Lead aVL
Electrocardiography (ECG or EKG from Greek: kardia, meaning heart) is the recording of the electrical activity of the heart. Traditionally this is in the form of a transthoracic (across the thorax or chest) interpretation of the electrical activity of the heart over a period of time, as detected by electrodes attached to the surface of the skin and recorded or displayed by a device external to the body. The recording produced by this noninvasive procedure is termed an electrocardiogram (also ECG or EKG). It is possible to record ECGs invasively using an implantable loop recorder.
An ECG is used to measure the heart’s electrical conduction system. It picks up electrical impulses generated by the polarization and depolarization of cardiac tissue and translates into a waveform. The waveform is then used to measure the rate and regularity of heartbeats, as well as the size and position of the chambers, the presence of any damage to the heart, and the effects of drugs or devices used to regulate the heart, such as a pacemaker.
Most ECGs are performed for diagnostic or research purposes on human hearts, but may also be performed on animals, usually for diagnosis of heart abnormalities or research.

This is an excerpt from the article Lead aVL from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.
The article Lead aVL at en.wikipedia.org was accessed 34 times in the last 30 days. (as of: 05/18/2014)
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Electrocardiography - Wikipedia, the free encyclopedia
In a 12-lead ECG, all leads except the limb leads are unipolar (aVR, aVL, aVF, V 1 ... Leads aVR, aVL, and aVF are augmented limb leads (after their inventor Dr.
en.wikipedia.org/wiki/Electrocardiography
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Field 12 Lead ECG Diagnosis - Public Safety Net
Sep 3, 1997 ... Lead aVL faces the heart from the left shoulder and is oriented to the Left Ventriacle. Lead aVF face the heart from the left hip and is oriented to ...
www.publicsafety.net/12lead_dx.htm
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aVL lead - Medical Dictionary - The Free Dictionary
lead (Pb) (led) a chemical element, at. no. 82. Absorption or ingestion causes poisoning, which affects the brain, nervous and digestive systems, and blood.
medical-dictionary.thefreedictionary.com/aVL+lead
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Interpretation EKG
There are three general guidelines to diagnose left ventricular hypertrophy: R wave height in AVL > 11 mm, R wave height in Lead I plus the S wave depth in ...
www.unm.edu/~lkravitz/EKG/interpekg.html
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Anterior ST elevation myocardial Infarction (STEMI)
The magnitude of the reciprocal change in the inferior leads is determined by the magnitude of the ST elevation in I and aVL (as these leads are electrically ...
lifeinthefastlane.com/ecg-library/anterior-stemi/
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ECG Limb Lead Reversals - Life in the Fast Lane ECG Library
Jan 10, 2012 ... Bipolar leads: I, II, III; Augmented unipolar leads: aVL, aVF, aVR; Wilson's central terminus (WCT): the 'zero' lead, produced by averaging ...
lifeinthefastlane.com/ecg-library/limb-lead-reversals/
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Lateral STEMI - Life in the Fastlane ECG Library
Reciprocal change in the inferior leads is only seen when there is ST elevation in leads I and aVL. This reciprocal change may be obliterated when there is ...
lifeinthefastlane.com/ecg-library/lateral-stemi/
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Inferior STEMI - Life in the Fastlane ECG Library
The concept of reciprocal change can be further highlighted by taking Lead aVL and inverting it… see how the ST morphology now looks identical to lead III.
lifeinthefastlane.com/ecg-library/basics/inferior-stemi/
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Basic Electrocardiography
Limb Leads: I, II, III, aVR, aVL, aVF explore the electrical activity in the heart in a frontal plane; i.e., the orientation of the heart seen when looking directly at the ...
www.sh.lsuhsc.edu/fammed/outpatientmanual/basicecg.htm
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AVL - What does AVL stand for? Acronyms…
Acronym Definition; AVL: Automatic Vehicle Location: AVL: Available: AVL: Alabama Virtual Library: AVL: Acadèmia Valenciana de La Llengua (Spanish academy) AVL
acronyms.thefreedictionary.com/AVL
Search results for "Lead aVL"
Google: approx. 1.570.000
Lead aVL in science
Standard 12 Lead ECG - Sitemaker - University of Michigan
Augemented limb leads (aVL, aVR, aVF) are unipolar limb leads, containing only a positive pole. aVL is designated at -30 degrees, aVF at 90 degrees, and lead ...
8. Ventricular Hypertrophy - ECG Learning Center - An introduction ...
R in aVL ≥ 11 mm or, if left axis deviation, R in aVL ≥ 13 mm plus S in III ≥ 15 mm; R in I + S in III > 25 mm. Chest-lead voltage criteria: S in V1 + R in V5 or V6 ...
Diagnostic Value of Electrocardiographic T Wave Inversion in Lead ...
2Department of Medicine, Cardiology Unit, Sultan Qaboos University, Al-Khod ... The clinical value of T wave inversion in Lead aVL in diagnosing coronary artery ...
