HealthTap uses cookies to enhance your site experience and for analytics and advertising purposes. Normal sinus rhythm with right axis deviation. Borderline generally means that findings on a given test are in a range that, while not precisely normal, are not significantly abnormal either. LAD on the ECG may be caused by conduction problems like a block of the left anterior fascicular branch or left bundle branch block. Right axis deviation occurs when the QRS axis is shifted between 90 and 180 degrees. Left axis deviation is one of the most commonly encountered ECG abnormalities. Fascicular blocks occurdue toanatomical or functional block in a fascicle. This video demonstrates how to use the SOCRATES acronym when taking a history of pain or other symptoms. I just had a ecg and it said left axis deviation and a t wave abnormality. ECG Changes in a Patient Presenting With Chest Pain Secondary to Left-Sided Primary Spontaneous Pneumothorax: A Case Report-Based Literature Review. If LVH is caused by valvular abnormalities like aortic valve stenosis, the valve must be surgically repaired or replaced. Is my husband getting the right treatment? The patients with right axis deviation were younger and more likely to have atrial fibrillation. Roughly 7% of cases progress to bifascicular block (which means that the LAFB is accompanied by a right bundle branch block), while 3% progress to third-degree AV block (complete heart block). Adult electrodes will overlap and potentially cause inaccurate . [Left bu;ndle branch block with right axial deviation. The electrical axis will be shifted to the left (left axis deviation), ranging between -45 and -90. Left axis deviation: Left axis means on your ekg them sum of your electrical vectors from your heart was 0 to negative 90 degrees on the EKG. what is the difference between right and left axis deviation, The Top 5 Benefits of Owning a High-Quality Wheelchair, Top 10 Best Probiotics for Women's Gut Health (2022), Pseudonits (Hair Casts) | Symptoms, Causes, Treatments, and prevention, Mechanical Ventilation | Everything You Need to Know About It (with Pictures, Videos & FAQs), Ideal Body Proportions Calculator For Athlete. As in LAFB, the QRS duration will by prolonged by approximately 0.01 to 0.04 s, but totalQRS durationwill not reach 0.12 second. Block in the posteriorfascicle causes leftposteriorfascicular block (LPFB). P mitrale (bifid P waves) and left atrial enlargement are common P wave abnormalities. The bottom EKG shows a reading of a person with left anterior fascicular block (LAFB), previously thought to be benign but found by a UCSF-led team to potentially signal a serious heart condition. The electrical activity of the heart starts at the sinoatrialnode then spreads to the atrioventricular (AV)node. When the axis moves further and is more negative than 30 it is called marked left axis deviation (MLAD) and, on inspection of the tracing, can be diagnosed when in addition to the above features of LAD, the sum of QRS components is negative (ie S>R) in 2 and aVF as well as lead 3, while lead 1 is positive; (3) right . Left Anterior Fascicular Block in the Absence of Heart Disease. Figure 2 . The frequencies of glucose intolerance were 48.9% even in borderline LAD with 84.9% in moderate-to-marked LAD group. This site needs JavaScript to work properly. (= Left Axis Deviation, LAD) . A comprehensive collection of OSCE guides to common clinical procedures, including step-by-step images of key steps, video demonstrations and PDF mark schemes. One of the key steps in interpreting an electrocardiogram (EKG) is determining the electrical axis of the heart. This results in the deflection of lead III becoming negative (this is only considered significant if the deflection of lead II also becomes negative). Although not a dangerous finding in and of itself, axis deviation may be . Before This causes the deflection inlead I to becomenegative and the deflection inlead aVF/III to bemore positive. Until recently, it was believed that the human heart didnt have this capacity. 2023 Jan; 15(1):e33904. Build A Successful Homecare Business With These Tips. If your enlarged heart is due to a chronic (ongoing) condition, it usually will not go away. } Introduction: Heart failure. Check out our other awesome clinical skills resources including: LAFB occurs when the anterior fascicle of the left bundle branch is unable to conduct electrical signals. A research was carried out, and the results were that the development of left axis deviation in people of 40-59yr of age, independent of blood pressure is a significant predictor of ischemic heart disease events that are usually manifest 5-10yr after the onset of this electrocardiographic abnormality. Similarly, left posterior fascicular block is due to block in the posterior fascicle. Axis deviation indicates possible presence of various conditions. 