Regulation of atrial natriuretic peptide
... of β-adrenoceptors, raised sodium concentration, angiotensin-II and endothelin. ANP binds to three cell surface receptors called ANP receptors. The overall effect of ANP on the body is to counter increases in blood pressure and volume caused by the renin-angiotensin system. It has also been reported ...
... of β-adrenoceptors, raised sodium concentration, angiotensin-II and endothelin. ANP binds to three cell surface receptors called ANP receptors. The overall effect of ANP on the body is to counter increases in blood pressure and volume caused by the renin-angiotensin system. It has also been reported ...
Myofiber prestretch magnitude determines regional systolic function
... contraction, depressed pump function, and chronic ventricular remodeling (27, 40). Badke and coworkers (4) first described the effects of ectopic activation on regional mechanics in normal hearts. During ventricular epicardial pacing, early shortening (prior to aortic valve opening) occurs near the ...
... contraction, depressed pump function, and chronic ventricular remodeling (27, 40). Badke and coworkers (4) first described the effects of ectopic activation on regional mechanics in normal hearts. During ventricular epicardial pacing, early shortening (prior to aortic valve opening) occurs near the ...
A review of heart chamber segmentation for structural and functional
... because the calculation of these indices requires delineation of the cardiac boundaries, we will review the most recent state-of-the art techniques for the automatic segmentation of the various cardiac structures. These techniques have the advantage of delineating these boundaries of the heart more ...
... because the calculation of these indices requires delineation of the cardiac boundaries, we will review the most recent state-of-the art techniques for the automatic segmentation of the various cardiac structures. These techniques have the advantage of delineating these boundaries of the heart more ...
Pacemakers - British Heart Foundation
... A pacemaker contains a pulse generator (the pacemaker box) and one, two or three electrode leads. These leads are thin pieces of insulated wire that deliver electrical impulses to and from the heart. Pacemakers with one lead are called single-chamber pacemakers. Pacemakers with two leads are called ...
... A pacemaker contains a pulse generator (the pacemaker box) and one, two or three electrode leads. These leads are thin pieces of insulated wire that deliver electrical impulses to and from the heart. Pacemakers with one lead are called single-chamber pacemakers. Pacemakers with two leads are called ...
The ECGs that will be read around the world—and save lives of
... abnormal findings suggestive of pathology. On 13–14 February 2012, an international group of experts in sports cardiology and sports medicine convened in Seattle, Washington, to define contemporary standards for ECG interpretation in athletes. The objective of the meeting was to develop a comprehensiv ...
... abnormal findings suggestive of pathology. On 13–14 February 2012, an international group of experts in sports cardiology and sports medicine convened in Seattle, Washington, to define contemporary standards for ECG interpretation in athletes. The objective of the meeting was to develop a comprehensiv ...
Cardiac - JRC-DMS
... Copyright © 2016 Joint Review Committee on Education in Diagnostic Medical Sonography (JRC-DMS). All rights reserved. Return to Table of Contents» ...
... Copyright © 2016 Joint Review Committee on Education in Diagnostic Medical Sonography (JRC-DMS). All rights reserved. Return to Table of Contents» ...
Alcohol Septal Ablation in Hypertrophic Obstructive Cardiomyopathy
... graphy is repeated after alcohol injection in order to identify the alcohol impregnation of the target septal area.38 The amount of injected alcohol depends principally on the echocardiographically estimated size of the contrasted septal area and less on the acute haemodynamic effect. This has gradu ...
... graphy is repeated after alcohol injection in order to identify the alcohol impregnation of the target septal area.38 The amount of injected alcohol depends principally on the echocardiographically estimated size of the contrasted septal area and less on the acute haemodynamic effect. This has gradu ...
Left Anterior Hemiblock Obscuring the Diagnosis of
... examination demonstrated that the spells were related to occlusive lesions in thae left carotid and vertebrobasilar arteries. The electrocardiographic study revealed RBBB with intermittent LAH (fig. 2). Figure 3A was prepared in such a way that in every lead the first beat shows LAH (plus RBBB): and ...
... examination demonstrated that the spells were related to occlusive lesions in thae left carotid and vertebrobasilar arteries. The electrocardiographic study revealed RBBB with intermittent LAH (fig. 2). Figure 3A was prepared in such a way that in every lead the first beat shows LAH (plus RBBB): and ...
New diagnostics in forensic pathology Franklin R.W. van de Goot
... a scale must always be present. This is necessary in case microscopic results contradict the expected age of the injury. The macroscopic examination of an injury can provide information on whether the samples taken are representative for the injury. Subsequently, wound tissue specimens can be taken ...
... a scale must always be present. This is necessary in case microscopic results contradict the expected age of the injury. The macroscopic examination of an injury can provide information on whether the samples taken are representative for the injury. Subsequently, wound tissue specimens can be taken ...
cardiovascular magnetic resonance and computed
... or both. The chronic hyperglycemia of diabetes is associated with longterm damage, dysfunction, and failure of different organs, especially the eyes, kidneys, nerves, heart, and blood vessels. The causes of diabetes are multiple. Both genetic and environmental factors play roles in its etiology. The ...
