What is the axis on ECG?

The axis of the ECG is the major direction of the overall electrical activity of the heart. It can be normal, leftward (left axis deviationleft axis deviationLeft 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.

What is normal axis in ECG?

Electrocardiographic axis. Normal axis is between -30º and 90º; left axis deviation (LAD) is between -30º and – 90º; right axis deviation (RAD) is between 90º and 180º; extreme axis deviation (EAD) (left or right) is between -90º and -180º. The electrical axis can be estimated from the standard frontal leads.

What does axis deviation on ECG mean?

In electrocardiography, left axis deviation (LAD) is a condition wherein the mean electrical axis of ventricular contraction of the heart lies in a frontal plane direction between −30° and −90°. This is reflected by a QRS complex positive in lead I and negative in leads aVF and II.

Why does Axis matter on EKG?

Whenever the direction of electrical activity is towards a lead you get a positive deflection in that lead. Whenever the direction of electrical activity is away from a lead you get a negative deflection in that lead. Cardiac axis gives us an idea of the overall direction of electrical activity.

What is abnormal P axis?

Abnormal P-wave axis is defined as any value outside 0–75° (Figure 1) (31).

What is abnormal ECG reading?

An abnormal EKG can mean many things. Sometimes an EKG abnormality is a normal variation of a heart’s rhythm, which does not affect your health. Other times, an abnormal EKG can signal a medical emergency, such as a myocardial infarction (heart attack) or a dangerous arrhythmia.

How serious is left axis deviation?

In conclusion, among patients with left bundle branch block, those with left axis deviation have a greater incidence of myocardial dysfunction, more advanced conduction desease and greater cardiovascular mortality than those with a normal axis.

Why is axis deviation important?


Cardiac axis is the net direction of electrical activity during depolarization. In a healthy heart the net movement is downward and slightly. Left this axis is altered or deviated.

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 are good ECG numbers?

The normal range of the ECG differed between men and women: heart rate 49 to 100 bpm vs. 55 to 108 bpm, P wave duration 81 to 130 ms vs. 84 to 130 ms, PR interval 119 to 210 ms vs. ms, QRS duration 74 to 110 ms vs.

Can ECG detect heart blockage?

An ECG Can Recognize the Signs of Blocked Arteries. But for further accurecy a CT coronary angiogram can reveal plaque buildup and identify blockages in the arteries, which can lead to a heart attack.

Does anxiety cause abnormal ECG?

Abnormal ECG Findings Caused by Anxiety



In patients without a known clinical history of anxiety or other mental health concerns, short-term nervousness can also disrupt ECG readings. In one case study from the Egyptian Journal of Critical Care Medicine, such apprehension led to reported quadrigeminy in all ECG leads.

Can high blood pressure cause abnormal ECG?

High blood pressure



Other aspects of heart disease may lead to an abnormal EKG. For example, people with high blood pressure are more likely to have an abnormal EKG reading.

What does tachycardia feel like?

In general, tachycardia may lead to the following signs and symptoms: Sensation of a racing, pounding heartbeat or flopping in the chest (palpitations) Chest pain. Fainting (syncope)