2010 Mar;33(3):515-9. doi: 10.2337/dc09-1694. Establishing a diagnosis of LPFB requires that there are no clinical or ECG criteria of right ventricular hypertrophy present. Refer to Figure 1. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. There currently is no treatment for people with LAFB. The EKG measures the direction cannot say in your particular case, but generally, it means the the heart, electrically, is moved to the left. This can be a normal variant . INTRODUCTION. If, in contrast, the QRS complex in lead II is negative, this indicates a LAD. We are increasingly noticing isolated left axis deviation (LAD) in electrocardiogram in younger people with diabetes without obvious heart disease and association of LAD with glucose intolerance has not been explicitly raised before. Cardiac axis gives us an idea of the overall direction of electrical activity. Analytical cookies are used to understand how visitors interact with the website. By signing up, you agree to the our terms and our Privacy Policy agreement. National Library of Medicine Would you like email updates of new search results? Moderate-to-marked LAD group had higher frequencies of abnormal blood pressure (BP), FPG, and lipids than borderline LAD group even after conditioning effects of age and sex (p0.03) and of FPG after conditioning effects of BP (p=0.02). In the old DSM 4, which most still use, there are 5 Axes of mental health. This is reflected by a QRS complex positive in lead I and negative in leads aVF and II.. - 700+ OSCE Stations: https://geekymedics.com/osce-stations/ . The second vector is directed downwards and to the right, which results in a prominent R-wave in lead aVF and equally prominent S-wave in lead I. Causes can include left ventricular hypertrophy, left bundle branch block, left anterior fascicular block, inferior myocardial infarction, Wolff-Parkinson-White syndrome . The term "anteroseptal" refers to a location of the heart in front of the septum the wall of tissue that separates the left and right sides of the heart. Left-sided cardiac axis deviation is typically . What exactly is a P wave that is unusual? to decode the shape of the QRS complex based on the current knowledge of the ventricular . Your healthcare provider can use an electrocardiogram (EKG/ECG) to diagnose left atrial enlargement. It can be part of the criteria for LVH, but in isolation it has little significance. It is characterized by all of the following: left-axis deviation with frontal qrs axis between -45 degrees and -90 degrees; q wave in lead avl; rs in inferior leads ; qrs duration is ; 120 ms. For potential or actual medical emergencies, immediately call 911 or your local emergency service. Created for people with ongoing healthcare needs but benefits everyone. The cause of this axis change is unclear. DO NOT perform any examination or procedure on patients based purely on the content of these videos. Geeky Medics accepts no liability for loss of any kind incurred as a result of reliance upon the information provided in this video. The Isoelectric lead is another technique of measuring LAD that allows for a more exact calculation of the axis of the QRS. Left axis deviation by definition is a coronal QRS axis of more than -30 degrees. A careful history to elicit acute . what does this mean? The QRS duration is only slightly prolonged but it does not reach 0.12 s. Block in the anterior fascicle causes left anterior fascicular block (LAFB). This website follows the DNPA Code of Ethics, --------------------------------Advertisement---------------------------------- -. The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). Its presence should alert medical directors and underwriters to the possibility of underlying structural heart disease. (between -30 and -90 degrees) A right heart axis is present when lead I is negative and AVF positive. LeadsII, III andaVF displayrS complexes. 8600 Rockville Pike Secondly, there is a need to interpret the spectrum of QRS patterns seen in patients with LVH, such as such as the increased QRS voltage, the QRS voltage within normal limits, occurrence of left axis deviation and LBBB, in electro-physiological terms; i.e. Get prescriptions or refills through a video chat, if the doctor feels the prescriptions are medically appropriate. If the electrical axis falls between the values of -30 to +90 this is considered normal. Brenyo A, Rao M, Barsheshet A, Cannom D, Quesada A, McNitt S, Huang DT, Moss AJ, Zareba W. J Cardiovasc Electrophysiol. margin-right: 10px; You might also be interested in our awesome bank of 700+ OSCE Stations. Can I undergo another hernioplasty with my heart disease? V5V6 usually also shows qR complexes. . Performance indicators and validity of serum fructosamine assay as a diagnostic test in a screening