Correlation of Atrial Natriuretic Peptide and Cyclic
... elevated left ventricular filling pressures in these patients (data not shown), another factor involved in elevated atrial natriuretic peptide or cGMP plasma concentrations in patients after heart transplantation might be impaired ventricular filling, despite normal systolic ventricular function (20 ...
... elevated left ventricular filling pressures in these patients (data not shown), another factor involved in elevated atrial natriuretic peptide or cGMP plasma concentrations in patients after heart transplantation might be impaired ventricular filling, despite normal systolic ventricular function (20 ...
Atrial pressure and secretion of atrial natriuretic factor into
... from both atria and ventricles of the recipient's heart 10 minutes after surgical excision. Samples were frozen and tissue atrial natriuretic factor concentration was determined by a method previously described (40). Preparation of human plasma samples. Blood samples were drawn into plastic syringes ...
... from both atria and ventricles of the recipient's heart 10 minutes after surgical excision. Samples were frozen and tissue atrial natriuretic factor concentration was determined by a method previously described (40). Preparation of human plasma samples. Blood samples were drawn into plastic syringes ...
Congenital Aneurysm of the Sinus of Valsalva
... and when VSD is present, AR usually results from a prolapsed cusp , and when VSD is not present , AR usually arises from other valve abnormalities • Pulmonary stenosis is uncommon, but small gradients are common. • Others are uncommonly, but any defects including COA, PDA, ASD, subaortic stenosis & ...
... and when VSD is present, AR usually results from a prolapsed cusp , and when VSD is not present , AR usually arises from other valve abnormalities • Pulmonary stenosis is uncommon, but small gradients are common. • Others are uncommonly, but any defects including COA, PDA, ASD, subaortic stenosis & ...
Postural Variation in Second Sound Splitting
... Auscultation of the second heart sound is especially helpful in the diagnosis of congenital heart disease. It remains an important clinical means of differentiating the Eisenmenger form of atrial septa1 defect ( ASD ), from other causes of Eisenmenger's syndrome.1° In the former the splitting is mor ...
... Auscultation of the second heart sound is especially helpful in the diagnosis of congenital heart disease. It remains an important clinical means of differentiating the Eisenmenger form of atrial septa1 defect ( ASD ), from other causes of Eisenmenger's syndrome.1° In the former the splitting is mor ...
Pulmonary Hypertension
... hypertension seen in our referral practice.7 It is presumed that the mechanism of both is similar. Specifically, a chronic elevation in the diastolic filling pressure of the left heart causes a backward transmission of the pressure to the pulmonary venous system, which triggers vasoconstriction in t ...
... hypertension seen in our referral practice.7 It is presumed that the mechanism of both is similar. Specifically, a chronic elevation in the diastolic filling pressure of the left heart causes a backward transmission of the pressure to the pulmonary venous system, which triggers vasoconstriction in t ...
Catheter Ablation in New Zealand
... defined population subgroups. Its role in the treatment of atrial fibrillation (AF) is less clear, but as AF is the commonest adult arrhythmia the potential increase in demand is significant. Atrial fibrillation affects 2.0% of the New Zealand population. It is more common in Maori, in whom it occur ...
... defined population subgroups. Its role in the treatment of atrial fibrillation (AF) is less clear, but as AF is the commonest adult arrhythmia the potential increase in demand is significant. Atrial fibrillation affects 2.0% of the New Zealand population. It is more common in Maori, in whom it occur ...
Focal atrial tachycardia
... FAT has been reported in subjects with structurally normal hearts as well as in patients with ischemic or congenital heart disease, hypertrophic cardiomyopathy, atrial tumors, myocarditis, septal or appendage aneurysms and valvular, metabolic and bronchopulmonary diseases.4,32-37 The clinical presen ...
... FAT has been reported in subjects with structurally normal hearts as well as in patients with ischemic or congenital heart disease, hypertrophic cardiomyopathy, atrial tumors, myocarditis, septal or appendage aneurysms and valvular, metabolic and bronchopulmonary diseases.4,32-37 The clinical presen ...
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» ...
Chapter_031 - IHMC Public Cmaps (2)
... • Allows blood to be shunted from left to right due to higher pressure of the left atrial chamber and lower pulmonary vascular resistance as compared to systemic vascular resistance • Right atrial enlargement ...
... • Allows blood to be shunted from left to right due to higher pressure of the left atrial chamber and lower pulmonary vascular resistance as compared to systemic vascular resistance • Right atrial enlargement ...
1 PULMONARY HYPERTENSION Robyn J. Barst, MD I
... The pathology of pulmonary vascular disease was first classified in the 1950s by Heath and Edwards (Table 5). Unfortunately, this pathologic classification does not correlate well with the pathobiology or clinical and hemodynamic findings of pulmonary hypertension. The vascular endothelium is an imp ...
... The pathology of pulmonary vascular disease was first classified in the 1950s by Heath and Edwards (Table 5). Unfortunately, this pathologic classification does not correlate well with the pathobiology or clinical and hemodynamic findings of pulmonary hypertension. The vascular endothelium is an imp ...
