Nov 17, 2024 · Cardiac axis represents the sum of depolarisation vectors generated by individual cardiac myocytes. Clinically is is reflected by the ventricular axis, and interpretation relies on determining the relationship between the QRS axis and limb leads of the ECG (below diagram)

We shall now examine the main electrical vectors of the heart and how they are reflected in V1 and V5. Study this figure carefully, as it explains the genesis and appearance of the P, Q, R and S waves on the ECG curve.

Learn everything about ECG leads, electrodes and different lead systems. The 12-lead ECG, including limb leads and precordial (chest) leads are discussed. Includes a complete e-book, video lectures, clinical management, guidelines and much more.

Learn about action potential propagation, electric vectors, and their relationship with ECG. Explore depolarization, repolarization, and ventricular vectors in the heart.

Jan 2, 2017 · Principles of the cardiac action potential, automaticity, refractoryness, electrical vectors, ECG leads ant wavesforms are discussed in this article.

Learn about ECG electrodes, limb and chest electrode placement, Einthoven's Triangle, electrical axis, and the principles behind 12-lead ECG systems.

There are six basic leads discussed below and 6 precordial leads which will be discussed later. The basic leads consist of leads I, II and III and the augmented leads AVR, AVL and AVF. These are present on the basic 3-lead monitors and also on the 12-lead EKG machines.

Learn about electrical vectors, depolarization, repolarization, intervals, segments, and ECG waves like PQ, RR, QRS, QT, ST, T, and U waves.

The standard electrocardiogram (ECG) provides 12 different vector views of the heart’s electrical activity as reflected by electrical potential differences between positive and negative electrodes placed on the limbs and chest wall.

The mean electrical axis is the average of all the instantaneous mean electrical vectors occurring sequentially during depolarization of the ventricles. The figure to the right, which shows the septum and free left and right ventricular walls, depicts the sequence of …