program for diabetes mellitus. Multilead ST depression with coexistent ST elevation in lead aVR and V 1 has been described in patients with left main or . Left axis deviation = QRS axis between -30 to -90 degrees. . - Introduction 00:00 What does it mean? High blood pressure ( hypertension ). left side deviation ! and transmitted securely. An EKG/ECG is a representation of the electrical activity of the heart muscle as it changes with time. Falling out or a damage in the mitral valve region. The most common cause of RAD is right ventricular hypertrophy. Retrieved 2022-10-25. Among 67,375 Air Force men without symptoms, Hiss and associates found a frontal plane QRS axis of 30 to 90 degrees in 128 (1.9 percent). Marked LAD (45% or more) is called left anterior hemiblock or left anterior fascicular block. Note that left-axis deviation on the ECG may appear in both pregnant and obese patients. Q:What is left axis deviation reported in the ECG? Refer to Figure 1. These cookies will be stored in your browser only with your consent. Cardiovasc Diabetol. This test is performed on patients who present symptoms such as chest pain, heaviness in the chest, dizziness, or shortness of breath. If the electrical axis is -30 to -45. 2020 Aug 24;13:2975-2987. doi: 10.2147/DMSO.S263093. on both heart anatomy & how the electrical avtivation spreads from cell-to-cell with the atria, then within the ventricles. Type above and press Enter to search. DO NOT perform any examination or procedure on patients based purely on the content of these videos. Cumulative 10-year survival was 73.7% among patients with normal left atrial size, 62.5% among those with mild enlargement, 54.8% among those with moderate enlargement and 45% among those with severe enlargement (p < 0.001). And always remember that. Respiratory sinus arrhythmia is effectively benign, meaning that it is not harmful. I had a ekg and it said it was abnormal because of a left axis deviation. The prevalence of left-axis deviation (LAD) (QRS axis of -30 degrees or less) was not higher among those with greater measures of body fatness. First, analyze the QRS complex for both leads I and avF to determine if it is +ve (height of R wave > height of S wave), equiphasic (R wave = height of S wave), or negative (R wave height of S wave). Is your body's hormone capable of affecting your hunger pangs? Since right axis deviation is a new finding since the last EKG, a doctor may be playing it on the safe side when telling . The QRS axis is the most important to determine. } This field is for validation purposes and should be left unchanged. The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. A left heart axis is present when the QRS in lead I is positive and negative in II and AVF. . The normal variation that causes LAD is a physiologic alteration that occurs with age. Bookshelf My work mantra is: "I can, and I will", Are you looking for a way to calculate how many calories youve burned during your, Get the latest creative news from Healthsoothe about health and dentalcare. These cookies do not store any personal information. The abnormal left axis deviation is one of the most common abnormal ECG findings. I have just done a ecg and it came back with a left axis deviation and t wave abnormality. Left axis deviation is one of the most commonly encountered ECG abnormalities. There may be extreme axis deviation. One of the key steps in interpreting an electrocardiogram (ECG . An abnormal left axis deviation is a condition where the heart's electrical axis is shifted to the left. Video chat with a U.S. board-certified doctor 24/7 in less than one minute for common issues such as: colds and coughs, stomach symptoms, bladder infections, rashes, and more. HHS Vulnerability Disclosure, Help Comparison of The World Health Organization (WHO) two-step strategy and OGTT for diabetes mellitus screening. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. If LAD is present and the patient is . Unable to load your collection due to an error, Unable to load your delegates due to an error. What is the difference between hypoxemia and hypoventilation? Special interests in diagnostic and procedural ultrasound, medical education, and ECG interpretation. To learn more, please visit our. We also use third-party cookies that help us analyze and understand how you use this website. There's less contribution to the electrical vector from the left so it deviates to the right. I am a freelance writer and a computer techie who is adept in content writing, copy writing, article writing, essay writing, journal writing, blog posts, seminar presentation, SEO contents, proof reading, plagiarism checking, editing webpage contents&write-ups and WordPress management. - Associated symptoms 03:04 This is an example of why axis determination is an important part of 12-lead