• 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
Improvement of Cardiac Performance by Intravenous Infusion of L
Improvement of Cardiac Performance by Intravenous Infusion of L

... rhythm, and none had active anginal syndrome, recent myocardial infarction, coronary artery bypass surgery or any systemic chronic disease. Doppler echocardiography, performed before the study to ensure adequate visualization, showed mild functional mitral regurgitation in 3 of the 12 patients. All ...
Atrial fibrillation and outcomes in heart failure with preserved versus
Atrial fibrillation and outcomes in heart failure with preserved versus

... frequently complicates HF. We examined how AF has impacts on adverse outcomes in HF-PEF versus HF-REF within a large, contemporary cohort. Methods and Results-—We identified all adults diagnosed with HF-PEF or HF-REF based on hospital discharge and ambulatory visit diagnoses and relevant imaging resu ...
Detection and management of preclinical heart failure
Detection and management of preclinical heart failure

... 3. Proof of Principle – TasELF study 4. Lessons about community-based RCTs ...
W J Paulus and D L Brutsaert 1980;46:303-304 doi: 10.1161/01.RES.46.2.303
W J Paulus and D L Brutsaert 1980;46:303-304 doi: 10.1161/01.RES.46.2.303

... figure are shown force and length obtained from a number of contractions of a thin trabecular muscle, isolated from an adult cat, recorded as a function of time (left) and displayed in an x-y diagram (right). The experiment was designed to resemble closely the normal cardiac contraction with respect ...
Pregnancy and heart disease - International Journal of
Pregnancy and heart disease - International Journal of

... abnormalities and symptoms of heart failure can include the use of diuretics and digoxin.2,13 The prevalence of mitral valve prolapse in the general population has been found to be 2.4% and is reported in approximately 1.2% of pregnant women. Because of high incidence of systolic functional murmurs ...
Blood Pressure and Heart Rate Variability
Blood Pressure and Heart Rate Variability

... parasympathetic control of heart rate during acute exacerbations of COPD. What is the clinical relevance of the observed reductions in systemic blood pressure and heart rate in association with increased parasympathetic modulation of heart rate in patients with COPD? Abnormalities in autonomic nervo ...
rubidium-82 rest-stress myocardial perfusion protocol - Image-HF
rubidium-82 rest-stress myocardial perfusion protocol - Image-HF

... • Development of hypotension by < 20 mmHg compared to the previous stage. Infusion can be continued despite this drop in blood pressure at the discretion of the supervising physician. • Development of intolerable symptoms. 5) Contraindications: • Recent (< 1 week) myocardial infarction. • Unstable a ...
Histological architecture of cardiac myofibers composing the left
Histological architecture of cardiac myofibers composing the left

... orientation is more oblique on the anterior wall than the posterior wall. Finally, from the apex to the base of the heart, the epicardial fibers are arranged clockwise, and the endocardial fibers are counter-clockwise [2]. There is no anatomic evidence supporting the concept of the "ventricular myoc ...
Innovative devices for advanced heart failure
Innovative devices for advanced heart failure

... The first randomized study of SCS in heart failure was recently reported by Torre-Amione et al. [32]. In this prospective, randomized, double-blind, crossover pilot study, nine patients with NYHA class III heart failure with an LVEF 30% or less and who had been hospitalized or received inotropic sup ...
Defibrillation
Defibrillation

A novel treatment strategy of new onset atrial fibrillation after cardiac
A novel treatment strategy of new onset atrial fibrillation after cardiac

... Postoperative atrial fibrillation (AF) is the most common complication after cardiac surgery, which occurs in up to 74% of patients who underwent on-pump and off-pump procedures [1,2]. Furthermore, it may contribute to longer hospital stays which can be associated with deterioration in heart failure ...
Defibrillation
Defibrillation

... The patient's cardiac status, breathing, and vital signs are monitored until he or she is stable. An electrocardiogram and chest x ray are taken. The patient's skin is cleansed to remove gel or paste, and, if necessary, ointment is applied to burns. An intravenous line provides additional medication ...
to know more about my own HEART story - Heart
to know more about my own HEART story - Heart

... This is examined and tested by various methods 1] ECG electrocardiography is of orbital things basic test for the heart trouble. ECG means the graph of the wave form of oscillations in the heart; and it is taken whenever the heart dangerously Pulsations increase or there are disturbances or obstruct ...
Process Owner: PO Both
Process Owner: PO Both

