Pulmonary vascular wall stiffness: An important contributor to the
... and predict survival in PH. Because of the dominating influence of small artery narrowing on increases in mPAP, a traditional strategy for PH treatment has been to reduce or attempt to reverse this aspect of pulmonary vascular remodeling. However, it is becoming apparent that mPAP does not correlate ...
... and predict survival in PH. Because of the dominating influence of small artery narrowing on increases in mPAP, a traditional strategy for PH treatment has been to reduce or attempt to reverse this aspect of pulmonary vascular remodeling. However, it is becoming apparent that mPAP does not correlate ...
Image-based large-eddy simulation in a realistic left heart
... Echocardiography techniques [10,11], with higher spatio-temporal resolution make an alternative to PC-MRI. However, echocardiography only gives access to velocity components directed towards or away from the ultrasonic beam, while one would want to measure the full 3D flow vectors. Nevertheless, inve ...
... Echocardiography techniques [10,11], with higher spatio-temporal resolution make an alternative to PC-MRI. However, echocardiography only gives access to velocity components directed towards or away from the ultrasonic beam, while one would want to measure the full 3D flow vectors. Nevertheless, inve ...
PDF
... AF among patients without structural heart disease. In dogs PVs have been shown to exert rapid firing of ectopic foci and triggered AF-mediated by triggered activity or abnormal automaticity,48 although this has not been a universl finding.49 Since both vagal AF and PV-related AF often occur in pati ...
... AF among patients without structural heart disease. In dogs PVs have been shown to exert rapid firing of ectopic foci and triggered AF-mediated by triggered activity or abnormal automaticity,48 although this has not been a universl finding.49 Since both vagal AF and PV-related AF often occur in pati ...
online supplement
... (RVD) and wall thickness (RVWT) at end-cardiac diastole were measured. The M-mode spectrum was also obtained in parasternal short axis view at the level of papillary muscles, and left ventricular (LV) dimensions at both end-cardiac diastole (LVDd) and systole (LVDs) were measured. The thickness of L ...
... (RVD) and wall thickness (RVWT) at end-cardiac diastole were measured. The M-mode spectrum was also obtained in parasternal short axis view at the level of papillary muscles, and left ventricular (LV) dimensions at both end-cardiac diastole (LVDd) and systole (LVDs) were measured. The thickness of L ...
Missing a Sub-pulmonary Ventricle: The Fontan Circulation
... capillary bed pools blood into another capillary bed through veins without passing through the heart, as for example in the hepatic portal system and the pituitary portal system. The Fontan neo-portal system dams off and pools the systemic venous blood. As a result, transit of blood through this neo ...
... capillary bed pools blood into another capillary bed through veins without passing through the heart, as for example in the hepatic portal system and the pituitary portal system. The Fontan neo-portal system dams off and pools the systemic venous blood. As a result, transit of blood through this neo ...
Fetal circulation - La Trobe
... • At birth the first breaths are the catalyst for the transition to neonatal circulation – Lungs inflate with oxygen with an increased atmospheric pressure – Lungs now become a low-pressure system as pulmonary vessels dilate with rise in oxygen level – Alveolar fluid is displaced ...
... • At birth the first breaths are the catalyst for the transition to neonatal circulation – Lungs inflate with oxygen with an increased atmospheric pressure – Lungs now become a low-pressure system as pulmonary vessels dilate with rise in oxygen level – Alveolar fluid is displaced ...
Catheter Ablation as a Treatment for Atrial Fibrillation
... Radiofrequency ablation (RFA) using a percutaneous catheter is a common approach to treat supraventricular arrhythmias. Atrial fibrillation (AF) frequently arises from an abnormal focus at or near the junction of the pulmonary veins and the left atrium, thus leading to the feasibility of more focuse ...
... Radiofrequency ablation (RFA) using a percutaneous catheter is a common approach to treat supraventricular arrhythmias. Atrial fibrillation (AF) frequently arises from an abnormal focus at or near the junction of the pulmonary veins and the left atrium, thus leading to the feasibility of more focuse ...
Open and Thoracoscopic Approaches to Treat Atrial Fibrillation and
... patients with AF who are undergoing mitral valve surgery. These trials establish that the addition of a modified maze procedure results in a lower incidence of atrial arrhythmias following surgery, with minimal additional risks. Observational studies support the RCT findings. The evidence is suffici ...
... patients with AF who are undergoing mitral valve surgery. These trials establish that the addition of a modified maze procedure results in a lower incidence of atrial arrhythmias following surgery, with minimal additional risks. Observational studies support the RCT findings. The evidence is suffici ...
