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Electrocardiography Electrocardiography is a commonly used, non-invasive procedure for recording electrical changes in the heart. Electrocardiography is a starting point for detecting many cardiac problems. It is used routinely in physical examinations and for monitoring the patient's condition during and after surgery, as well as during intensive care. www.healthatoz.com /healthatoz/Atoz/ency/electrocardiography.jsp   (1047 words)

electrocardiography on Encyclopedia.com   (Site not responding. Last check: 2007-10-09) Is ambulatory electrocardiography useful in the evaluation of patients with recent stroke? Electrocardiography to define clinical status in primary pulmonary hypertension and pulmonary arterial hypertension secondary to collagen vascular disease *. Using ambulatory electrocardiography during recovery from cardiac surgery. www.encyclopedia.com /html/e1/electroca.asp   (524 words)

ACC/AHA Clinical Competence Statement on Electrocardiography - Ambulatory Electrocardiogram Monitoring Ambulatory electrocardiography is used in clinical practice to detect, document, and characterize occurrences of abnormal cardiac electrical behavior of the heart during ordinary daily activities. Current continuous ambulatory electrocardiography equipment is capable of providing analysis of multiple parameters of cardiac electrical activity including, arrhythmia analysis, analysis of ST-segment shifts, and assessment of heart rate variability. Ambulatory electrocardiography is a subdivision of clinical electrocardiography and for this reason the criteria for competence are frequently the same as those for classic electrocardiography. www.acc.org /clinical/competence/ECG/IV_ambulatory.htm   (1498 words)

MSN Encarta - Willem Einthoven Einthoven's most important invention, the string galvanometer, made possible the precise measurements of the electrical activity produced by the beating human heart. Modern electrocardiograph machines, which allow physicians to monitor heart function and to detect damage from heart attacks and other causes, are based on Einthoven's original invention. For his essential contributions to the development of electrocardiography, Einthoven was awarded the 1924 Nobel Prize in physiology or medicine. encarta.msn.com /encyclopedia_761582705/Einthoven_Willem.html   (459 words)

Critical Care | Full text | The limited utility of electrocardiography variables used to predict arrhythmia in ...   (Site not responding. Last check: 2007-10-09) The aim of the present study was to examine the relationship between serious arrhythmias in patients with psychotropic drug overdose and electrocardiography (ECG) findings that have been suggested previously to predict this complication. Thirty-nine patients with serious arrhythmias (ventricular tachycardia, supraventricular tachycardia or cardiac arrest) after tricyclic antidepressant overdose or thioridazine overdose were compared with 117 controls with clinically significant overdose matched to each case for the drug ingested. The electrocardiography (ECG) findings examined have included the QRS duration, the QT interval duration, and the axis of the terminal 40 ms of the QRS complex represented by the height of the R wave and the R/S ratio in aVR [6-20]. ccforum.com /content/7/5/R101   (4097 words)

CJNS-Use of Ambulatory Electrocardiography for the Detection of Paroxysmal Atrial Fibrillation in Patients with Stroke There is conflicting evidence in the literature regarding whether routine ambulatory electrocardiography should be performed in all or selected stroke patients. This paper reviews the available evidence on (1) the yield of ambulatory electrocardiography in detecting paroxysmal atrial fibrillation in patients with stroke or transient ischemic attack and (2) the effectiveness of anticoagulation in preventing recurrent stroke in patients with paroxysmal atrial fibrillation. Interpretation: There is insufficient evidence to recommend for or against the use of ambulatory electrocardiography for the detection of paroxysmal atrial fibrillation in either selected or unselected patients with stroke (C Recommendation). www.cjns.org /27febtoc/ambulate.html   (674 words)

Electrocardiography Using a process called electrocardiography, those electrical discharges can be recorded and used to measure the heart's condition. Since most electrocardiograms show a healthy heart for patients at rest, doctors take the readout while the patient is under the stress of strenuous activity. Stress electrocardiography reveals a different picture of the heart's health. sln2.fi.edu /biosci/monitor/ekg.html   (101 words)

