Introduction to ECG interpretation

The normal electrocardiogram (ECG) waves. ECG interpretation.

ECG interpretation: Characteristics of the normal ECG (P-wave, QRS complex, ST segment, T-wave)

ECG Interpretation Part 1: definitions, criteria and characteristics of the normal ECG (EKG) waves, intervals, durations & rhythm This is arguably one of the most important chapters throughout this course. At the heart of ECG interpretation lies the ability to determine whether the ECG waves and intervals are normal. This chapter will focus on the…

Read chapter

The ECG leads: electrodes, limb leads, chest (precordial) leads, 12-Lead ECG (EKG)

ECG leads: from electrodes to limb leads, chest leads & 12-lead ECG Before discussing the ECG leads and various lead systems, we need to clarify the difference between ECG leads and ECG electrodes. An electrode is a conductive pad which is attached to the skin and enables recording of electrical currents. An ECG lead is a graphical…

Read chapter

Cardiac electrophysiology: action potential, automaticity and vectors

Cardiac electrophysiology: membrane potential, action potential, automaticity and electrical vectors   Video lecture The following video lecture summarises this chapter.   The action potential includes a depolarization (activation) followed by a repolarization (recovery). The action potential occurs in all cardiac cells but its appearance varies depending on cell type. During de- and repolarization ions (Na+ [sodium],…

Read chapter

Clinical electrocardiography and ECG interpretation

Principles of cardiac electrophysiology and ECG interpretation For the heart to work effectively, the atria and the ventricles must be activated rapidly and sequentially. Rapid activation is important in order to activate as much myocardium simultaneously as possible; the more myocardium contracting at the same time the more efficient the pumping mechanism. Sequential activation implies that the…

Read chapter
Figure 19. The Cabrera format and inverted aVR.

Cabrera format of the 12-lead ECG & lead –aVR instead of aVR


Read chapter

How to interpret the ECG / EKG: A systematic approach

Systematic approach to ECG interpretation: efficient and safe method The ECG must always be interpreted systematically. Failure to perform a systematic interpretation of the ECG may be detrimental. The interpretation algorithm presented below is easy to follow and it can be carried out by anyone. The reader will gradually notice that ECG interpretation is markedly facilitated by…

Read chapter
error: Contact us for permission to use contents. Permission will be granted for non-profit sites.

Join our newsletter to get a free ECG pocket guide (today) and future educational content and offers. You can unsubscribe at any time.

Register today to save 90%!