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'''Left Axis Deviation''' is a condition related to the electrical activity of the [[heart]]. It is often identified through an [[Electrocardiography|electrocardiogram]] (ECG), which measures the heart's electrical conduction system.
== Left Axis Deviation ==


== Overview ==
[[File:Left_axis_deviation_hexaxial_reference_system.svg|thumb|right|Diagram illustrating left axis deviation on the hexaxial reference system.]]


Left Axis Deviation (LAD) is a term used in the field of [[Cardiology|cardiology]] to describe the change in the electrical axis of the heart. This deviation is typically between -30 and -90 degrees. It is often associated with various cardiac conditions such as [[Left Ventricular Hypertrophy|left ventricular hypertrophy]], [[Inferior Myocardial Infarction|inferior myocardial infarction]], and [[Wolff-Parkinson-White Syndrome|Wolff-Parkinson-White syndrome]].
'''Left axis deviation''' (LAD) is a condition in which the electrical axis of the heart is deviated to the left. This is typically identified on an [[electrocardiogram]] (ECG) and is characterized by an axis that is more negative than -30 degrees.


== Causes ==
== Causes ==


The causes of Left Axis Deviation can be physiological or pathological. Physiological causes include [[Athletic Heart Syndrome|athletic heart syndrome]] and natural aging. Pathological causes include conditions such as [[Heart Block|heart block]], [[Cardiomyopathy|cardiomyopathy]], and [[Myocardial Infarction|myocardial infarction]].
Left axis deviation can be caused by a variety of conditions, including:
 
* [[Left ventricular hypertrophy]]
* [[Left bundle branch block]]
* [[Inferior myocardial infarction]]
* [[Wolff-Parkinson-White syndrome]]
* [[Congenital heart disease]]


== Diagnosis ==
== Diagnosis ==


Diagnosis of Left Axis Deviation is typically made through an [[Electrocardiogram|electrocardiogram]] (ECG). The ECG will show a deviation of the electrical axis to the left of the normal axis. Other diagnostic tests may include [[Echocardiography|echocardiography]] and [[Cardiac MRI|cardiac MRI]].
The diagnosis of left axis deviation is made using an [[electrocardiogram]]. The electrical axis is determined by analyzing the QRS complex in the limb leads. In left axis deviation, the QRS complex is predominantly negative in lead II and positive in lead I.


== Treatment ==
== Clinical Significance ==


Treatment for Left Axis Deviation depends on the underlying cause. If the deviation is due to a heart condition, treatment may include medication, lifestyle changes, or in some cases, surgery. It is important to consult with a [[Cardiologist|cardiologist]] for appropriate treatment options.
Left axis deviation itself is not a disease but rather a sign that may indicate underlying cardiac pathology. It is important for clinicians to evaluate the patient for potential causes of LAD and to assess the overall clinical context.


== See Also ==
== Management ==


* [[Right Axis Deviation]]
Management of left axis deviation involves addressing the underlying cause. For example, if LAD is due to left ventricular hypertrophy, treatment may focus on managing hypertension or other contributing factors.
* [[Electrocardiography]]
 
* [[Cardiology]]
== Related Pages ==
 
* [[Electrocardiogram]]
* [[Cardiac axis]]
* [[Left ventricular hypertrophy]]
* [[Bundle branch block]]
 
{{Cardiology}}


[[Category:Cardiology]]
[[Category:Cardiology]]
[[Category:Medical Conditions]]
[[Category:Electrocardiography]]
{{stub}}

Revision as of 16:27, 16 February 2025

Left Axis Deviation

File:Left axis deviation hexaxial reference system.svg
Diagram illustrating left axis deviation on the hexaxial reference system.

Left axis deviation (LAD) is a condition in which the electrical axis of the heart is deviated to the left. This is typically identified on an electrocardiogram (ECG) and is characterized by an axis that is more negative than -30 degrees.

Causes

Left axis deviation can be caused by a variety of conditions, including:

Diagnosis

The diagnosis of left axis deviation is made using an electrocardiogram. The electrical axis is determined by analyzing the QRS complex in the limb leads. In left axis deviation, the QRS complex is predominantly negative in lead II and positive in lead I.

Clinical Significance

Left axis deviation itself is not a disease but rather a sign that may indicate underlying cardiac pathology. It is important for clinicians to evaluate the patient for potential causes of LAD and to assess the overall clinical context.

Management

Management of left axis deviation involves addressing the underlying cause. For example, if LAD is due to left ventricular hypertrophy, treatment may focus on managing hypertension or other contributing factors.

Related Pages



Cardiovascular disease A-Z

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