axis deviation

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Related to axis deviation: Right Axis Deviation, left axis deviation

deviation

[de″ve-a´shun]

1. a turning away from the regular standard or course.

2. in ophthalmology, strabismus.

3. in statistics, the difference between a sample value and the mean.

axis deviation an axis shift in the frontal plane, as seen on an electrocardiogram. There are three types: Left, from −30° to −90°; Right, from +90° to +180°; and Undetermined, which may be either extreme left or extreme right, from −90° to +180°.

conjugate deviation dysfunction of the ocular muscles causing the two eyes to diverge to the same side when at rest.

sexual deviation sexual behavior or fantasy outside that which is morally, biologically, or legally sanctioned, often specifically one of the paraphilias.

standard deviation (SD) the dispersion of a random variable; a measure of the amount by which each value deviates from the mean. It is equal to the square root of the variance. For data that have a normal distribution, about 68 per cent of the data points fall within (plus or minus) one standard deviation from the mean and about 95 per cent fall within (plus or minus) two standard deviations. Symbol σ.

ulnar deviation a hand deformity, seen in chronic rheumatoid arthritis and lupus erythematosus, in which swelling of the metacarpophalangeal joints causes the fingers to become displaced to the ulnar side. Called also ulnar drift. See illustration.

Ulnar deviation (ulnar drift) of the metacarpophalangeal joint, a characteristic sign of rheumatoid arthritis. From Pedretti and Early, 2001.

ax·is de·vi·a·tion

deflection of the electrical axis of the heart to the right or left of the normal.
See also: left axis deviation, right axis deviation, axis.

Synonym(s): axis shift

axis deviation

an electrocardiogram trace in which the QRS axis of the heart in the frontal plane lies outside the usual range of -30 to 110 degrees. It represents an abnormal direction of ventricular depolarization.

ax·is de·vi·a·tion

(ak'sis dē-vē-ā'shŭn)

Deflection of the electrical axis of the heart to the right or left of the normal.
See also: axis
Synonym(s): axis shift.

ax·is de·vi·a·tion

(ak'sis dē-vē-ā'shŭn)

Deflection of the electrical axis of the heart to the right or left of the normal.
See also: axis
Synonym(s): axis shift.

References in periodicals archive ?

Our patient's score was 11 points, meeting all criteria except left axis deviation.

Snakebite and a heart murmur

Serial electrocardiograms (Figure 3) showed left axis deviation and changes compatible with anterior wall acute myocardial infarction.

Repeat electrocardiogram continued to show left axis deviation and small R waves in the initial precordial leads, but the T waves in the precordial leads now had reverted to an upright position (Figure 3).

Isolated ventricular septal defect caused by nonpenetrating trauma to the chest

This much left axis deviation of the P wave is unusual in atrioventricular septal defect limited to the lowermost portion of the atrial septum, so-called ostium primum atrial septal defect (1, 2), but often is found when the entire atrial septum is missing (3, 4).

Twin pregnancy, dyspnea, cyanosis, and a heart murmur

His electrocardiogram in sinus rhythm was grossly abnormal, showing a slightly long P-R interval, right atrial enlargement, right axis deviation, and right ventricular enlargement (Figure 2).