ECG interpretation. - Onset 01:48 Various conditions often shift the QRS axis without fulfilling the defined limits of deviations in the initial stage. Accessibility Can my father undergo mitral valve replacement? If the QRS complex in lead II is positive, this indicates a normal axis. But opting out of some of these cookies may have an effect on your browsing experience. This results in the deflection of lead III becoming negative (this is only considered significant if the deflection of lead II also becomes negative). Left anterior fascicular block. , . Results: Left axis points positive in the anterior leads and r Those terms describe the tracing. #mc_embed_signup { In these cases, your heart will return to its usual size after treatment. How to regulate it? If high blood pressure is the cause of LVH, medications such as diuretics, angiotensin receptor blockers (ARBs), beta-blockers, angiotensin-converting enzyme inhibitors (ACE inhibitors), and calcium channel blockers are used to lower blood pressure and prevent further enlargement of the left ventricle. Full answer is here. LAD on ECG may be caused by pre-excitation syndrome in addition to congenital cardiac abnormalities like atrial septal defect and endocardial cushion deficiencies. Left ventricular hypertrophy is more common in people who have uncontrolled high blood pressure. Among 67,375 Air Force men without symptoms, Hiss and associates found a frontal plane QRS axis of 30 to 90 degrees in 128 (1.9 percent). Left Axis Deviation = QRS axis less than -30. of axis deviation in the prehospital setting (for the most part) will not guide management too much but it is important to know the differential diagnoses of axis . As a result, a thorough history of acute cardiac injury is critical. sharing sensitive information, make sure youre on a federal For example, if LAD is caused by left ventricular hypertrophy. An official website of the United States government. Its probable relation to the so-called left anterior fascicular hemiblock]. The most common cause of RAD is right ventricular hypertrophy. It is mandatory to procure user consent prior to running these cookies on your website. Extra right ventricular tissue results in a stronger electrical signal being generated by the right side of the heart. - Character 02:14 Common causes of left axis deviation include an old or recent myocardial infarction, paced rhythms . A:Left axis deviation is usually a normal variation in the ECG in which the currents arising from the heart picked up by ECG have a leftward deviation. Non-specific Intraventricular Conduction Delay, Overview of Intraventricular Conduction Defects. They don't necessarily imply any anatomical or fuctional abnormality. Both terms relate to b What that means is the doctor who was "caring" for you has not been very pleasant or helpful. Electrical axis between-45to-90. border: none; If you'd like to support us, check out our awesome products: You don't need to tell us which article this feedback relates to, as we automatically capture that information for you. Undefined cookies are those that are being analyzed and have not been classified into a category as yet. 1996;(12):282-4. Would you like email updates of new search results? Inferior wall myocardial infarction, left ventricular hypertrophy, The symptoms of left axis deviation are determined by the underlying reason. With poor R wave progression the transition comes later than it should. eCollection 2020. Please note, we cannot prescribe controlled substances, diet pills, antipsychotics, or other abusable medications. Do I need to change medicines after angioplasty? It occurs when a persons heart rate relates to their breathing cycle. - Geeky Medics OSCE App: https://geekymedics.com/geeky-medics-app/ - Examples 05:45 Try Ayurveda And Don't Ignore It, Nutritionist Lovneet Batra Outlines The Many Health Benefits Of Ginger, Building Immunity In Winter With The Goodness Of Herbs, Skincare Tips: Get Glowing Skin This Festive Season With These Ayurvedic Tips. Feel free to contact us at [emailprotected] if you have further questions to ask or if theres anything you want to contribute or correct to this article. 