... or both. The chronic hyperglycemia of diabetes is associated with longterm damage, dysfunction, and failure of different organs, especially the eyes, kidneys, nerves, heart, and blood vessels. The causes of diabetes are multiple. Both genetic and environmental factors play roles in its etiology. The ...
ATP-Sensitive Potassium Channel Blocker HMR 1883 Reduces
... the left ventricle. The nonstained ischemic areas and the bluestained normal areas of the right ventricular free wall and of the left ventricle plus septum were dissected and weighed separately. The size of the ischemic zones were expressed as the percentage of the total left or right ventricular ti ...
... the left ventricle. The nonstained ischemic areas and the bluestained normal areas of the right ventricular free wall and of the left ventricle plus septum were dissected and weighed separately. The size of the ischemic zones were expressed as the percentage of the total left or right ventricular ti ...
2015 ACC/AHA/HRS guideline for the
... by the ACC, AHA, and Heart Rhythm Society (HRS). References selected and published in this document are representative and not all-inclusive. An independent ERC was commissioned to perform a systematic review of key clinical questions, the results of which were considered by the GWC for incorporatio ...
... by the ACC, AHA, and Heart Rhythm Society (HRS). References selected and published in this document are representative and not all-inclusive. An independent ERC was commissioned to perform a systematic review of key clinical questions, the results of which were considered by the GWC for incorporatio ...
The Brugada ECG Pattern - Circulation: Arrhythmia and
... Currently, symptomatic treatment with implantable cardioverterdefibrillators (ICDs) is the mainstay in the prevention of sudden cardiac death,3 although it is costly and associated with a high risk of complications.4 The pathophysiological mechanism of the Brugada syndrome remains elusive,5 and no s ...
... Currently, symptomatic treatment with implantable cardioverterdefibrillators (ICDs) is the mainstay in the prevention of sudden cardiac death,3 although it is costly and associated with a high risk of complications.4 The pathophysiological mechanism of the Brugada syndrome remains elusive,5 and no s ...
Magnetic resonance imaging for ischemic heart disease
... stress-induced subendocardial hypoperfusion from a dark subendocardial artifact. Recent studies demonstrated that first-pass perfusion MRI with pharmacological stress allows the detection of hemodynamically significant CAD with high diagnostic accuracy. Schwitter et al (22) obtained stress perfusion M ...
... stress-induced subendocardial hypoperfusion from a dark subendocardial artifact. Recent studies demonstrated that first-pass perfusion MRI with pharmacological stress allows the detection of hemodynamically significant CAD with high diagnostic accuracy. Schwitter et al (22) obtained stress perfusion M ...
Role of trans-thoracic impedance and current for a successful
... Abstract The thesis examines the effect of transthoracic impedance (TTI) on the success rate of synchronized cardioversion, using retrospective analysis on clinical data and numerical model. Synchronized electrical cardioversion is a treatment that applies an electrical pulse to the cardiac tissue ...
... Abstract The thesis examines the effect of transthoracic impedance (TTI) on the success rate of synchronized cardioversion, using retrospective analysis on clinical data and numerical model. Synchronized electrical cardioversion is a treatment that applies an electrical pulse to the cardiac tissue ...
Review
... Table 1 describes the included studies, and Appendix Table 1 (available at www.annals.org) provides further information. Four studies were published in abstract form only (37, 58, 66, 91). One report (78) described 2 separate trials, and data from 1 trial were distributed in 2 reports (84, 85). Thre ...
... Table 1 describes the included studies, and Appendix Table 1 (available at www.annals.org) provides further information. Four studies were published in abstract form only (37, 58, 66, 91). One report (78) described 2 separate trials, and data from 1 trial were distributed in 2 reports (84, 85). Thre ...
NIH Public Access
... Trans-thoracic echocardiography is used in D-TGA to confirm the prenatal diagnosis and obtain details of the anatomy. Malaligned commissures and a single coronary ostium have been associated with late coronary events and death after ASO [26]. Prostaglandin therapy Most hypoxemic neonates with D-TGA ...
... Trans-thoracic echocardiography is used in D-TGA to confirm the prenatal diagnosis and obtain details of the anatomy. Malaligned commissures and a single coronary ostium have been associated with late coronary events and death after ASO [26]. Prostaglandin therapy Most hypoxemic neonates with D-TGA ...
Cold acclimation alters the connective tissue content of the zebrafish
... the spongy myocardium will therefore increase the amount of blood pumped per beat (Klaiman et al., 2011). Previous work suggests that such changes are responsible for cold-acclimated (5°C) trout having a greater, or equal, stroke volume compared with warm-acclimated (15°C) trout (Graham and Farrell, ...
... the spongy myocardium will therefore increase the amount of blood pumped per beat (Klaiman et al., 2011). Previous work suggests that such changes are responsible for cold-acclimated (5°C) trout having a greater, or equal, stroke volume compared with warm-acclimated (15°C) trout (Graham and Farrell, ...
