• 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
Understanding your child`s heart Pulmonary stenosis
Understanding your child`s heart Pulmonary stenosis

... Your child will continue to have check-ups at a specialist centre for congenital heart disease throughout their life. Up to the age of about 16, he or she will go to a centre which may be called a ‘specialist centre for children with congenital heart disease’, or a ‘specialist paediatric centre’. (P ...
Stress Echocardiography - Gvsu - Grand Valley State University
Stress Echocardiography - Gvsu - Grand Valley State University

... progressive chronotropic response at increasing doses Peripheral effects may result in either predominant:  Vasoconstriction or vasodilation Changes in vascular resistance (i.e. blood pressure) are ...
2016 IJC-D-16-00650_R1_FINAL_SUBMIT_figs
2016 IJC-D-16-00650_R1_FINAL_SUBMIT_figs

... AF naïve patients. Method: Bipolar electrograms were recorded from the lateral right atrial (RA) wall in 34 patients undergoing coronary surgery using a high-density array in sinus rhythm (NSR). RA burst pacing at 200/500/1000ms cycle lengths (CL) was performed, recording episodes of AF>30s. Co-loca ...
left atrium volume as a surrogate marker of left ventricular diastolic
left atrium volume as a surrogate marker of left ventricular diastolic

... This was the first study conducted locally, which looked into the correlation between left atrial volume with worsening diastolic dysfunction in adults with relatively preserved systolic function. We found that DD directly influence left atrial remodeling. These results reinforce the concept of the ...
Coronary Blood Flow
Coronary Blood Flow

growth and development
growth and development

... Prone to arrhythmias. ...
Computationally generated cardiac biomarkers
Computationally generated cardiac biomarkers

... related to cardiac health, can lead to a more accurate evaluation of the current state of a patient and the likely impact of various therapies. We refer to the information generated by such algorithms as computational biomarkers, which we define as a characteristic that is not directly measurable bu ...
11:35 am Tetralogy of Fallot - Factors Affecting Pulmonary Valve
11:35 am Tetralogy of Fallot - Factors Affecting Pulmonary Valve

... The current indications are based on the available evidence analyzing pre-PVR markers of post-PVR normalization of RV size or function: I. Asymptomatic patients with ≥2 of the following quantitative criteria: • Phenotype Indicators for PVR: a. RV end-diastolic volume index >150 mL/m2 or z score >4. ...
Understanding your child`s heart Pulmonary atresia with intact
Understanding your child`s heart Pulmonary atresia with intact

... looked after under a ‘shared care’ system (some general hospitals have paediatricians who have had special training in cardiology). This means that your child will be looked after locally, but will go to the specialist centre for specialised treatment. (See page 24 for information about claiming tra ...
HOME BIRTH COMMUNITY Pulse Oximetry Screening for Critical Congenital Heart Disease in the
HOME BIRTH COMMUNITY Pulse Oximetry Screening for Critical Congenital Heart Disease in the

... congestive heart failure can result. This syndrome also is commonly seen with an atrial septal defect, or ASD (a hole in the wall dividing the two upper chambers of the heart). ...
Diastolic closure rate of normal mitral valve - Heart
Diastolic closure rate of normal mitral valve - Heart

Rapidly detecting disorder in rhythmic biological signals: A spectral
Rapidly detecting disorder in rhythmic biological signals: A spectral

... series of spectral entropies. Note that this measure is not cardiac specific and can be applied to any event series. For example, a sine wave having period an integer fraction of L␶ will be represented in Fourier space by a ␦ function 共for L␶ → ⬁兲 centered at its fundamental frequency; this gives th ...
Medical Policy Heart/Lung Transplant
Medical Policy Heart/Lung Transplant

... CPT Codes / HCPCS Codes / ICD-9 Codes The following codes are included below for informational purposes. Inclusion or exclusion of a code does not constitute or imply member coverage or provider reimbursement. Please refer to the member’s contract benefits in effect at the time of service to determi ...
IN UTERO FUNCTION FOLLOWING GESTATIONAL EXPOSURE TO DIMETHADIONE, THE N-DEMETHYLATED METABOLITE OF
IN UTERO FUNCTION FOLLOWING GESTATIONAL EXPOSURE TO DIMETHADIONE, THE N-DEMETHYLATED METABOLITE OF

