• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Pharmacological Cardioversion of Atrial Fibrillation: Which Drugs
Pharmacological Cardioversion of Atrial Fibrillation: Which Drugs

... such as amiodarone, a class III antiarrhythmic drug, are contraindicated because of their depressive actions on nodal conduction, which may speed up the ventricular response during AF and increase the risk of degeneration to ventricular fibrillation [17]. Instead, in recent years, a single oral load ...
Arrhythmias During the 1st Week of Acute Myocardial Infarction: An
Arrhythmias During the 1st Week of Acute Myocardial Infarction: An

... Patients in hyper-acute or acute phase of MI above 18 years of age are included. Patients with age <18 years. MI of more than 1 week old. Patients already on arrhythmogenic drugs like digoxin. Patients with K/C/O arrhythmias. Patients with valvular heart disease. Patients requiring intervention like ...
ANTIARRHYTHMIC DRUGS
ANTIARRHYTHMIC DRUGS

... produce both negative • They are used in treatment inotropic & chronotropic of increased sympathetic effects activity-induced arrhythmias such as stress• They diminish phase 4 and exercise-induced spontaneous arrhythmias depolarization suppressing automaticity and • Treatment of atrial flutter prolo ...
Congenital Cardiovascular Defects
Congenital Cardiovascular Defects

... In the United States, 1 in 150 adults are expected to have some form of congenital heart disease. The most common types of defects in children are (at a minimum) ventricular septal defects, 620,000 people; ASD, 235,000 people; valvular pulmonary stenosis, 185,000 people; and patent ductus arteriosus ...
utmj submission template - University of Toronto Medical Journal
utmj submission template - University of Toronto Medical Journal

... There are no accepted guidelines as to how to treat patients with NC. In patients who developed symptoms of heart failure and had advanced heart failure symptoms, medical treatment with ACEi, diuretics, beta-blockers appear to have favorable results9. With previous studies showing a stabilization of ...
cardiac stress agent notes
cardiac stress agent notes

... Artifacts related to non-coronary disease. * Left bundle-branch block (LBBB). This conduction abnormality produces apparent septal hypoperfusion that can be either reversible or fixed, lowering the specificity of the study for detection of ischemic heart disease. In gated studies, however, the septa ...
ATRIOVENTRICULAR BLOCKS AND CARDIAC PACEMAKERS
ATRIOVENTRICULAR BLOCKS AND CARDIAC PACEMAKERS

File - Jessica Owen
File - Jessica Owen

... • Fluid = Preload ...
The heart is responsible for generating the pressure that propels
The heart is responsible for generating the pressure that propels

... thin interatrial septum divides the 2 atria, while the thick interventricular septum divides the 2 ventricles. The heart consists of 2 pumps connected in series. Each pump sends blood to a different circuit. The pulmonary circuit runs btwn the heart and the lungs. The systemic circuit runs btwn the ...
Prevention and Management of Arrhythmias in Acute Myocardial
Prevention and Management of Arrhythmias in Acute Myocardial

... size of infarction and to increased use of beta-blocker, the incidence of sustained VT/VF has declined. Still it remains a major cause of mortality in ACS patients. Direct current CV/ defibrillation is the treatment of choice in VT/VF. If ischemia is suspected to be responsible for arrhythmia, immed ...
A criss-cross heart
A criss-cross heart

... three presented with cyanosis, three with murmur, and one with respiratory distress and heart failure. The visceroatrial situs was solitus in all patients including levocardia in five and dextrocardia in two. The atrioventricular connection was concordant in four patients and discordant in one patie ...
Imaging in heart failure: role of echocardiography
Imaging in heart failure: role of echocardiography

... CRT in sinus rhythm and a persistently reduced LVEF ...
Glasgow 12-lead ECG Analysis Program
Glasgow 12-lead ECG Analysis Program

... year old male. Entry of patient age and gender are strongly encouraged for maximizing the accuracy of diagnostic statements, especially for acute ST elevation myocardial infarction. The Glasgow program can, for some statements, also use race and clinical classification (e.g., congenital heart diseas ...
UNIT 13 STUDY GUIDE KEY CARDIOVASCULAR SYSTEM: THE
UNIT 13 STUDY GUIDE KEY CARDIOVASCULAR SYSTEM: THE