Influence of pacing site on canine left ventricular contraction
... between them for the remainder of the cardiac cycle. This indicates that the peak of the R wave is a poor indicator of the start of mechanical contraction. The similarity of these curves was quantified by determining the Qms from the atria1 curve as outlined in METHODS. All of the normalized pressur ...
... between them for the remainder of the cardiac cycle. This indicates that the peak of the R wave is a poor indicator of the start of mechanical contraction. The similarity of these curves was quantified by determining the Qms from the atria1 curve as outlined in METHODS. All of the normalized pressur ...
Monitoring the incidence of cardiovascular disease in Australia (AIHW)
... 6.2.3 Collection and reliability of data ................................................................ 72 6.2.4 Transfers ...................................................................................................... 73 6.2.5 Other issues .................................................. ...
... 6.2.3 Collection and reliability of data ................................................................ 72 6.2.4 Transfers ...................................................................................................... 73 6.2.5 Other issues .................................................. ...
Atrial structure and fibres: morphologic bases of atrial conduction
... pulmonary veins being more superiorly located than those of the right pulmonary veins. In the human, it is most common to find two orifices on each side (Fig. 1B). Sometimes, two veins of one, or both, sides are united prior to their entry to the atrium. In others, an additional vein is found, more ...
... pulmonary veins being more superiorly located than those of the right pulmonary veins. In the human, it is most common to find two orifices on each side (Fig. 1B). Sometimes, two veins of one, or both, sides are united prior to their entry to the atrium. In others, an additional vein is found, more ...
Regional Distribution of the Molecular Forms of Acetylcholinesterase
... molecular forms that differ in their quaternary structure and mode of attachment to the cell surface. The distribution of the individual molecular forms of AChE in various cardiac regions with distinct anatomical characteristics was investigated. The results confirmed those of others by showing that ...
... molecular forms that differ in their quaternary structure and mode of attachment to the cell surface. The distribution of the individual molecular forms of AChE in various cardiac regions with distinct anatomical characteristics was investigated. The results confirmed those of others by showing that ...
View/Open
... to be equivalent to a single resultant dipole whose magnitude and direction determines degree of deflection obtained by connecting a recording instrument to any two body points. ...
... to be equivalent to a single resultant dipole whose magnitude and direction determines degree of deflection obtained by connecting a recording instrument to any two body points. ...
Hypertrophic Cardiomyopathy: A Systematic Review
... However, not all individuals harboring a genetic defect will express the clinical features of HCM, such as LVH by echocardiography, abnormal ECG results, or cardiac symptoms.3,9,13,25,29,51-53 Molecular genetic studies have, in fact, demonstrated that there is no minimum wall thickness required for ...
... However, not all individuals harboring a genetic defect will express the clinical features of HCM, such as LVH by echocardiography, abnormal ECG results, or cardiac symptoms.3,9,13,25,29,51-53 Molecular genetic studies have, in fact, demonstrated that there is no minimum wall thickness required for ...
How to Use An AED - Palm Beach State College
... For both infants and children, conventional CPR is given at a rate of 30 compressions followed by 2 rescue breaths (100 compressions/minute). In all cases, conventional CPR starts with compressions first! Then the breathing. ...
... For both infants and children, conventional CPR is given at a rate of 30 compressions followed by 2 rescue breaths (100 compressions/minute). In all cases, conventional CPR starts with compressions first! Then the breathing. ...
Cardiac contractility modulation
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Cardiac contractility modulation (CCM) is a treatment for patients with moderate to severe left ventricular systolic heart failure (NYHA class II–IV). The short- and long-term use of this therapy enhances both the strength of ventricular contraction and the heart’s pumping capacity. The CCM mechanism is based on stimulation of the cardiac muscle by non-excitatory electrical signals (NES). CCM treatment is delivered by a pacemaker-like device that applies the NES, adjusted to and synchronized with the electrical action in the cardiac cycle.In CCM therapy, electrical stimulation is applied to the cardiac muscle during the absolute refractory period. In this phase of the cardiac cycle, electrical signals cannot trigger new cardiac muscle contractions, hence this type of stimulation is known as a non-excitatory stimulation. However, the electrical CCM signals increase the influx of calcium ions into the cardiac muscle cells (cardiomyocytes). In contrast to other electrical stimulation treatments for heart failure, such as pacemaker therapy or implantable cardioverter defibrillators (ICD), CCM does not affect the cardiac rhythm directly. Rather, the aim is to enhance the heart’s natural contraction (the native cardiac contractility) sustainably over long periods of time. Furthermore, unlike most interventions that increase cardiac contractility, CCM is not associated with an unfavorable increase in oxygen demand by the heart (measured in terms of Myocardial Oxygen Consumption or MVO2). This may be explained by the beneficial effect CCM has in improving cardiac efficiency. A meta-analysis in 2014 and an overview of device-based treatment options in heart failure in 2013 concluded that CCM treatment is safe, that it is generally beneficial to patients and that CCM treatment increases the exercise tolerance (ET) and quality of life (QoL) of patients. Furthermore, preliminary long-term survival data shows that CCM is associated with lower long-term mortality in heart failure patients when compared with expected rates among similar patients not treated with CCM.