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Left Axis Deviation

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1. Left Axis Deviation in Patients with Acute Heart Failure with Left Bundle Branch Block: Does It Really Matter? (Full text)

Left Axis Deviation in Patients with Acute Heart Failure with Left Bundle Branch Block: Does It Really Matter? 30334388 2018 11 14 1738-5520 48 11 2018 Nov Korean circulation journal Korean Circ J Left Axis Deviation in Patients with Acute Heart Failure with Left Bundle Branch Block: Does It Really Matter? 1012-1013 10.4070/kcj.2018.0222 Choi Eue Keun EK https://orcid.org/0000-0002-0411-6372 Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul

2018 Korean circulation journal PubMed

2. Prognostic Significance of Left Axis Deviation in Acute Heart Failure Patients with Left Bundle branch block: an Analysis from the Korean Acute Heart Failure (KorAHF) Registry (Full text)

Prognostic Significance of Left Axis Deviation in Acute Heart Failure Patients with Left Bundle branch block: an Analysis from the Korean Acute Heart Failure (KorAHF) Registry The prognostic impact of left axis deviation (LAD) on clinical outcomes in acute heart failure syndrome (AHFS) with left bundle branch block (LBBB) is unknown. The aim of this study was to determine the prognostic significance of axis deviation in acute heart failure patients with LBBB.Between March 2011 and February 2014 (...) =0.97). However, on the multiple linear regression analysis to evaluate the predictors of the left ventricular ejection fraction (LVEF), presence of LAD significantly predicted a worse LVEF (adjusted beta, -3.25; 95% confidence interval, -5.82, -0.67; p=0.01). Right ventricle (RV) dilatation was defined as at least 2 of 3 electrocardiographic criteria (late R in lead aVR, low voltages in limb leads, and R/S ratio <1 in lead V₅) and was more frequent in the LAD group than in the normal axis group (p

2018 Korean circulation journal PubMed

3. Left Axis Deviation in Children Without Previously Known Heart Disease. (PubMed)

Left Axis Deviation in Children Without Previously Known Heart Disease. Left axis deviation (LAD) discovered in children via electrocardiogram (ECG) is uncommon but can be associated with heart disease (HD). The optimal diagnostic approach in a seemingly healthy child with LAD is unclear. We sought to better stratify which patients with LAD but without previously known HD may warrant additional workup.A retrospective chart review was performed to identify patients ≥1 to <18 years of age (...) with LAD (QRS frontal plane axis 0 to -90) on an ECG between January 2002 and December 2014. Patients with known HD before their initial ECG were excluded.Overall, 296 patients were identified (n = 181 [61%] male; mean age: 10.8 ± 4.6 years; mean QRS axis: -24 ± 22°). An echocardiogram was performed in 158 (53%) patients, with 24 (15%) having HD. Compared with those with an echocardiogram but without HD (n = 134), patients with HD had a more negative mean QRS axis (-42 vs -27°; P = .002) and were more

2018 Pediatrics

4. Left Axis Deviation

Left Axis Deviation Left Axis Deviation Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Left Axis Deviation Left Axis Deviation Aka (...) : Left Axis Deviation , Left QRS Axis From Related Chapters II. Definition Deviation into lead aVL axis (-30 to-90 degrees) Negative net QRS voltage in lead avF (and lead II) Positive net QRS voltage in lead I On a clock face, 2:00 to 12:00 position III. Interpretation: Based on most isoelectric lead Images Approach See Lead with most symmetric voltage (as much positive QRS voltage as negative QRS voltage) Choose lead that is perpendicular to isoelectric lead and that leads axis is the same

2018 FP Notebook

5. Right Axis Deviation

(10:00) Most Isoelectric avF (I is perpendicular): -180 (9:00) Right Axis Deviation (+180 to +90, negative in lead I and positive in lead avF) Most Isoelectric avF (I is perpendicular): +180 (9:00) Most Isoelectric II (avL is perpendicular): +150 (8:00) Most Isoelectric avR (III is perpendicular): +120 (7:00) Most Isoelectric I (avF is perpendicular): +90 (6:00) IV. Causes Normal variation ( ) Left ventricular ectopic rhythm Wolf-Parkinson-White Syndrome ( ) Images: Related links to external sites (...) Right Axis Deviation Right Axis Deviation Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Right Axis Deviation Right Axis Deviation