CHEST: Electrocardiography to define clinical status in primary pulmonary hypertension and pulmonary arterial ...   (Site not responding. Last check: 2007-10-09) Electrocardiography to define clinical status in primary pulmonary hypertension and pulmonary arterial hypertension secondary to collagen vascular disease - clinical investigations - Statistical Data Included Patients: Adult outpatients with PPH or PAH secondary to collagen vascular disease who underwent electrocardiography within 30 days of undergoing right-heart catheterization, echocardiography, and 6-min walk testing. Measurements and results: The following measurements were recorded from each ECG: P-wave amplitude in lead II; mean frontal QRS axis; QRS duration; R-wave and S-wave deflections in leads I and V6; and the T-wave configurations in the precordial leads. findarticles.com /cf_dls/m0984/2_122/90868699/p1/article.jhtml   (1401 words)

A3 The inverse problem of electrocardiography In contrast to other methods, formulated for pericardial potentials, the strength of describing the inverse problem of electrocardiography in terms of the ventricular depolarization times is that this approach implicitly poses time constraints on the permissable solution space. The inverse problem of electrocardiography is known to be ill-posed. A new algorithm to solve the inverse problem of electrocardiography, based on Greensite's `critical point theorem' that had been formulated earlier, was developed. www.mbfys.kun.nl /mbfys/bioel/projects/node3.html   (717 words)

NGC - NGC Summary Use of ambulatory electrocardiography for the detection of paroxysmal atrial fibrillation in patients with stroke. Routine ambulatory electrocardiography in all stroke patients or ambulatory electrocardiography in selected patients. Ambulatory electrocardiography can detect atrial fibrillation not found on the initial electrocardiogram in between 1% and 5.4% of people with stroke. www.guideline.gov /summary/summary.aspx?ss=15&doc_id=2703&nbr=1929   (1674 words)

Technician run open access exercise electrocardiography -- Agrawal et al. 82 (3): 378 -- Heart Exercise electrocardiography is a well established investigation in the diagnosis and prognostic assessment of patients with Open access exercise electrocardiography: a service to improve management of ischaemic heart disease by general practitioners. Direct access electrocardiography: a new service that improves the management of suspected ischaemic heart disease in the community. www.heartjnl.com /cgi/content/full/82/3/378   (3218 words)

ABC of clinical electrocardiography: Paediatric electrocardiography -- Goodacre and McLeod 324 (7350): 1382 -- BMJ ABC of clinical electrocardiography: Paediatric electrocardiography -- Goodacre and McLeod 324 (7350): 1382 -- BMJ Be aware of age related differences in the indications for performing electrocardiography, the normal ranges for electrocardiographic variables, and the typical abnormalities in infants and children The ABC of clinical electrocardiography is edited by Francis Morris, consultant in emergency medicine at the Northern General bmj.bmjjournals.com /cgi/content/full/324/7350/1382   (1622 words)

Signal Averaged Electrocardiography (SAECG)   (Site not responding. Last check: 2007-10-09) Signal-averaged electrocardiography (SAECG) is one of the tests used to predict which individuals are at highest risk of experiencing an arrhythmic event (either a sustained arrhythmia or sudden cardiac death). SAECG is a modification of conventional ECG recordings in which signals are first amplified, then filtered, and finally averaged with the assistance of computer software. The scientific evidence must permit conclusions concerning the effect of the technology on health outcomes. www.bcbst.com /MPManual/Signal_Averaged_Electrocardiography_(ECG).htm   (319 words)

ECG timeline - History of the electrocardiogram Oesophageal electrocardiography later developed in the 1970s to help differentiate atrial arrhythmias. It describes ventricular hypertrophy, atrial and ventricular ectopics, atrial fibrillation and ventricular fibrillation. A history of the origin, evolution, and impact of electrocardiography. www.ecglibrary.com /ecghist.html   (6174 words)

