What causes heart axis deviation?
Some of the causes include normal variation, thickened left ventricle, conduction defects, inferior wall myocardial infarction, pre-excitation syndrome, ventricular ectopic rhythms, congenital heart disease, high potassium levels, emphysema, mechanical shift, and paced rhythm.
Does left axis deviation mean heart disease?
The results were that the development of left axis deviation in men 40 to 59 yr of age, independent of blood pressure is a significant predictor of ischemic heart disease events that are usually manifest 5 to 10 yr after the onset of this electrocardiographic abnormality.
What is the most common cause of left axis deviation?
Left anterior fascicular block (LAFB): LAFB probably is the most common cause of left axis deviation and is common in persons without overt cardiac disease.
Is left axis deviation life threatening?
Although not a dangerous finding in and of itself, axis deviation may be an indication of a serious underlying condition. A careful history to elicit acute cardiac injury is therefore of utmost importance.
What is a normal QRS axis?
The normal adult QRS axis is between -30 degrees and +90 degrees, which is directed downward and to the left. This adult range is sometimes extended from -30 degrees to +100 degrees.
Does hypertension cause left axis deviation?
The patients with left axis deviation were older, were more often men, and were more likely to have hypertension, dyslipidemia, ischemic heart disease, and a high LV mass index than those with normal axis (Table 1). The patients with right axis deviation were younger and more likely to have atrial fibrillation.
What conditions cause left axis deviation?
Left axis deviation occurs when the QRS axis falls between -30 and -90. There are a variety of causes, including left anterior fascicular block and left ventricular hypertrophy. See the ECG basics section on determining axis for details.