1983 Mar;131(3):150-6. If there is sinus rhythm, and the heart rate is greater than 100 bpm, then sinus tachycardia is present. There currently is no treatment for people with LAFB. Always adhere to medical school/local hospital guidelines when performing examinations or clinical procedures. Retrieved 2022-10-25., ventricular ectopic arrhythmias, congenital cardiac disease, preexcitation syndrome, pacemaker-generated paced rhythm, conduction abnormalities, mechanical shift, emphysema, normal variation, and hyperkalemia are all examples of these. Check out our NEW & IMPROVED quiz platform at geekyquiz.com, To be the first to know about our latest videos subscribe to our YouTube channel . ECG criteria for left posterior fascicular block (LPFB) Electrical axis +90 to +180. Sometimes, left bundle branch block has no known cause. display: inline; Electrocardiography. Join the Geeky Medics community: Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with SunAgri and INRAE in Avignon between 2019 and 2022. - Timing 03:23 So, anytime, you need trustworthy answers to any of your health-related questions, come straight to us, and we will solve your problem(s) for you. - Over 3000 Free MCQs: https://geekyquiz.com/ This is reflected by a QRS complex positive in lead I and negative in leads aVF and II. Clinical electrocardiography and ECG interpretation, Cardiac electrophysiology: action potential, automaticity and vectors, The ECG leads: electrodes, limb leads, chest (precordial) leads, 12-Lead ECG (EKG), The Cabrera format of the 12-lead ECG & lead aVR instead of aVR, ECG interpretation: Characteristics of the normal ECG (P-wave, QRS complex, ST segment, T-wave), How to interpret the ECG / EKG: A systematic approach, Mechanisms of cardiac arrhythmias: from automaticity to re-entry (reentry), Aberrant ventricular conduction (aberrancy, aberration), Premature ventricular contractions (premature ventricular complex, premature ventricular beats), Premature atrial contraction(premature atrial beat / complex): ECG & clinical implications, Sinus rhythm: physiology, ECG criteria & clinical implications, Sinus arrhythmia (respiratory sinus arrhythmia), Sinus bradycardia: definitions, ECG, causes and management, Chronotropic incompetence (inability to increase heart rate), Sinoatrial arrest & sinoatrial pause (sinus pause / arrest), Sinoatrial block (SA block): ECG criteria, causes and clinical features, Sinus node dysfunction (SND) and sick sinus syndrome (SSS), Sinus tachycardia & Inappropriate sinus tachycardia, Atrial fibrillation: ECG, classification, causes, risk factors & management, Atrial flutter: classification, causes, ECG diagnosis & management, Ectopic atrial rhythm (EAT), atrial tachycardia (AT) & multifocal atrial tachycardia (MAT), Atrioventricular nodal reentry tachycardia (AVNRT): ECG features & management, Pre-excitation, Atrioventricular Reentrant (Reentry) Tachycardia (AVRT), Wolff-Parkinson-White (WPW) syndrome, Junctional rhythm (escape rhythm) and junctional tachycardia, Ventricular rhythm and accelerated ventricular rhythm (idioventricular rhythm), Ventricular tachycardia (VT): ECG criteria, causes, classification, treatment, Long QT (QTc) interval, long QT syndrome (LQTS) & torsades de pointes, Ventricular fibrillation, pulseless electrical activity and sudden cardiac arrest, Pacemaker mediated tachycardia (PMT): ECG and management, Diagnosis and management of narrow and wide complex tachycardia, Introduction to Coronary Artery Disease (Ischemic Heart Disease) & Use of ECG, Classification of Acute Coronary Syndromes (ACS) & Acute Myocardial Infarction (AMI), Clinical application of ECG in chest pain & acute myocardial infarction, Diagnostic Criteria for Acute Myocardial Infarction: Cardiac troponins, ECG & Symptoms, Myocardial Ischemia & infarction: Reactions, ECG Changes & Symptoms, The left ventricle in myocardial ischemia and infarction, Factors that modify the natural course in acute myocardial infarction (AMI), ECG in myocardial ischemia: ischemic changes in the ST segment & T-wave, ST segment depression in myocardial ischemia and differential diagnoses, ST segment elevation in acute myocardial ischemia and differential diagnoses, ST elevation myocardial infarction (STEMI) without ST elevations on 12-lead ECG, T-waves in ischemia: hyperacute, inverted (negative), Wellen's sign & de Winter's sign, ECG signs of myocardial infarction: pathological Q-waves & pathological R-waves, Other ECG changes in ischemia and infarction, Supraventricular and intraventricular conduction defects in myocardial ischemia and infarction, ECG localization of myocardial infarction / ischemia and coronary artery occlusion (culprit), The ECG in assessment of myocardial reperfusion, Approach to patients with chest pain: differential diagnoses, management & ECG, Stable Coronary Artery Disease (Angina Pectoris): Diagnosis, Evaluation, Management, NSTEMI (Non ST Elevation Myocardial Infarction) & Unstable Angina: Diagnosis, Criteria, ECG, Management, STEMI (ST Elevation Myocardial Infarction): diagnosis, criteria, ECG & management, First-degree AV block (AV block I, AV block 1), Second-degree AV block: Mobitz type 1 (Wenckebach) & Mobitz type 2 block, Third-degree AV block (3rd degree AV block, AV block 3, AV block III), Management and treatment of AV block (atrioventricular blocks), Intraventricular conduction delay: bundle branch blocks & fascicular blocks, Right bundle branch block (RBBB): ECG, criteria, definitions, causes & treatment, Left bundle branch block (LBBB): ECG criteria, causes, management, Left bundle branch block (LBBB) in acute myocardial infarction: the Sgarbossa criteria, Fascicular block (hemiblock): left anterior & left posterior fascicular block on ECG, Nonspecific intraventricular conduction delay (defect), Atrial and ventricular enlargement: hypertrophy and dilatation on ECG, ECG in left ventricular hypertrophy (LVH): criteria and implications, Right ventricular hypertrophy (RVH): ECG criteria & clinical characteristics, Biventricular hypertrophy ECG and clinical characteristics, Left atrial enlargement (P mitrale) & right atrial enlargement (P pulmonale) on ECG, Digoxin - ECG changes, arrhythmias, conduction defects & treatment, ECG changes caused by antiarrhythmic drugs, beta blockers & calcium channel blockers, ECG changes due to electrolyte imbalance (disorder), ECG J wave syndromes: hypothermia, early repolarization, hypercalcemia & Brugada syndrome, Brugada syndrome: ECG, clinical features and management, Early repolarization pattern on ECG (early repolarization syndrome), Takotsubo cardiomyopathy (broken heart syndrome, stress induced cardiomyopathy), Pericarditis, myocarditis & perimyocarditis: ECG, criteria & treatment, Eletrical alternans: the ECG in pericardial effusion & cardiac tamponade, Exercise stress test (treadmill test, exercise ECG): Introduction, Indications, Contraindications, and Preparations for Exercise Stress Testing (exercise ECG), Exercise stress test (exercise ECG): protocols, evaluation & termination, Exercise stress testing in special patient populations, Exercise physiology: from normal response to myocardial ischemia & chest pain, Evaluation of exercise stress test: ECG, symptoms, blood pressure, heart rate, performance, ECG criteria for left anterior fascicular block (LAFB), Causes of left anterior fascicular block (LAFB), Prognosis of left anterior fascicular block (LAFB), Noteworthy about left anterior fascicular block (LAFB), ECG criteria for left posterior fascicular block (LPFB), Causes of left posterior fascicular block (LPFB), Causes ofleft anterior fascicular block (LAFB), Prognosis ofleft anterior fascicular block (LAFB), Noteworthy aboutleft anterior fascicular block (LAFB), Causes ofleft posterior fascicular block (LPFB). Left-axis deviation is when the QRS axis is between -30 and -90. Hence it is a 4 axis system that acts as A left axis may be normal for you, or may indicate some thickening of your left ventricle. Left Axis Deviation = QRS axis less than -30. Which can be benign or portend something more seriousConsult with your physician. The thickened left ventricle becomes weak and stiff. I am currently continuing at SunAgri as an R&D engineer. These cookies track visitors across websites and collect information to provide customized ads. Installing uses almost no storage and provides a quick way to return to this app. Weakened or stiffened heart muscle ( cardiomyopathy ). The associations with various conditions may be . Before Clinic and electro-vectorcardiographic study (author's transl)]. Methods: margin-top: 20px; The top EKG shows a reading of a person with a healthy heart. - Radiation 02:45 In case of a fascicular block, the wall/walls without fascicular supply will depend on impulses spreading from the other part of the ventricle (where the fascicle is intact). Left axis deviation (LAD) discovered in children via electrocardiogram (ECG) is uncommon but can be associated with heart disease (HD). An abnormal ECG might indicate a variety of conditions. In this condition there is a swing of the cardiac axis to the left - ie less than minus 30 degrees. Top answers from doctors based on your search: Created for people with ongoing healthcare needs but benefits everyone. The left bundle branch is subdivided into the following two fascicles: (1)the anterior (anterosuperior) fascicle, whichdelivers the electrical impulse to the anterior wall of the left ventricle; (2)the posterior (posteroinferior) fascicle, whichdelivers the electrical impulse to the posterior and inferiorwalls of the left ventricle. Left Axis Deviation = QRS axis less than -30. clear: left; 2004 Jan-Mar;36(1):3-7. Sometimes an ECG abnormality is a normal variation of a hearts rhythm, which does not affect your health. It may indicate the presence of various conditions, such as left ventricular hypertrophy, left anterior fascicular block, inferior wall myocardial infarction, emphysema, and mechanical shift due to elevated diaphragm because of obesity. The symptoms of left axis deviation are determined by the underlying reason. Wanted to please understand what this left axis deviation means and if it's normal. This site uses Akismet to reduce spam. In electrocardiography, the cardiac axis is the total of the depolarization vectors created by each cardiac myocyte.