Prediction of the effectiveness of long term beta  blocker treatment for dilated cardiomyopathy by signal averaged ... Prediction of the effectiveness of long term beta  blocker treatment for dilated cardiomyopathy by signal averaged electrocardiography -- Yamada et al. blocker treatment for dilated cardiomyopathy by signal averaged electrocardiography A signal averaged ECG might be useful in predicting the effectiveness of heartjnl.highwire.org /cgi/content/abstract/79/3/256   (290 words)

Ch 1 - The Creation of Electrocardiography Wilson and his associates dominated the field of electrocardiography for many decades. While working at Emory University in Atlanta, he built on the work of Einthoven, Lewis, and Wilson, and developed a way to apply vector concepts to the interpretation of a 12-lead electrocardiogram. While working at Emory University, Grant developed the concept of vector electrocardiography, which enabled the observer to characterize the electrical forces responsible for the electrocardiogram. www.aha.gr /Ventricular_electrocardiography/pnt-VentElec.ch01.hurs.html   (2264 words)

Electrocardiography Medical Services > Clinical Services > Heart Services > Services and Specialties > Cardiology > Electrocardiography Electrocardiography is a method of testing the heart’s electrical activity. An electrocardiogram is a graphic record of the electrical impulses that move through the heart as it beats. www.whcenter.org /body.cfm?id=367   (466 words)

ACC/AHA Guidelines for Ambulatory Electrocardiography: Executive Summary and Recommendations : A Report of the American ... ACC/AHA Guidelines for Ambulatory Electrocardiography: Executive Summary and Recommendations : A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee to Revise the Guidelines for Ambulatory Electrocardiography) Developed in Collaboration With the North American Society for Pacing and Electrophysiology -- Crawford et al. Electrocardiography)" was approved by the American College of ACC/AHA clinical competence statement on electrocardiography and ambulatory electrocardiography: A report of the ACC/AHA/ACP-ASIM Task Force on Clinical Competence (ACC/AHA Committee to Develop a Clinical Competence Statement on Electrocardiography and Ambulatory Electrocardiography) Endorsed by the International Society for Holter and Noninvasive Electrocardiology circ.ahajournals.org /cgi/content/full/100/8/886   (4508 words)

Technician run open access exercise electrocardiography -- Agrawal et al. 82 (3): 378 -- Heart Technician run open access exercise electrocardiography -- Agrawal et al. To evaluate the safety, efficacy, and feasibility of the technician run open access exercise electrocardiography service at 269 patients randomly selected from 552 who underwent open access exercise electrocardiography over a 2.5 year www.heartjnl.com /cgi/content/abstract/82/3/378   (320 words)

Houston veterinarians, Memorial Town & Country Animal Clinic and Hospital - an AAHA Houston area veterinary ...   (Site not responding. Last check: 2007-10-09) As a licensed veterinarian, she has over 10 years of experience. The clinic is equipped to offer many modern diagnostic services including ultrasound, radiology, electrocardiography (EKG), and clinical pathology. Once a diagnosis is made, we are staffed to meet most surgical and medical needs. www.mtcac.com   (167 words)

T0000030 ECG Wave-Maven: An Internet-based Electrocardiography Self-Assessment Program for Students and Clinicians The most common reason cited for visiting the site was for educational purposes. ECG Wave-Maven is a recently introduced internet tutorial designed to help develop and maintain electrocardiography reading proficiency. ECG wave- maven: An internet-based electrocardiography self-assessment program for students and clinicians Med Educ Online [serial online] 2003;8:2. www.med-ed-online.org /t0000030.htm   (1623 words)

IB 132L Mammalian Physiology Lab Performance of laboratory procedures in the measurement and interpretation of physiological fitness (cardiorespiratory endurance, body composition, musculoskeletal fitness). Clinical application and practice of exercise testing, electrocardiography, and exercise prescription in UC Fitness Evaluation Program. George A. Brooks (IB) Exercise physiology and metabolism. ib.berkeley.edu /courses/ib132l/labs/ecg.html   (437 words)