2018 FP Notebook

6. Significance of left axis deviation on electrocardiogram in pediatric population: systematic review and meta-analysis

Significance of left axis deviation on electrocardiogram in pediatric population: systematic review and meta-analysis Print | PDF PROSPERO This information has been provided by the named contact for this review. CRD has accepted this information in good faith and registered the review in PROSPERO. CRD bears no responsibility or liability for the content of this registration record, any associated files or external websites. Email salutation (e.g. "Dr Smith" or "Joanne") for correspondence

2018 PROSPERO

7. Prognostic Implication of the QRS Axis and its Association with Myocardial Scarring in Patients with Left Bundle Branch Block (Full text)

Prognostic Implication of the QRS Axis and its Association with Myocardial Scarring in Patients with Left Bundle Branch Block Left bundle branch block (LBBB) with left axis deviation (LAD) has a worse prognosis than LBBB with a normal axis, and myocardial dysfunction has been suggested as a cause of left axis deviation. This study investigated the prognostic significance of the QRS axis in patients with LBBB and analyzed its relationship with the amount of myocardial scarring.A total of 829 (...) patients were diagnosed with LBBB at Seoul National University Hospital from October 2004 to June 2014. Of these, 314 who were asymptomatic and had no previous history of cardiac disease were included in the present study. Myocardial scarring was calculated using the Selvester QRS scoring system, and LAD was defined as a QRS axis between -180° and -30°.Of the total patients, 91 (29%) had LAD, and patients were followed for a median of 30 months. During follow-up, two patients were hospitalized for de

2017 Korean circulation journal PubMed

8. Study of intraventricular conduction times in patients with left bundle-branch block and left axis deviation and in patients with left bundle-branch block and normal QRS axis using His bundle electrograms. (Full text)

Study of intraventricular conduction times in patients with left bundle-branch block and left axis deviation and in patients with left bundle-branch block and normal QRS axis using His bundle electrograms. 4647098 1973 03 13 2018 11 13 0007-0769 34 12 1972 Dec British heart journal Br Heart J Study of intraventricular conduction times in patients with left bundle-branch block and left axis deviation and in patients with left bundle-branch block and normal QRS axis using His bundle electrograms

1972 British Heart Journal PubMed

9. Acute myocardial infarction and left bundle branch block with changing axis deviation. (PubMed)

Acute myocardial infarction and left bundle branch block with changing axis deviation. Changing axis deviation has been reported also during atrial fibrillation or atrial flutter. Changing axis deviation has been also reported during acute myocardial infarction associated with atrial fibrillation too or at the end of atrial fibrillation during acute myocardial infarction. Left bundle branch block is usually associated with normal or left axis deviation. Rarely the ECG shows a LBBB with changing (...) QRS morphology and changing axis deviation. There are several possible explanations for the intermittent shift in the QRS axis in the presence of complete left bundle branch block. The most plausible explanation is the coexistence of left posterior hemiblock and predivisional left bundle branch block. We present a case of a left bundle branch block with changing axis deviation in a 93-year-old Italian woman admitted to the Cardiology Unit with an acute myocardial infarction.Copyright © 2009

2012 International journal of cardiology

10. Left bundle branch block and changing axis deviation during acute myocardial infarction. (PubMed)

Left bundle branch block and changing axis deviation during acute myocardial infarction. Changing axis deviation has been reported also during atrial fibrillation or atrial flutter. Changing axis deviation has been also reported during acute myocardial infarction associated with atrial fibrillation too or at the end of atrial fibrillation during acute myocardial infarction. Left bundle branch block is usually associated with normal or left axis deviation. Rarely the ECG shows a left bundle (...) branch block with changing QRS morphology and changing axis deviation. We present a case of a left bundle branch block with changing axis deviation in an 86-year-old Italian man admitted to the Cardiology Unit with an acute myocardial infarction. Also this case focuses attention on left bundle branch block with changing axis deviation.Copyright © 2009 Elsevier Ireland Ltd. All rights reserved.