Right Atrial Volume Index in Chronic Systolic Heart Failure and
... Inc., Malvern, Pennsylvania) machines. Twodimensional and color Doppler imaging were performed in standard parasternal and apical views. Left ventricular systolic and diastolic indexes were acquired as previously outlined in the ADEPT trial (9). All images were stored on magneto-optical disc and wer ...
... Inc., Malvern, Pennsylvania) machines. Twodimensional and color Doppler imaging were performed in standard parasternal and apical views. Left ventricular systolic and diastolic indexes were acquired as previously outlined in the ADEPT trial (9). All images were stored on magneto-optical disc and wer ...
PDF Article - ScienceDirect
... wall to the left ventricle along the lines of either the anterior or the posterior interventricular sulci. All three of these attachment sites serve to correlate right ventricular systolic contraction with that of the left ventricle, but the distin• guishing difference for right ventricular function ...
... wall to the left ventricle along the lines of either the anterior or the posterior interventricular sulci. All three of these attachment sites serve to correlate right ventricular systolic contraction with that of the left ventricle, but the distin• guishing difference for right ventricular function ...
insight review articles
... and irregular activation of the atrium, for example, 400–600 pulses of the atrium muscular wall per minute in humans. The occurrence of AF increases with age, with a prevalence rising from 0.5% of people in their 50s to nearly 10% of the octogenarian population1,2. Several cardiac disorders predispo ...
... and irregular activation of the atrium, for example, 400–600 pulses of the atrium muscular wall per minute in humans. The occurrence of AF increases with age, with a prevalence rising from 0.5% of people in their 50s to nearly 10% of the octogenarian population1,2. Several cardiac disorders predispo ...
Sleep disordered breathing and enlargement of the right heart after myocardial infarction
... SDB are exposed to repetitive hypoxia, increased heart rate and increased cardiac afterload [7]. In addition, coronary blood flow is uncoupled from cardiac workload in patients with SDB and related endothelial dysfunction [8]. Through these mechanisms, SDB contributes to reduced myocardial salvage, ...
... SDB are exposed to repetitive hypoxia, increased heart rate and increased cardiac afterload [7]. In addition, coronary blood flow is uncoupled from cardiac workload in patients with SDB and related endothelial dysfunction [8]. Through these mechanisms, SDB contributes to reduced myocardial salvage, ...
ANATOMICAL STUDY OF THE ANTERIOR INTERVENTRICULAR
... coronary artery ostium, the length of the branch from its origin up to penetration into the septomarginal trabecula, and the number of arterial branches inside the septomarginal trabecula. Topaz et al. [20,22] used coronary angiographies to analyze the anterior interventricular septal branch of grea ...
... coronary artery ostium, the length of the branch from its origin up to penetration into the septomarginal trabecula, and the number of arterial branches inside the septomarginal trabecula. Topaz et al. [20,22] used coronary angiographies to analyze the anterior interventricular septal branch of grea ...
Raising the bar on performance for Atrial Flutter
... BLAZER PRIME® XP TEMPERATURE ABLATION CATHETER INDICATIONS FOR USE The Boston Scientific Corporation Blazer Prime XP Catheter is indicated for use with the BSC high power Cardiac Ablation Controllers (the Maestro 3000® Controller, the EPT- 1000XP™ Controller, and the EPT-1000XPT™ Controller) and Ac ...
... BLAZER PRIME® XP TEMPERATURE ABLATION CATHETER INDICATIONS FOR USE The Boston Scientific Corporation Blazer Prime XP Catheter is indicated for use with the BSC high power Cardiac Ablation Controllers (the Maestro 3000® Controller, the EPT- 1000XP™ Controller, and the EPT-1000XPT™ Controller) and Ac ...
Pulmonary hypertension caused by pulmonary venous hypertension
... mitral ring.15-18 Rheumatic mitral valve disease is the most common of these abnormalities. iii) Narrowing of the extrapulmonary veins. This can be congenital, develop for occult reasons postnatally,19 or develop after surgery to correct anomalously connected veins.20 iv) Left ventricular (LV) nonco ...
... mitral ring.15-18 Rheumatic mitral valve disease is the most common of these abnormalities. iii) Narrowing of the extrapulmonary veins. This can be congenital, develop for occult reasons postnatally,19 or develop after surgery to correct anomalously connected veins.20 iv) Left ventricular (LV) nonco ...
Heart and Vascular System Practice Questions
... A. atrial systole and ventricular systole together. B. atrial systole and ventricular diastole together. C. atrial diastole and ventricular diastole together. D. atrial diastole and ventricular diastole together. 23. The tissue layer found in major blood vessels and the heart is the ____________. A. ...