Review Article Frequency Analysis Of Atrial Fibrillation
... exhibits large inter-individual variability. The reason is, that the same frequency difference results in larger cycle length differences for low frequencies compared to high frequencies. Method Validation and Reproducibility A direct comparison between endocardially recorded electrograms and body s ...
... exhibits large inter-individual variability. The reason is, that the same frequency difference results in larger cycle length differences for low frequencies compared to high frequencies. Method Validation and Reproducibility A direct comparison between endocardially recorded electrograms and body s ...
Effect of Acutely Increased Right Ventricular Afterload on Work
... Left ventricular stroke work, the energy output from the left ventricular chamber during contraction, has recently been shown to be a linear function of the end-diastolic volume in conscious dogs.32 If the effects of altered right ventricular loading conditions on left ventricular systolic function ...
... Left ventricular stroke work, the energy output from the left ventricular chamber during contraction, has recently been shown to be a linear function of the end-diastolic volume in conscious dogs.32 If the effects of altered right ventricular loading conditions on left ventricular systolic function ...
Atrial Natriuretic Factor
... atrial natriuretic factor n. a peptide hormone released from cardiac atrial tissue that causes increased elimination of sodium by the kidney. ATRIAL NATRIURETIC FACTOR (ANF) | CANADIANS FOR HEALTH ... Sun, 23 Apr 2017 00:24:00 GMT in 1968, i started a project at queen's university aimed at unravelli ...
... atrial natriuretic factor n. a peptide hormone released from cardiac atrial tissue that causes increased elimination of sodium by the kidney. ATRIAL NATRIURETIC FACTOR (ANF) | CANADIANS FOR HEALTH ... Sun, 23 Apr 2017 00:24:00 GMT in 1968, i started a project at queen's university aimed at unravelli ...
Endocardial mapping of atrial fibrillation in the human right atrium
... fibrillation by creating a line of block across the TA-inferior vena cava isthmus. (b) A postero-anterior radiograph showing the multielectrode array (B) deployed in the right atrium and canted over towards the tricuspid annulus by a guide wire passed through the central lumen and out through the ri ...
... fibrillation by creating a line of block across the TA-inferior vena cava isthmus. (b) A postero-anterior radiograph showing the multielectrode array (B) deployed in the right atrium and canted over towards the tricuspid annulus by a guide wire passed through the central lumen and out through the ri ...
Interventricular Septal Thickness and Left Ventricular Hypertrophy
... 10. Barnes GE, Bishop VS, Horwitz LD, Kasper RL: The maximum derivatives of left ventricular pressure and transverse internal diameter as indices of the inotropic state of the left ventricle in conscious dogs. J Physiol 235: 571, 1973 11. Horwitz LD: Effects of intravenous anesthetic agents on left ...
... 10. Barnes GE, Bishop VS, Horwitz LD, Kasper RL: The maximum derivatives of left ventricular pressure and transverse internal diameter as indices of the inotropic state of the left ventricle in conscious dogs. J Physiol 235: 571, 1973 11. Horwitz LD: Effects of intravenous anesthetic agents on left ...
Interventricular Septal Thickness and Left Ventricular
... 10. Barnes GE, Bishop VS, Horwitz LD, Kasper RL: The maximum derivatives of left ventricular pressure and transverse internal diameter as indices of the inotropic state of the left ventricle in conscious dogs. J Physiol 235: 571, 1973 11. Horwitz LD: Effects of intravenous anesthetic agents on left ...
... 10. Barnes GE, Bishop VS, Horwitz LD, Kasper RL: The maximum derivatives of left ventricular pressure and transverse internal diameter as indices of the inotropic state of the left ventricle in conscious dogs. J Physiol 235: 571, 1973 11. Horwitz LD: Effects of intravenous anesthetic agents on left ...
Cardiac Pumping and the Function of Ventricular
... found that by the contraction of the ventricles the AV‐plane and apex move nearer to one another. Ventricular filling is affected by an "in‐rush" of blood during diastole [106]. Lower gives an explanation for the walls of the right ventricle being thinner than those of the left. He also had quite ...
... found that by the contraction of the ventricles the AV‐plane and apex move nearer to one another. Ventricular filling is affected by an "in‐rush" of blood during diastole [106]. Lower gives an explanation for the walls of the right ventricle being thinner than those of the left. He also had quite ...
ANTIARRHYTHMIC THERAPY FOR ATRIAL
... Summary. Antiarrhythmic therapy can have a key role in prolonging the lives of patients with most common atrial tachyarrhythmias such as atrial flutter (AFL) or atrial fibrillation (AF). The optimal use of antiarrhytmic drug therapy depends in part on understanding the underlying mechanisms of AFL a ...
... Summary. Antiarrhythmic therapy can have a key role in prolonging the lives of patients with most common atrial tachyarrhythmias such as atrial flutter (AFL) or atrial fibrillation (AF). The optimal use of antiarrhytmic drug therapy depends in part on understanding the underlying mechanisms of AFL a ...
