![Absent right and persistent left superior vena cava](http://s1.studyres.com/store/data/004619175_1-d809e518a2a3bfc6fc7c406c396c0e50-300x300.png)
Absent right and persistent left superior vena cava
... heart disease. The incidence of an absent right superior vena cava in the setting of a persistent left superior vena cava is very rare in the general population with only a dozen cases documented in the medical literature. Such venous anomalies can make for very challenging electronic cardiac device ...
... heart disease. The incidence of an absent right superior vena cava in the setting of a persistent left superior vena cava is very rare in the general population with only a dozen cases documented in the medical literature. Such venous anomalies can make for very challenging electronic cardiac device ...
Is the time constant of the pulmonary circulation truly constant?
... I read with great interest the recent article by DELCROIX et al. [1] on vascular and right ventricular remodelling in chronic thromboembolic pulmonary hypertension (CTEPH). I found it very informative; however, I would like to comment on some of the statements that were made. In relation to pulmonar ...
... I read with great interest the recent article by DELCROIX et al. [1] on vascular and right ventricular remodelling in chronic thromboembolic pulmonary hypertension (CTEPH). I found it very informative; however, I would like to comment on some of the statements that were made. In relation to pulmonar ...
Sequence of Atrial Depolarization at Different Stages of
... confirmation of these findings could be made under the microscope, especially toward the end of each experiment, when the asynchronism between left and right atrial contraction was more easily noticeable. Intervals between the two atrial components as well as the P-R intervals were measured in all c ...
... confirmation of these findings could be made under the microscope, especially toward the end of each experiment, when the asynchronism between left and right atrial contraction was more easily noticeable. Intervals between the two atrial components as well as the P-R intervals were measured in all c ...
A persistent left superior vena cava
... oxygenated blood to the embryo; and (c) the cardinal veins, draining the body of the embryo proper (Fig 3). Initially, the cardinal veins form the main venous drainage system of the embryo. This system consists of the anterior cardinal veins, which drain the cephalic part of the embryo, and the post ...
... oxygenated blood to the embryo; and (c) the cardinal veins, draining the body of the embryo proper (Fig 3). Initially, the cardinal veins form the main venous drainage system of the embryo. This system consists of the anterior cardinal veins, which drain the cephalic part of the embryo, and the post ...
chapter 22 cardiopulmonary and right-left heart interactions
... output were related to intrathoracic pressure. Positive-pressure ventilation via a mask in conscious volunteers led to a fall in cardiac output of approximately 10% to 15%. This was initially thought to be entirely due to changes in systemic venous return (and reduced ventricular preload) imposed by ...
... output were related to intrathoracic pressure. Positive-pressure ventilation via a mask in conscious volunteers led to a fall in cardiac output of approximately 10% to 15%. This was initially thought to be entirely due to changes in systemic venous return (and reduced ventricular preload) imposed by ...
Pressure and Volume Changes in the Cardiac
... Starter: What animal has the highest blood pressure in the whole wide world? ...
... Starter: What animal has the highest blood pressure in the whole wide world? ...
Introduction to fetal echo
... and pulmonary artery. Here is another change: instead of going through the lungs it will go through a fetal bypass called the ductus and arrive directly into the descending aorta. Since the lungs are not ventilated in utero, passing through them would not oxygenate blood, and only about 10% of the p ...
... and pulmonary artery. Here is another change: instead of going through the lungs it will go through a fetal bypass called the ductus and arrive directly into the descending aorta. Since the lungs are not ventilated in utero, passing through them would not oxygenate blood, and only about 10% of the p ...
Effects of Birth-Related Events on Central Blood Flow Patterns
... closes fully within a few hours after birth (3,4). The two ventricles eject the same volumes once the ductus arteriosus does close. Associated with the increased oxygen requirements after birth, left ventricular output increases 2- to 21/2-fold (5, 6). The specific factors that cause this dramatic c ...
... closes fully within a few hours after birth (3,4). The two ventricles eject the same volumes once the ductus arteriosus does close. Associated with the increased oxygen requirements after birth, left ventricular output increases 2- to 21/2-fold (5, 6). The specific factors that cause this dramatic c ...
Arrhythmia Surgery in Patients With and Without Congenital Heart
... area of slow conduction to an area of no conduction by interrupting the electrical corridor (isthmus) between adjacent obstacles or scars, while preserving sinoatrial and atrioventricular nodal function. A patient with a separate hepatic vein entry into the right atrium, for example, will require cr ...
... area of slow conduction to an area of no conduction by interrupting the electrical corridor (isthmus) between adjacent obstacles or scars, while preserving sinoatrial and atrioventricular nodal function. A patient with a separate hepatic vein entry into the right atrium, for example, will require cr ...
