analysis is completed, our ECG tutor presents an analysis from an ECG expert.

ECG Interpretation Tutor