... name all these vessels). Include all the heart chambers, the heart valves, the main vessels leading to and from the heart and the lungs. Blood travels from the body through the Vena cava, which empties into Right Atrium. Blood then goes through the tricuspid valve into the right ventricle. It then ...
Dr. Weyrich G06: Heart and Middle Mediastinum Reading: 1. Gray`s
Dr. Weyrich G06: Heart and Middle Mediastinum Reading: 1. Gray`s

... Right coronary artery – arises from right aortic sinus SA nodal artery – supplies SA node -NOTE: the SA nodal artery can also arise from the LCA(~40%) Right marginal branch – supplies the right border of the heart AV nodal artery – supplies AV node Posterior interventricular branch – supplies both v ...
Print - Circulation
Print - Circulation

... conscious patient and have no discernible ill effects, early or delayed. An esophageal electrode was successfully used for ventricular defibrillation in dogs.6 Our aim in using it in man was to reduce the electrical energy sufficiently to permit application of countershock without anesthesia. Other ...
Beneficial effects of trimetazidine (Vastarel MR) in patients with
Beneficial effects of trimetazidine (Vastarel MR) in patients with

... phosphocreatine (PCr) and adenosintriphosphate (ATP) [2]. Previous clinical studies using phosphorus31 magnetic resonance spectroscopy to measure PCr/ATP ratios in human myocardium have shown that this ratio is reduced in failing human myocardium [20]. The PCr/ATP ratio is a measure of myocardial en ...
pdf Living with an ICD
pdf Living with an ICD

... ICD system is prescribed by your physician. This treatment is not for everyone. Please talk to your doctor to see if it is right for you. Your physician should discuss all potential benefits and risks with you. Although many patients benefit from the use of this treatment, results may vary. For furt ...
Pediatric pacemakers and ICDs: how to optimize perioperative care
Pediatric pacemakers and ICDs: how to optimize perioperative care

... The location and function of pacemakers are described using an internationally recognized code that was developed by The North American Society of Pacing and Electrophysiology (NAPSE) and the British Pacing and Electrophysiology group (Table 1) (8). The five-position code shown in Table 1 is often sh ...
life with an implantable defibrillator
life with an implantable defibrillator

... Treatment with an ICD system is prescribed by your physician. This treatment is not for everyone. Please talk to your doctor to see if it is right for you. Your physician should discuss all potential benefits and risks with you. Although many patients benefit from the use of this treatment, results ...
dereks-presentation-almost-done-really-this-time-i
dereks-presentation-almost-done-really-this-time-i

... Aorta: The central conduit from the heart to the body, the aorta carries oxygenated blood from the left ventricle to various parts of the body as the left ventricle contracts. Left Atrium: The upper left chamber of the heart. The left atrium receives oxygenated blood from the lungs through the pulmo ...
Cardiac Output (C.O.) Regulation of Cardiac Output
Cardiac Output (C.O.) Regulation of Cardiac Output

... post ganglionic fiber to he atria (Not the ventricle) • Function: 1) heart rate → may stop atrial beat but not the ventricle that escape from vagal inhibition. Parasympathetic stimulation → acetyl choline → K permeability in S-A node → prepotential slope → heart rate. 2) cardiac contractility to les ...
Cardiovascular system
Cardiovascular system

... the septum versus left ventricle free wall (asymmetrical septal hypertrophy) ...
Practical CV_cardiac cycle
Practical CV_cardiac cycle

... blood from the left ventricle. Before this wave there is a small wave (a wave) produced by the atrial systole. The pressure pulse increases sharply as the blood enters the aorta faster than it flows away to the periphery. This ascending portion of the carotid pressure curve is called the anacrotic l ...
Depolarization and Repolarization
Depolarization and Repolarization

... – 1st degree AV block – 2nd degree AV block Type I – 2nd degree AV block Type II – 3rd degree AV block ...
< 1 ... 402 403 404 405 406 407 408 409 410 ... 762 >

Electrocardiography



Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report