Learn How to Read an Electrocardiogram (ECG/EKG) Step 01 ...
The heart's electrical axis refers to the general direction of the heart's depolarization wavefront (or mean electrical vector) in the frontal plane. With a healthy conducting system the cardiac axis is related to where the major muscle bulk of the heart lies. Normally this is the left ventricle with some contribution from the right ventricle. It is usually oriented in a right shoulder to left leg direction, which corresponds to the left inferior quadrant of the hexaxial reference system, although −30° to +90° is considered to be normal. If the left ventricle increases its activity or bulk then there is said to be "left axis deviation" as the axis swings round to the left beyond -30°, alternatively in conditions where the right ventricle is strained or hypertrophied then the axis swings round beyond +90° and "right axis deviation" is said to exist. Disorders of the conduction system of the heart can disturb the electrical axis without necessarily reflecting changes in muscle bulkThere are twelve leads in total, each recording the electrical activity of the heart from a different perspective, which also correlate to different anatomical areas of the heart for the purpose of identifying acute coronary ischemia or injury. Two leads that look at neighbouring anatomical areas of the heart are said to be contiguous (see color coded chart). The relevance of this is in determining whether an abnormality on the ECG is likely to represent true disease or a spurious finding.
Electrical Axis Deviation - Bookshelf
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Micro EKG - Mad Scientist Software
The average direction of electrical activity is the "QRS axis. ... Right axis deviation is seen on the ECG when more electrical forces are moving to the right than normal. ...
ECG / EKG axis
12-lead ECG library, ECG / EKG electrical axis at a glance ... causes of right axis deviation. normal finding in children and tall thin adults. right ventricular hypertrophy ...
QRS axis - ECGpedia
The electrical heart axis is an average of all depolarizations in the heart. ... A change of the heart axis or an extreme deviation can be an indication of pathology. ...
Left axis deviation - Wikipedia, the free encyclopedia
The hexaxial reference system is a diagram that is used to determine the heart's electrical axis in the frontal plane. Left axis deviation is ...
Carson and Appleton, MD
WHAT IS EKG AXIS DEVIATION? The EKG that we obtain represents the electrical activity of the heart and it ... common abnormalities we see are right or left axis deviation. ...
