Left Anterior Fascicular Block

Left-sided heart diseases, aging, and myocardial fibrosis are causes of the left anterior fascicular block (LAFB). It is a disturbance or delay in the ventricular conduction of the heart or left anterior fascicle in specific.

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Kindly interpret my ECG.

Query: Hi doctor, My ECG report showed left axis deviation, left anterior fascicular block and prolonged QT interval. Is this an abnormal ECG? What kind of health issue I am having? I am a 48 year old female. Also, I am diabetic since four years.  Read Full »


Dr. Rishu

Answer: Hi, Welcome to icliniq.com. Left ventricular hypertrophy is the most important cause of left axis deviation and left anterior fascicular block. Hypertension (high blood pressure) can very often result in left ventricular hypertrophy causing left axis deviation. QT prolongation can be because of many...  Read Full »

My ECG shows left anterior fascicular block. What has to be done?

Query: Hello doctor, Yesterday, I got my ECG done. It shows sinus rhythm, abnormal left axis deviation, left anterior fascicular block. I am worried. I have long-term anxiety about heart. I am a smoker but not alcoholic. I always have a fear of heart disease. Kindly advice. My BP is 110/70 mmHg, triglycer...  Read Full »


Dr. Mahmoud Ahmed Abelrahman Abouibrahim

Answer: Hi,Welcome to icliniq.com.Left anterior fascicular block is always associated with left axis deviation and caused by either hypertension, myocardial infarction or idiopathic fibrosis. This block means that the pathway of electricity of the heart in the left ventricle is blocked which may or may not ...  Read Full »

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