... A. atrial systole and ventricular systole together. B. atrial systole and ventricular diastole together. C. atrial diastole and ventricular diastole together. D. atrial diastole and ventricular diastole together. 23. The tissue layer found in major blood vessels and the heart is the ____________. A. ...
Diagnosis and Treatment of Pulmonary Hypertension -
... disease and chronic obstructive pulmonary disease (COPD), which is the most common cause of pulmonary hypertension. During acute exacerbations of COPD, hypoxia and uncompensated hypercarbia can increase pulmonary blood pressure. Pulmonary hypertension may occur when blood flow through large pulmonar ...
... disease and chronic obstructive pulmonary disease (COPD), which is the most common cause of pulmonary hypertension. During acute exacerbations of COPD, hypoxia and uncompensated hypercarbia can increase pulmonary blood pressure. Pulmonary hypertension may occur when blood flow through large pulmonar ...
Atrial Flutter: Mechanisms, Clinical Features and Management
... exertional dyspnea and general discomfort. However this intolerance is often mild. Certain forms are even asymptomatic. Conversely the occurrence of atrial flutter in severe cardiac patients may be accompanied by congestive heart failure and pulmonary edema. Syncopal attacks are exceptional in relat ...
... exertional dyspnea and general discomfort. However this intolerance is often mild. Certain forms are even asymptomatic. Conversely the occurrence of atrial flutter in severe cardiac patients may be accompanied by congestive heart failure and pulmonary edema. Syncopal attacks are exceptional in relat ...
atrial fibrillation
... doesn’t stop the AF or bring the heart rhythm back to normal, but it usually does improve the symptoms. Medicine you may take every day There are three types of rate control medicine. They can be used alone or in combination: 1. beta blockers, such as atenolol (Tenormin), bisoprolol (Monocor), carv ...
... doesn’t stop the AF or bring the heart rhythm back to normal, but it usually does improve the symptoms. Medicine you may take every day There are three types of rate control medicine. They can be used alone or in combination: 1. beta blockers, such as atenolol (Tenormin), bisoprolol (Monocor), carv ...
Apical Right Ventricular Hypertrophic Cardiomyopathy—A Case
... based on whether they had isolated asymmetric apical hypertrophy (pure AHCM) or had co-existent hypertrophy of the interventricular septum (mixed AHCM) [5]. In contrast to left ventricular pathology in HCM, the involvement of the right ventricle is uncommon occurring in up to 15% of patients. Histol ...
... based on whether they had isolated asymmetric apical hypertrophy (pure AHCM) or had co-existent hypertrophy of the interventricular septum (mixed AHCM) [5]. In contrast to left ventricular pathology in HCM, the involvement of the right ventricle is uncommon occurring in up to 15% of patients. Histol ...
atrial fibrillation - Heart and Stroke Foundation
... It doesn’t stop the AF or bring the heart rhythm back to normal, but it usually does improve the symptoms. Medicine you may take every day There are three types of rate control medicine. They can be used alone or in combination: 1. beta blockers, such as atenolol (Tenormin), bisoprolol (Monocor), c ...
... It doesn’t stop the AF or bring the heart rhythm back to normal, but it usually does improve the symptoms. Medicine you may take every day There are three types of rate control medicine. They can be used alone or in combination: 1. beta blockers, such as atenolol (Tenormin), bisoprolol (Monocor), c ...
Targeted Neonatal Echocardiography in the Neonatal Intensive
... fetus, the pulmonary arteries and larger preacinar vessels demonstrate significant elastin in their medial layer, with a relative paucity of pulmonary smooth muscle, in contrast to the more distal preacinar and acinar vessels, which have a predominance of pulmonary smooth muscle in the media, and th ...
... fetus, the pulmonary arteries and larger preacinar vessels demonstrate significant elastin in their medial layer, with a relative paucity of pulmonary smooth muscle, in contrast to the more distal preacinar and acinar vessels, which have a predominance of pulmonary smooth muscle in the media, and th ...
Atrial Fibrillation: Diagnosis and Treatment
... The incidence of atrial fibrillation increases with age. Key treatment issues include deciding when to restore normal sinus rhythm, when to control rate only, and how to prevent thromboembolism. Rate control is the preferred management option in most patients. Rhythm control is an option for patient ...
... The incidence of atrial fibrillation increases with age. Key treatment issues include deciding when to restore normal sinus rhythm, when to control rate only, and how to prevent thromboembolism. Rate control is the preferred management option in most patients. Rhythm control is an option for patient ...
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.