significance of axis deviation Flashcards
A normal variant Axis deviation can be seen in
right axis deviation
Tall, thin, people all
right axis deviation can be seen in right
Right ventricular hypertrophy
right axis deviation can be seen in lateral
Lateral myocardial infarction or Peri -infarction block
right axis deviation can be seen in the de-
dextro cardia or right/left arm lead switch
right axis deviation can be seen in this syndrome
Wolf - Parkinson -white or WPW syndrome
right axis deviation can be seen in left
Posterior fascicular block
Left axis deviation can be seen in
Left anterior hemiblock
Left axis deviation can be seen in what syndrome?
Hint; this syndrome also shows up in right axsis deviation.
WPW
Left axis deviation can be seen in inferior
Inferior myocardial infarction (Peri -infarction block)
Left axis deviation can be seen in ventricular
Ventricular tachycardia
Right axis deviation may be seen in
Pulmonary embolism
Right axis deviation is indicated if the QRS complexes are predominatly downward in
lead 1
Right axis deviation is common in
Healthy subjects particularly if they’re tall
Right axis deviation is not important in a tall person unless there it is some evidence of
Right ventricle hypertrophy or the patient has had an MI (which would raise suspicion for left posterior hemiblock).
Right ventricular hypertrophy is usually accompanied by
Right axis deviation
Right axis deviation is associated mainly with
Pulmonary conditions that put a strain on the right side of the heart. This includes congenital heart disorders
When the left ventricle becomes the hypertrophied, it exerts more influence on the QRS complex than the_____causing the axis to swing to the _____.
Right ventricle
Left
The QRS complex becomes predominately negative in
Lead three
Not significant until the QRS complex deflection is also predominately negative in
Lead two
Although left axis deviation can be due to excess influence of an enlarged ventricle, in fact this axis change is usually due to a
Conduction defect rather than to increased bulk of the left ventricular muscle.
The presence of axes deviation should alert you to look for
Signs of right and left ventricular hypertrophy
A change in the access to the bite may suggest a
Pulmonary embolism
But a change to the left may indicate
The conduction defect
Because the left ventricle contains more muscle in the right, it has more influence on
The cardiac axis but with