Effects of mitral valve regurgitation in the dog on the right ventricle
... heart is not great as the lesions develop slowly, and the large regurgitant volume is well accommodated for years, as both the LV and LA remodel and remain compliant, accommodating the large volumes (Lord 1976, Pape and others 1991, Pizzarello and others 1984, Zile and others 1991). The amount of re ...
... heart is not great as the lesions develop slowly, and the large regurgitant volume is well accommodated for years, as both the LV and LA remodel and remain compliant, accommodating the large volumes (Lord 1976, Pape and others 1991, Pizzarello and others 1984, Zile and others 1991). The amount of re ...
Innocent Murmur
... risk of atherosclerotic heart disease. It is best heard at the upper right sternal edge and is early to midsystolic. It is likely caused by slight fibrosis of the cusps and dilatation of the aortic root that occur with age. The murmur results from turbulence of blood in the aortic root during maximu ...
... risk of atherosclerotic heart disease. It is best heard at the upper right sternal edge and is early to midsystolic. It is likely caused by slight fibrosis of the cusps and dilatation of the aortic root that occur with age. The murmur results from turbulence of blood in the aortic root during maximu ...
PDF - World Wide Journals
... Book Chapter | 1. Jouannic JM, Picone O, Martinovic J, Fremont L, Dumez Y, Bonnet D. Dimimutivefetal left ventrical at mid-gestation associated with persistent left superior vena cava and coronary sinus dilatation. Ultrasound Obstet Gynecol 2003; 22 (5): 527–30. | 2. Pasquini L, Belmar C, Seale A, G ...
... Book Chapter | 1. Jouannic JM, Picone O, Martinovic J, Fremont L, Dumez Y, Bonnet D. Dimimutivefetal left ventrical at mid-gestation associated with persistent left superior vena cava and coronary sinus dilatation. Ultrasound Obstet Gynecol 2003; 22 (5): 527–30. | 2. Pasquini L, Belmar C, Seale A, G ...
Rupture of Right Sinus of Valsalva Aneurysm with Alternating
... times higher than in females. The most common associated cardiovascular lesions are ventricular septal defects (VSDs) and aortic valve insufficiencies.3 Structural defects are also one of the anomalies observed in association with congenital SVAs, including the bicuspid aortic valve, pulmonary steno ...
... times higher than in females. The most common associated cardiovascular lesions are ventricular septal defects (VSDs) and aortic valve insufficiencies.3 Structural defects are also one of the anomalies observed in association with congenital SVAs, including the bicuspid aortic valve, pulmonary steno ...
Left Atrial Volume Mortality PE
... (excluding the myocardium), and LA. The volume of each cardiac chamber was automatically calculated as the product of a single voxel volume and the sum of all voxels included in it. This approach requires only that the reconstructed images of the entire volume of the chest be uploaded at once at the ...
... (excluding the myocardium), and LA. The volume of each cardiac chamber was automatically calculated as the product of a single voxel volume and the sum of all voxels included in it. This approach requires only that the reconstructed images of the entire volume of the chest be uploaded at once at the ...
ABLACION POR RADIOFRECUENCIA DE LA
... • Although the information comes from observational studies, those with AF + left ventricular dysfunction present an improvement in ejection fraction • Currently, studies on heart failure and ventricular impairment are being developed to assess this phenomenon. ...
... • Although the information comes from observational studies, those with AF + left ventricular dysfunction present an improvement in ejection fraction • Currently, studies on heart failure and ventricular impairment are being developed to assess this phenomenon. ...
Feasibility and efficacy of bypassing the right ventricle and
... Background: Right ventricular failure (RVF) and -support is associated with poor results. We aimed for a new approach of right - sided assistance bypassing the right ventricle and pulmonary circulation in order to better decompress the right ventricle and optimize left ventricular filling. Methods: ...
... Background: Right ventricular failure (RVF) and -support is associated with poor results. We aimed for a new approach of right - sided assistance bypassing the right ventricle and pulmonary circulation in order to better decompress the right ventricle and optimize left ventricular filling. Methods: ...
Influence of Left Ventricular Diastolic Function on Exercise
... Background: Exercise-induced pulmonary hypertension (EIPH) can be caused not only by pulmonary vas‐ culopathy, but also by a significant increase in left ventricular (LV) filling pressure. This study evaluated the influence of LV diastolic function on EIPH in patients with systemic sclerosis (SSc). ...