2012 International journal of cardiology

11. Left Axis Deviation

Left Axis Deviation Left Axis Deviation Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Left Axis Deviation Left Axis Deviation Aka (...) : Left Axis Deviation , Left QRS Axis From Related Chapters II. Definition Deviation into lead aVL axis (-30 to-90 degrees) Negative net QRS voltage in lead avF (and lead II) Positive net QRS voltage in lead I On a clock face, 2:00 to 12:00 position III. Interpretation: Based on most isoelectric lead Images Approach See Lead with most symmetric voltage (as much positive QRS voltage as negative QRS voltage) Choose lead that is perpendicular to isoelectric lead and that leads axis is the same

2015 FP Notebook

12. Prognostic significance of isolated left anterior hemiblock and left axis deviation in the course of acute myocardial infarction. (Full text)

Prognostic significance of isolated left anterior hemiblock and left axis deviation in the course of acute myocardial infarction. In 700 patients with acute myocardial infarction admitted to the intensive coronary care unit of our hospital, the incidence and significance of left anterior hemiblock and left axis deviation has been studied in the acute phase of disease. In 102 (14.6%) of the 700 patients, isolated left axis deviation (mean QRS axis-45 degrees) was found and 69 of them (9.9%) met (...) the criteria of left anterior hemiblock. Of the 69 patients with left anterior hemiblock, 61 had acute anterior myocardial infarction, 5 had inferior infarction, and 3 had subendocardial infarction. The anterior hemiblock was transient in 5 patients, but persisted in 64. All patients with and without isolated left anterior hemiblock and left axis deviation were compared statistically with reference to mortality rate and the incidence of arrythmias; no significant difference was noted. However, in patients

1977 British Heart Journal PubMed

13. LEFT VENTRICULAR PREPONDERANCE AND LEFT AXIS DEVIATION IN CYANOTIC CONGENITAL HEART DISEASE (Full text)

LEFT VENTRICULAR PREPONDERANCE AND LEFT AXIS DEVIATION IN CYANOTIC CONGENITAL HEART DISEASE 14072595 1996 12 01 2018 12 01 0007-0769 25 1963 Nov British heart journal Br Heart J LEFT VENTRICULAR PREPONDERANCE AND LEFT AXIS DEVIATION IN CYANOTIC CONGENITAL HEART DISEASE. 726-34 SHAHER R M RM eng Journal Article England Br Heart J 0370634 0007-0769 OM Adolescent Angiocardiography Child Cyanosis Electrocardiography Heart Defects, Congenital Humans Infant Infant, Newborn ADOLESCENCE

1963 British Heart Journal PubMed

14. Association of secundum atrial septal defect with abnormalities of atrioventricular conduction or left axis deviation. Genetic study of 10 families. (Full text)

Association of secundum atrial septal defect with abnormalities of atrioventricular conduction or left axis deviation. Genetic study of 10 families. A genetic analysis was made of 10 families in which the propositi had a secundum atrial septal defect associated with abnormal atrioventricular conduction (first, second, or third degree heart block) or unexplained left axis deviation or a combination of these conduction disturbances. Diagnostic information was available on 51 (81%) of the first (...) degree relatives. Three of the families appeared to be examples of a new syndrome which, with variable expression, was inherited as a non-sex-linked autosomal dominant. The main features were a secundum atrial septal defect; disease of the conducting tissue, which in some cases was progressive; unexplained left axis deviation; and unexpected death. These families did not seem to be examples of the Holt-Oram syndrome, for the upper limbs were clinically and radiologically normal in the 19 members

1975 British Heart Journal PubMed

15. Right bundle-branch block with left axis deviation. (Full text)

Right bundle-branch block with left axis deviation. 5911566 1966 11 26 2018 11 13 0007-0769 28 5 1966 Sep British heart journal Br Heart J Right bundle-branch block with left axis deviation. 703-8 Saltzman P P Linn H H Pick A A eng Journal Article England Br Heart J 0370634 0007-0769 AIM IM Aged Bundle-Branch Block diagnosis Electrocardiography Female Humans Male Middle Aged Vectorcardiography 1966 9 1 1966 9 1 0 1 1966 9 1 0 0 ppublish 5911566 PMC459105 Am Heart J. 1954 Mar;47(3):383-93