Electrocardiography to Define Clinical Status in Primary Pulmonary Hypertension and Pulmonary Arterial Hypertension ... Electrocardiography to Define Clinical Status in Primary Pulmonary Hypertension and Pulmonary Arterial Hypertension Secondary to Collagen Vascular Disease* -- Ahearn et al. Electrocardiography to Define Clinical Status in Primary Pulmonary Hypertension and Pulmonary Arterial Hypertension Secondary to Collagen Vascular Disease Key Words: diagnosis • echocardiography • electrocardiography • exercise testing • hemodynamics • pulmonary arterial hypertension • pulmonary vascular disease www.chestjournal.org /cgi/content/abstract/122/2/524   (500 words)

Amazon.com: Marriott's Practical Electrocardiography: Books   (Site not responding. Last check: 2007-10-09) Chou's Electrocardiography in Clinical Practice by Borys Surawicz Wagner has stepped up and authored the ninth edition of Practical electrocardiography. Given that electrocardiography is a difficult subject to begin to understand, Wagner has continued the excellent work of Dr. Marriott by updating and expanding on the classic text. www.amazon.com /exec/obidos/tg/detail/-/0683307460?v=glance   (786 words)

IngentaConnect Mechanisms of Abnormal Q Waves in Hypertrophic Cardiomyopathy Ass...   (Site not responding. Last check: 2007-10-09) Mechanisms of Abnormal Q Waves in Hypertrophic Cardiomyopathy Assessed by Intracoronary Electrocardiography Introduction: To clarify the mechanisms of abnormal Q waves in hypertrophic cardiomyopathy (HCM), local epicardial electrical activities were assessed by intracoronary electrocardiography (ECG). Methods and Results: Unipolar intracoronary ECG was recorded by introducing a guide wire for angioplasty into the left anterior descending artery (LAD) in 20 patients with HCM and 10 control subjects. www.ingentaconnect.com /content/bsc/jce/2004/00000015/00000012/art00013   (363 words)

A Comparison of 2-Lead, 6-Lead, and 12-Lead ECGs in Patients With Changing Edematous States: Implications for the ... A Comparison of 2-Lead, 6-Lead, and 12-Lead ECGs in Patients With Changing Edematous States: Implications for the Employment of Quantitative Electrocardiography in Research and Clinical Applications -- Madias 124 (6): 2057 -- Chest Implications for the Employment of Quantitative Electrocardiography in Research and Clinical Applications John E. Madias, MD From the Division of Cardiology, Elmhurst Hospital Center, Elmhurst, NY. www.chestjournal.org /cgi/content/abstract/124/6/2057   (396 words)

Amazon.com: Understanding Electrocardiography: Books: Mary Boudreau Conover   (Site not responding. Last check: 2007-10-09) UNDERSTANDING ELECTROCARDIOGRAPHY is both the title and the goal for this book. It is designed for beginners who must start with the fundamentals as well as experienced clinicians who seek a deep comprehension of the 12-lead ECG and complex arrhythmias. Customers interested in Understanding Electrocardiography may also be interested in www.amazon.com /exec/obidos/tg/detail/-/0815119275?v=glance   (483 words)

American Family Physician: Effect of Out-Of-Hospital Electrocardiography.@ HighBeam Research   (Site not responding. Last check: 2007-10-09) Search for more information on HighBeam Research for. Out-of-hospital electrocardiography (ECG) is the basis for identifying patients with suspected acute myocardial infarction (AMI) who should receive early thrombolytic therapy before arriving at the hospital. The diagnostic accuracy of out-of-hospital ECG in identifying AMI and acute coronary insufficiency has been reported in several studies. highbeam.com /library/doc0.asp?DOCID=1G1:82035754&...   (193 words)

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