... Background: Exercise-induced pulmonary hypertension (EIPH) can be caused not only by pulmonary vas‐ culopathy, but also by a significant increase in left ventricular (LV) filling pressure. This study evaluated the influence of LV diastolic function on EIPH in patients with systemic sclerosis (SSc). ...
Communication of Mitral Valve with Both Ventricles Associated with
... In our patient, the exact intracardiac abnormalities were not identified clinically. No special intracardiac studies were done but a diagnosis of ventricular septal defect had been made on a clinical basis. Had right ventriculography been performed, it is assumed that the double outlet right ventric ...
... In our patient, the exact intracardiac abnormalities were not identified clinically. No special intracardiac studies were done but a diagnosis of ventricular septal defect had been made on a clinical basis. Had right ventriculography been performed, it is assumed that the double outlet right ventric ...
Treatment of Atrial Fibrillation in 2017
... pocket made under the skin. The leads are usually placed in a vein near the collarbone, and then moved to the heart with the help of an X-ray machine. The leads touch the heart muscle on one end, and are connected to the pacemaker generator on the other end, programmed to send signals to the heart, ...
... pocket made under the skin. The leads are usually placed in a vein near the collarbone, and then moved to the heart with the help of an X-ray machine. The leads touch the heart muscle on one end, and are connected to the pacemaker generator on the other end, programmed to send signals to the heart, ...
Thioredoxin Catalysis and Inflammasome Regulation
... It is well known that the development of AF requires a “trigger” and an anatomic or functional substrate capable of both initiation and perpetuation of AF [3]. Pulmonary Vein (PV) focal firing may trigger AF, or act as a rapid driver to maintain the arrhythmia. Catheter ablation strategies for the c ...
... It is well known that the development of AF requires a “trigger” and an anatomic or functional substrate capable of both initiation and perpetuation of AF [3]. Pulmonary Vein (PV) focal firing may trigger AF, or act as a rapid driver to maintain the arrhythmia. Catheter ablation strategies for the c ...
October - Congenital Cardiology Today
... will guide future guidelines for clinical management of this rare form of congenital heart disease.” asymptomatic adult ALCAPA cases over the age of 50 years. In contrast to the younger cohort, older patients appear to be better compensated. The risk of sudden death declines progressively in new dia ...
... will guide future guidelines for clinical management of this rare form of congenital heart disease.” asymptomatic adult ALCAPA cases over the age of 50 years. In contrast to the younger cohort, older patients appear to be better compensated. The risk of sudden death declines progressively in new dia ...
M-Mode Echocardiography
... Historically, M-mode (motion mode) was the first effective modality for the ultrasonic evaluation of the heart. M-mode echocardiography provides an ice pick, one-dimensional (depth only) view of the heart.1,2 The ultrasound echoes reflected from the various cardiac interfaces are represented as dots ...
... Historically, M-mode (motion mode) was the first effective modality for the ultrasonic evaluation of the heart. M-mode echocardiography provides an ice pick, one-dimensional (depth only) view of the heart.1,2 The ultrasound echoes reflected from the various cardiac interfaces are represented as dots ...
Atrial Fibrillation - St. Joseph`s Healthcare Hamilton
... normal or sinus rhythm. This is a safe procedure carried out in hospital in a monitored setting with sedation. 3. Atrial fibrillation ablation ...
... normal or sinus rhythm. This is a safe procedure carried out in hospital in a monitored setting with sedation. 3. Atrial fibrillation ablation ...
The Abdominojugular Reflux Sign
... of patients with right ventricular infarction (9). To the extent that Kussmaul’s sign is due to a similar physiology, abdominojugular reflux may have similar predictive ability. The value of this sign in congestive heart failure has been a subject of great controversy (5). In patients with dyspnea, ...
... of patients with right ventricular infarction (9). To the extent that Kussmaul’s sign is due to a similar physiology, abdominojugular reflux may have similar predictive ability. The value of this sign in congestive heart failure has been a subject of great controversy (5). In patients with dyspnea, ...
Full Text - Archives of Cardiovascular Imaging
... right ventricular free wall in patients with left-sided valvular heart disease and pulmonary hypertension. Indeed, we sought to investigate whether we can guess the presence of pulmonary hypertension through the measurement of the TDI of the tricuspid annulus and the deformity indices of the basal s ...
... right ventricular free wall in patients with left-sided valvular heart disease and pulmonary hypertension. Indeed, we sought to investigate whether we can guess the presence of pulmonary hypertension through the measurement of the TDI of the tricuspid annulus and the deformity indices of the basal s ...
Atrial septal defect
![](https://commons.wikimedia.org/wiki/Special:FilePath/Asd-web.jpg?width=300)
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.