ST segment depression in aVL: a sensitive marker for acute inferior ...
ST segment depression in aVL: a sensitive marker for acute inferior myocardial infarction. Y. BIRNBAUM ... In many of them, ST depression is found in leads oriented to remote segments of the heart. .... Oxford Journals Oxford University Press.
Inverted p wave in lead I and the - University of Glasgow
An almost flat (isoelectric) signal. in Lead II caused. by right arm and right leg electrodes being interchanged. Note aVL, aVF and V1-V6 may also be affected.
EKG Basics - Jan.ucc.nau.edu
For any lead, the EKG machine looks at specific combinations of leads in order to configure the tracing we expect to see for Lead I, II, III, aVF, aVL, aVR or for ...
aVL lead - Medical Dictionary - The Free Dictionary
Definition of aVL lead in the Medical Dictionary. aVL lead explanation. Information about aVL lead in Free online English dictionary. What is aVL lead? Meaning ...
Bipolar Leads - University of Nottingham
Skip Navigation. The University of Nottingham's website ... information between AVr and AVl is known as lead l. Information between AVr and AVf is known as ...
Early Subtle Warnings - University of Colorado Denver
University of Colorado School of Medicine. A-Z Index | School of ... ST-segment depressions in Lead aVL (and often in lead I) may appear early in IMI. In fact ...
Electrocardiography - Wikipedia, the free encyclopedia
Leads aVR, aVL, and aVF are augmented limb leads (after their inventor Dr. ..... Practice Learning – Division of Nursing – The University of Nottingham".
Books on the term Lead aVL
Sensible Analysis of the 12-lead ECG
Sensible Analysis of the 12-lead ECG
Kathryn Monica Lewis, Kathleen A. Handal, 2000
LeadaVL In Lead aVL, the electrode on the left arm is positive while the electrode on the right arm and left leg determines the neutral reference point. Lead aVL visualizes the left lateral wall of the heart. Lead aVL is usually positive and ...
Rapid Interpretation of EKG's, Sixth Edition
Rapid Interpretation of EKG's, Sixth Edition
Dale Dubin, 2000
The reader's rapid assimilation of medical concepts is the key to the continuing success of this best-selling book. A caption explains the concept illustrated on each page, and a few simple sentences reinforce the concept with interactive (programmed) learning, which links to the following page. Dr. Dubin's light and entertaining style, k...
Twelve-Lead Electrocardiography: Theory and Interpretation
Twelve-Lead Electrocardiography: Theory and Interpretation
D. Bruce Foster, 2007
Lead aVL is the lead that is normally the most perpendicular to Vector 3, which is the vector of main ventricular depolarization. If the direction of vector 3 is +60 degrees and aVL is looking at the vector from −30 degrees, then aVL is at exactly a ...
Step-Up to Medicine (Step-Up Series)
Step-Up to Medicine (Step-Up Series)
2012
Step-Up to Medicine is your lifeline for the clinical years of medical school. This book was originally written by third-year medical students searching for the perfect review book—not finding it on the market, they wrote it themselves! Now in its third edition, Step-Up to Medicine boils down the full scope of tested pathology in a single ingenious...
Multiple Lead ECGs: A Practical Analysis of Arrhythmias: A ...
Multiple Lead ECGs: A Practical Analysis of Arrhythmias: A ...
Kathryn M. Lewis, 2009
The a in leads aVR, aVL, and aVF stands for augmented or amplified, so named because these leads are automatically set ... Lead aVL visualizes the left lateral wall of the heart. Lead aVL is usually positive and sometimes diphasic. Lead aVF .
First Aid for the USMLE Step 2 CK, Eighth Edition (First Aid USMLE)
First Aid for the USMLE Step 2 CK, Eighth Edition (First Aid USMLE)
Vikas Bhushan, 2012
An indispensable high-yield review for the USMLE Step 2 CK! The eighth edition of First Aid for the USMLE Step 2 CK is written by medical students who successfully passed the exam and reviewed by top faculty. The result is proven information and strategies that maximize your study time and deliver the results you want! Features:Thousands of must-kn...
Investigative Electrocardiography in Epidemiological Studies ...
Investigative Electrocardiography in Epidemiological Studies ...
Pentti Rautaharju, Farida Rautaharju, 2007
WCT is at the intersection of the lines connecting the half points of lead vectors I, II and III to the corners of the lead vector triangle. WCT is also the point of intersection of lead vectors aVR, aVL and aVF. Note that the lead vectors of Wilson's ...
USMLE Step 2 Secrets, 3e
USMLE Step 2 Secrets, 3e
2010
USMLE Step 2 Secrets is an easy-to-read review perfect for busy students like you. Adam Brochert, MD-who scored in the 99th percentile on the Step 2 USMLE-and Theodore X. O'Connell, MD-author of several review and clinical reference books-present essential questions and answers covering the important concepts you need to know to score well on ...
