The clinical treatments described and recommended in this publication are based on research and consultation with nursing, medical, and legal authorities. To the best of our knowledge, these procedures reflect currently accepted practice. Nevertheless, they can’t be considered absolute and universal recommendations. For individual applications, all recommendations must be considered in light of the patient’s clinical condition and, before administration of new or infrequently used drugs, in light of the latest package-insert information. The authors and publisher disclaim any responsibility for any adverse effects resulting from the suggested procedures, from any undetected errors, or from the reader’s misunderstanding of the text. .

Electrocardiographs detect the electrical signals associated with cardiac activity and produce an ECG, a graphic record of the voltage versus time. They are used to diagnose and assist in treating some types of heart disease and arrhythmias, determine a patient’s response to drug therapy, and reveal trends or changes in heart function. Multichannel electrocardiographs record signals from two or more leads simultaneously and are frequently used in place of single-channel units. Some electrocardiographs can perform automatic measurement and interpretation of the ECG as a selectable or optional feature .

If you are a cardiologist in practice, a fellow in training, an echo technologist, or a cardiac anesthesiologist, then this is the right place to help you learn and review principles of ECG /EKG..

This information on this site is meant to be purely educational and in no way should substitute for clinical judgment or be used as a means to make decisions regarding clinical care.

ECG Basics:-
ECG Rate
ECG Rhythm
ECG Axis Calculation
Lead positioning
ECG Waves:-
P wave
Q wave
R wave
T wave
U wave
Osborne wave
Delta wave
Epsilon Wave
Intervals and Segments:-
PR interval
PR Segment
QT Interval
ST Segment
J point
QRS complex
ECG anatomy:-
Left Atrial Enlargement
Right Atrial Enlargement
Bi-Atrial Enlargement


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