1966 British Heart Journal PubMed

16. Mahaim conduction producing left axis deviation and normal QRS. (Full text)

Mahaim conduction producing left axis deviation and normal QRS. An unusual patient is described in whom electrophysiological studies strongly suggest the occurrence of Mahaim conduction. The patient whose electrocardiogram previously showed a left anterior hemiblock pattern then developed advanced atrioventricular (AV) block (AH block). Beats conducted through the atrioventricular node always had a short HV interval (20 ms) and QRS complexes of left anterior hemiblock pattern. Junctional escape (...) beats always had a normal HV interval (50 ms) with normal intraventricular conduction. His bundle pacing showed the StV interval and QRS contour of escape beats. These findings suggest the existence of an accessory pathway (Mahaim fibres) passing from the area of block, presumably the uppermost portion of the His bundle, to the posteroinferior division of the left bundle-branch. The surface electrocardiogram did not show the characteristic delta wave of the Wolff-Parkinson-White syndrome. Our

1978 British Heart Journal PubMed

17. THE SIGNIFICANCE OF LEFT AXIS DEVIATION IN HEART DISEASE OF THE AFRICAN (Full text)

THE SIGNIFICANCE OF LEFT AXIS DEVIATION IN HEART DISEASE OF THE AFRICAN 13747248 1998 11 01 2018 11 30 0007-0769 23 1961 Jul British heart journal Br Heart J The significance of left axis deviation in heart disease of the African. 405-14 SCHAMROTH L L BLUMSOHN D D eng Journal Article England Br Heart J 0370634 0007-0769 OM Cardiovascular Diseases Diagnostic Techniques, Cardiovascular Electrocardiography Heart Diseases diagnosis Humans ELECTROCARDIOGRAPHY HEART DISEASES/diagnosis 1961 7 1 1961 7

1961 British Heart Journal PubMed

18. Right bundle-branch block and left axis deviation in acute myocardial infarction. (Full text)

Right bundle-branch block and left axis deviation in acute myocardial infarction. Of 114 patients with acute myocardial infarction admitted consecutively to a coronary care unit, 10 had recent antero-septal myocardial infarction associated with right bundle-branch block and obvious left axis deviation, and I had recent antero-septal myocardial infarction with right bundle-branch block and right axis deviation. Attention is drawn to the high mortality (7 out of 11 patients), due mainly

1970 British Heart Journal PubMed

19. Vectorcardiographic study of QRS loop in patients with left superior axis deviation and right bundle-branch block (Full text)

Vectorcardiographic study of QRS loop in patients with left superior axis deviation and right bundle-branch block Thirty-four elderly patients with right bundle-branch block and left axis deviation were studied vectorcardiographically utilizing the McFee-Parungao system. Atherosclerosis, arterial hypertension, angina pectoris, cardiac enlargement, and heart failure were common clinical features in this series. Moreover, intermittent advanced degree of atrioventricular block was present in 10 (...) out of the 34 patients. The vectorcardiograms might be readily classified into two basic patterns, types A and B. In type A (19 cases), the frontal plane loop was open-faced. The initial vectors were directed anteriorly, inferiorly, and to the right. The mid-temporal vectors were located in the left postero-superior octant, and the late portion of the loop was inscribed anteriorly to the right with conspicuous conduction delay. Those vectorcardiographic features associate the characteristic

1970 British Heart Journal PubMed

20. Left axis deviation. An electrocardiographic study with post-mortem correlation. (Full text)

Left axis deviation. An electrocardiographic study with post-mortem correlation. 5791124 1969 08 20 2018 11 13 0007-0769 31 4 1969 Jul British heart journal Br Heart J Left axis deviation. An electrocardiographic study with post-mortem correlation. 451-6 Bahl O P OP Walsh T J TJ Massie E E eng Journal Article England Br Heart J 0370634 0007-0769 AIM IM Adult Aged Cardiomyopathies diagnosis Coronary Disease diagnosis Electrocardiography Female Heart Diseases diagnosis Humans Hyperkalemia

1969 British Heart Journal PubMed

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