... Date Approved: ...
2.Heart as Pump - Notes For ANZCA Primary Exam
2.Heart as Pump - Notes For ANZCA Primary Exam

... • Left ventricular contraction then R vent • R vent ejection just before L vent ! as pressure in pulmon circuit < aortic pressures • End of systole (S2 heart sound) o During inspiration – pulmon valve closure delayed o During expiration – aortic & pulmon valves together ...
Download Hopkins Pulse Spring 2015 as a PDF
Download Hopkins Pulse Spring 2015 as a PDF

... placed under the surface of the chest,” says Cheng. “The main advantage is that patients will not face the risk of difficult lead extractions in the future, but there are some drawbacks.” The battery needs to be replaced after about four years. The device is also about twice as large as a traditiona ...
PDF - Circulation: Arrhythmia and Electrophysiology
PDF - Circulation: Arrhythmia and Electrophysiology

... Figure 7.  Schematic for activation in clockwise bundle-branch re-entrant ventricular tachycardia. The anatomy of bundle-branches is drawn, as previously described by Massing and James.7 The left bundle-branch divides in the basal septum at a variable length below aortic valve to anterior and poster ...
Prognostic value of Holter monitoring in congestive heart failure
Prognostic value of Holter monitoring in congestive heart failure

... In heart failure populations of the Vasodilators in Heart Failure Trial (V-HeFT) [11] and the Prospective Randomized Study of Ibopamine on Mortality and Efficacy (PRIME) [12] studies, AF was not identified as a significant predictor of mortality, whereas analysis of data from the Studies of Left Ven ...
Chest X-ray Interpretation
Chest X-ray Interpretation

... If no signposts are present, then the diagnosis is unlikely to be a valvular lesion. The absence of signposts should direct attention to a disease directly afflicting the myocardium or pericardium, such as acute MI, hypertrophic cardiomyopathy, restrictive cardiomyopathy, and constrictive pericardia ...
heart and respiratory rates and their significance for convective
heart and respiratory rates and their significance for convective

... area. In order to obtain a better reflection of the laser beam, a small area of the animal’s coat was shaved and covered with white correction fluid. An example of such a recording is shown in Fig. 2. Since the respiratory rate can be identified from the ECG recordings as long as artefacts caused by ...
Junctional Ectopic Tachycardia after Congenital Heart Surgery
Junctional Ectopic Tachycardia after Congenital Heart Surgery

... the temporary epicardial pacing wires, which are placed during surgery, can be used to create an atrial electrocardiogram (ACG). An ACG can unmask the P-waves that disappear in the QRS-complex or T-wave (Fig. 4) (1, 20) and, in addition, demonstrate VA-dissociation (24). An atrial ECG can be taken b ...
12. What type of tissue carries small electrical currents to the muscles?
12. What type of tissue carries small electrical currents to the muscles?

... Parts of the Heart – Structure and Function The heart is a large hollow muscle. Tubes called veins bring blood to the heart. Other tubes called arteries carry blood away from the heart. Regulators called valves control the flow of blood through the heart itself. The heart consists of four chambers. ...
Adult basic life support
Adult basic life support

... indomethacin may induce closure if given early • Operative closure – this can be performed as an open procedure in which the PDA is ligated or divided • Or using ADO (Amplatzer ductal occluder) by cardiac catheter ...
Misdiagnosis of Dextrocardia and Situs Inversus in a two Year Old
Misdiagnosis of Dextrocardia and Situs Inversus in a two Year Old

... This condition is called Dextrocardia. When the organs along with Dextrocardia are oriented on the opposite side, this situation is called Situs inversus6. The ratio of congenital cardiac anomalies of Dextrocardia with Situs inversus is 1:10,000, which is low as compared to isolated congenital dextr ...
MINISTRY OF HEALTH PROTECTION OF THE REPUBLIC OF
MINISTRY OF HEALTH PROTECTION OF THE REPUBLIC OF

... increase the intensity of the pain on swallowing, shortness of breath, severe weakness. According to the patient, the disease suddenly started an hour ago, when I first began to complain of severe pain in the chest. History of working in construction for 15 years, suffers from high A / D, has never ...
< 1 ... 252 253 254 255 256 257 258 259 260 ... 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