Basic and Bedside Electrocardiography
Basic and Bedside Electrocardiography
Romulo F. Baltazar, 2012
Figure 4.4: Perpendicular Leads. In the frontal plane, the following leads are perpendicular to each other: Leads I and aVF (A), Leads II and aVL (B) and lead III and aVR (C). Leads I and aVF 180' aVF + 90° Leads II and aVL -120r +150' Leads ...
Introduction to Critical Care Nursing, 6e (Sole, Introduction to Critical Care Nursing)
Introduction to Critical Care Nursing, 6e (Sole, Introduction to Critical Care Nursing)
2012
User-friendly and easy to understand, Introduction to Critical Care Nursing, 6th Edition offers clear, concise coverage of essential critical care concepts, technology, and procedures. Completely updated, evidence-based content addresses the latest advances in high-acuity care and emphasizes patient safety and optimum patient outcomes. Plus, an abu...
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Blog posts on the term
Lead aVL
ALiEM – Academic Life in Emergency Medicine – The Importance of Reciprocal Changes in Lead aVL
academiclifeinem.com/the-importance-of-reciprocal-changes-in-lead-avl/
Fall 2013 AVL Championship
» Fall 2013 AVL Championship | Chicago, IL
assyrianvolleyballleague.com/fall-2013-avl-championship/
AVL WA Round 2: Match Report - vwa
www.volleyballwa.com.au/?p=1876
Bundle Branch Blocks:101 | R.E.B.E.L. EM
Follow @srrezaie Recently, I have been asked by several students at my home institution (UTHSC at San Antonio) to help them understand bundle branch blocks. This is different than some of my usual posts because it is meant to be more educational than evidence based.
rebelem.com/bundle-branch-blocks101/
37 Year Old Male–CC: Chest Pain, Part II | EMS 12-Lead
Tweet This is part II to "37 year old male–CC: Chest Pain". You may wish to review the case.
ems12lead.com/2013/11/37-year-old-male-cc-chest-pain-part-ii/
Dr. Smith's ECG Blog: Inferior and Lateral ST Elevation and A Positive Troponin
A young woman presented with substernal chest pain described as both crushing and stabbing, with radiation to the jaw and left arm and associated with dyspnea. It was not positional or pleuritic.
hqmeded-ecg.blogspot.com/2013/10/inferior-and-lateral-st-elevation.html
ECG Solution: A horse or a zebra?
This is the solution to the ECG Challenge: A horse or a zebra? You may wish to go back and review the history and clinical presentation. Let s take another look at the initial 12-lead ECG. Any time I
www.ems1.com/columnists/Tom-Bouthillet/articles/1594091-ECG-Solution-A-horse-or-a-zebra/
"Optimal electrocardiographic limb lead set for rapid emphysema screeni" by Rishi Bajaj, Lovely Chhabra et al.
BACKGROUND: Pulmonary emphysema of any etiology has been shown to be strongly and quasidiagnostically associated with a vertical frontal P wave axis. A vertical P wave axis (>60 degrees) during sinus rhythm can be easily determined by a P wave in lead III greater than the P wave in lead I (bipolar lead set) or a dominantly negative P wave in aVL (unipolar lead set). The purpose of this investigation was to determine which set of limb leads may be better for identifying the vertical P vector of emphysema in adults. METHODS: Unselected consecutive electrocardiograms from 100 patients with a diagnosis of emphysema were analyzed to determine the P wave axis. Patients aged younger than 45 years, those not in sinus rhythm, and those with poor quality tracings were excluded. The electrocardiographic data were divided into three categories depending on the frontal P wave axis, ie, >60 degrees, 60 degrees, ordegrees, by each criterion (P amplitude lead III > lead I and a negative P wave in aVL). RESULTS: Sixty-six percent of patients had a P wave axis > 60 degrees based on aVL, and 88% of patients had a P wave axis > 60 degrees based on the P wave in lead III being greater than in lead I. CONCLUSION: A P wave in lead III greater than that in lead I is a more sensitive marker than a negative P wave in aVL for diagnosing emphysema and is recommended for rapid routine screening.
escholarship.umassmed.edu/faculty_pubs/218/
Amal Mattu's Emergency ECG Video of the Week
Subtle ECG changes that matter Episode 109 September 30, 2013 For the 2nd week in a row, an astute resident saves the day! New T-wave inversion in aVL may be a reciprocal change! • Reciprocal...
ekgumem.tumblr.com/post/62703420048/subtle-ecg-changes-that-matter-episode
Arsenal lead chase for FC Basel youngster | talkSPORT
Arsenal are heading a queue of European clubs chasing FC Basel youngster Fabian Schar. talkSPORT told you back in September that Arsene Wenger is an admirer of Schar, who has become a key player for the Swiss champions since switching from FC Wil in 2012. But the Gunners are believed to have ramped up their interest in recent weeks and could make an offer for the 21-year-old as early as January.
talksport.com/football/arsenal-lead-chase-fc-basel-youngster-13103166187
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