... pathologies later in life. In these individuals, the development of further cardiac disease may be attributed to the disruption of the gene programs related to the initial structural defect because these same genes control cardiac function postnatally (described in Section 1.4). Thus, all VSD patien ...
Sequential segmental analysis in complex fetal cardiac
Sequential segmental analysis in complex fetal cardiac

... artery connects to which ventricle. To describe ventriculoarterial connections, the echocardiographic features used to distinguish aorta, pulmonary trunk and common arterial trunk have to be known. The aorta is the great artery that gives branches to the head, neck and arm arteries and coronary arte ...
Left Ventricular Systolic and Diastolic Function
Left Ventricular Systolic and Diastolic Function

... measurement of both diastolic events timing and diastolic parameters. Ejection fraction was calculated in the usual manner. Peak emptying rate was defined as the negative peak of the first derivative curve during systole and was expressed in end-diastolic volume (EDV)/s. Likewise, peak filling rate ...
MRI SureScan®Pacing Systems
MRI SureScan®Pacing Systems

... – Bradycardia-tachycardia syndrome to prevent symptomatic bradycardia or some forms of symptomatic tachyarrhythmias The device is also indicated for dual chamber and atrial tracking modes in patients who may benefit from maintenance of AV synchrony. Dual chamber modes are specifically indicated ...
Prognostic Factors in Patients with Congestive Heart Failure
Prognostic Factors in Patients with Congestive Heart Failure

... In other studies, the opposite was observed. In the prevention substudy of the SOLVD investigators 9, women, who comprised 26% of the total patient population, had an annual mortality rate significantly higher than that of men (22% compared to 17%) and a higher rate of hospitalization due to CHF (33 ...
Anisotropic Conduction in Electrocardiology
Anisotropic Conduction in Electrocardiology

... at a rate of about 60-100 times per minute without any neural stimulation [61]. The SA node is also known as the natural or primary pacemaker of the heart because it sets the rate and the basic rhythm of the heart [28, 29]. Each electrical impulse that enters the SA node, moves through the walls of ...
Modelling fibre orientation of the left ventricular human heart wall
Modelling fibre orientation of the left ventricular human heart wall

... The heart wall is the active muscle tissue of the heart. This thesis focuses on just one of the heart cavities and the surrounding muscle tissue. Therefore, in this thesis, the term wall extends to the tissue separating the cavities. The left ventricle is one of four cavities in the heart, two atria ...
"Cough, goddamn it!": A fearful mishap leads to the revolutionary
"Cough, goddamn it!": A fearful mishap leads to the revolutionary

... laboratory, having learned the technique at the Henry Ford Hospital in Detroit. Complementing cardiac catheterization with angiocardiography, his work initially involved congenital heart disorders in children, and rheumatic heart disease in adults. The catheterization laboratory in the basement of t ...
Comparison of pulmonary uptake with transient cavity dilation after
Comparison of pulmonary uptake with transient cavity dilation after

... they occurred and corrected for the radius of the short axis section to adjust for relative defect size in relation to the entire left ventricle. A redistribution score was calculated in an analogous manner from the redistribution images and the stress defect score. A size index was calculated from ...
The Cardiovascular System The Heart
The Cardiovascular System The Heart

Advising a cardiac disease gene positive yet phenotype negative or
Advising a cardiac disease gene positive yet phenotype negative or

... at interfamilial and intrafamilial levels, suggesting that epigenetic factors as well as environmental factors may act on the severity of the phenotype.12 However, the variability in the disease severity is accentuated between families by a great genetic heterogeneity with multiple genes, multiples ...
Angiotensin-Converting Enzyme and Angiotensinogen Gene
Angiotensin-Converting Enzyme and Angiotensinogen Gene

... eart rate variability (HRV), defined as spontaneous fluctuations in sinus rate due to internal and H external body processes, is an indicator of risk for ...
< 1 ... 154 155 156 157 158 159 160 161 162 ... 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