Left Septal Fascicular Block
... fascicles). However, the middle anteroseptal fibers are thought by some authors to represent another division (2, 3). In fact, the experimental work of Durrer in human heart(See next slide) demonstrated that there are 3 points of activation onset in the left ventricular human heart, favouring the qu ...
... fascicles). However, the middle anteroseptal fibers are thought by some authors to represent another division (2, 3). In fact, the experimental work of Durrer in human heart(See next slide) demonstrated that there are 3 points of activation onset in the left ventricular human heart, favouring the qu ...
Alcohol Septal Ablation in Hypertrophic Obstructive Cardiomyopathy
... side effects that preclude optimal medication.5 The haemodynamic indication requires a significant obstruction either at rest or under provocation. The absolute gradient level criteria were originally set higher than is currently accepted as an indication (≥30 mmHg at rest or ≥60 mmHg under provocat ...
... side effects that preclude optimal medication.5 The haemodynamic indication requires a significant obstruction either at rest or under provocation. The absolute gradient level criteria were originally set higher than is currently accepted as an indication (≥30 mmHg at rest or ≥60 mmHg under provocat ...
Utility of the surface electrocardiogram for confirming right
... right ventricular septal versus apical pacing on left ventricular synchrony and function in patients with second- or third-degree heart block. Am J Cardiol 2009;103: ...
... right ventricular septal versus apical pacing on left ventricular synchrony and function in patients with second- or third-degree heart block. Am J Cardiol 2009;103: ...
Acute Right Atrial and Ventricular Infarction
... a) lower oxygen demand in the right ventricular myocardium; b) much higher systolic-diastolic coronary blood flow ratio in the arteries that perfuse the right ventricle13; c) greater capacity of the right ventricle to extract oxygen under conditions of hemodynamic stress14; d) probable direct perfus ...
... a) lower oxygen demand in the right ventricular myocardium; b) much higher systolic-diastolic coronary blood flow ratio in the arteries that perfuse the right ventricle13; c) greater capacity of the right ventricle to extract oxygen under conditions of hemodynamic stress14; d) probable direct perfus ...
Special Report
... the population, increased surveillance, and improved survival in patients with comorbid conditions all likely contribute to the increase in AF prevalence. Surprisingly little is known about the epidemiology, risk factors, prognosis, and temporal trends for AF in developing countries and nonwhite eth ...
... the population, increased surveillance, and improved survival in patients with comorbid conditions all likely contribute to the increase in AF prevalence. Surprisingly little is known about the epidemiology, risk factors, prognosis, and temporal trends for AF in developing countries and nonwhite eth ...
Essentials of Anatomy and Physiology, 9e (Marieb)
... D) split off the pulmonary trunk E) return blood to the right atrium of the heart Answer: C Diff: 3 ...
... D) split off the pulmonary trunk E) return blood to the right atrium of the heart Answer: C Diff: 3 ...
Final Public Summary Document - Word 100 KB
... These were only reported in patients treated with surgical closure. In a number of the cases in the transcatheter group, subjects developed complete atrioventricular block (AVB) during the procedure. In these cases the catheterisation procedure was aborted and surgical VSD closure undertaken. In onl ...
... These were only reported in patients treated with surgical closure. In a number of the cases in the transcatheter group, subjects developed complete atrioventricular block (AVB) during the procedure. In these cases the catheterisation procedure was aborted and surgical VSD closure undertaken. In onl ...
Atrial septal defect
Atrial septal defect (ASD) is a congenital heart defect in which blood flows between the atria (upper chambers) of the heart. Normally, the atria are separated by a dividing wall, the interatrial septum. If this septum is defective or absent, then oxygen-rich blood can flow directly from the left side of the heart to mix with the oxygen-poor blood in the right side of the heart, or vice versa. This can lead to lower-than-normal oxygen levels in the arterial blood that supplies the brain, organs, and tissues. However, an ASD may not produce noticeable signs or symptoms, especially if the defect is small.A ""shunt"" is the presence of a net flow of blood through the defect, either from left to right or right to left. The amount of shunting present, if any, determines the hemodynamic significance of the ASD. A ""right-to-left-shunt"" typically poses the more dangerous scenario.During development of the fetus, the interatrial septum develops to separate the left and right atria. However, a hole in the septum called the foramen ovale, allows blood from the right atrium to enter the left atrium during fetal development. This opening allows blood to bypass the nonfunctional fetal lungs while the fetus obtains its oxygen from the placenta. A layer of tissue called the septum primum acts as a valve over the foramen ovale during fetal development. After birth, the pressure in the right side of the heart drops as the lungs open and begin working, causing the foramen ovale to close entirely. In approximately 25% of adults, the foramen ovale does not entirely seal. In these cases, any elevation of the pressure in the pulmonary circulatory system (due to pulmonary hypertension, temporarily while coughing, etc.) can cause the foramen ovale to remain open. This is known as a patent foramen ovale (PFO), which is a type of atrial septal defect.