Chapter 14 Paroxysmal Supraventricular Tachycardias and the
... ranging from 16 to 65 years old and noted a low incidence of supraventricular arrhythmias.8,9 In contrast, recent longitudinal studies with telemetric monitoring and even implanted cardiac pacemakers document a very high incidence of asymptomatic and symptomatic atrial arrhythmias, particularly atri ...
... ranging from 16 to 65 years old and noted a low incidence of supraventricular arrhythmias.8,9 In contrast, recent longitudinal studies with telemetric monitoring and even implanted cardiac pacemakers document a very high incidence of asymptomatic and symptomatic atrial arrhythmias, particularly atri ...
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... Atrial fibrillation is the irregular and rapid beating of the upper 2 chambers of the heart (the atria), caused by the disruption of the electrical signals that control the heartbeat. In many cases of atrial fibrillation, extra electrical signals start in the area around the opening of the pulmonary ...
... Atrial fibrillation is the irregular and rapid beating of the upper 2 chambers of the heart (the atria), caused by the disruption of the electrical signals that control the heartbeat. In many cases of atrial fibrillation, extra electrical signals start in the area around the opening of the pulmonary ...
NCD Watch August 2016
... Box 1: Major risk factors for atrial fibrillation Advancing age — Anyone can have atrial fibrillation, but the risk is greater as people age. For each advancing decade of age, the risk of developing atrial fibrillation are about doubled. 13 For example, men aged 75 to 79 were 2 times and more than 5 ...
... Box 1: Major risk factors for atrial fibrillation Advancing age — Anyone can have atrial fibrillation, but the risk is greater as people age. For each advancing decade of age, the risk of developing atrial fibrillation are about doubled. 13 For example, men aged 75 to 79 were 2 times and more than 5 ...
Atrial Natriuretic Factor
... atrial [a´tre-al] pertaining to an atrium. atrial natriuretic factor (anf) a hormone produced in the cardiac atrium; it inhibits renin secretion and thus the ... ATRIAL NATRIURETIC FACTOR - DEFINITION OF ATRIAL ... Sun, 16 Apr 2017 14:09:00 GMT atrial natriuretic peptide. n. a peptide hormone that i ...
... atrial [a´tre-al] pertaining to an atrium. atrial natriuretic factor (anf) a hormone produced in the cardiac atrium; it inhibits renin secretion and thus the ... ATRIAL NATRIURETIC FACTOR - DEFINITION OF ATRIAL ... Sun, 16 Apr 2017 14:09:00 GMT atrial natriuretic peptide. n. a peptide hormone that i ...
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 ...
The Effect of Right Ventricular Filling on the Pressure
... After the chordae tendinae had been cut, a thinwalled balloon with an unstressed volume of 55 ml was placed in the lumen of each ventricle. The balloon contained a miniature pressure transducer (Konigsberg model P-21) and was attached to a metal connector device. The connector was secured with a pur ...
... After the chordae tendinae had been cut, a thinwalled balloon with an unstressed volume of 55 ml was placed in the lumen of each ventricle. The balloon contained a miniature pressure transducer (Konigsberg model P-21) and was attached to a metal connector device. The connector was secured with a pur ...
Developing a global fluid-structure interaction
... hemodynamic conditions associated with cardiovascular diseases. In recent clinical studies, it was established that regional pathologies of the aortic valve can alter the structural and hemodynamic function of the valve and coronary arteries. However, due to limitations either with medical imaging m ...
... hemodynamic conditions associated with cardiovascular diseases. In recent clinical studies, it was established that regional pathologies of the aortic valve can alter the structural and hemodynamic function of the valve and coronary arteries. However, due to limitations either with medical imaging m ...
Age-related sensitivity to nicotine for inducible atrial tachycardia and
... modulating vulnerability to atrial tachycardia and fibrillation (AT/AF) remains ill defined. The isolated hearts of six young (2–3 mo) and six old (22–24 mo) male Fischer 344 rats were Langendorff perfused at 5 ml/min with oxygenated Tyrode solution at 37°C, and the whole heart was also superfused w ...
... modulating vulnerability to atrial tachycardia and fibrillation (AT/AF) remains ill defined. The isolated hearts of six young (2–3 mo) and six old (22–24 mo) male Fischer 344 rats were Langendorff perfused at 5 ml/min with oxygenated Tyrode solution at 37°C, and the whole heart was also superfused w ...
Aortic Valve Replacement
... regression of myocardial hypertrophy, recovery of left ventricular performance, and remission of symptoms. However, the best valve substitute in terms of hemodynamic performance, durability, incidence of complications, and survival remains the subject of much debate. It has been suggested that valve ...
... regression of myocardial hypertrophy, recovery of left ventricular performance, and remission of symptoms. However, the best valve substitute in terms of hemodynamic performance, durability, incidence of complications, and survival remains the subject of much debate. It has been suggested that valve ...
Optimal pacing strategies for coming off CPB
... AV Interval: Each patient will have an optimal AV delay. Though the default value is usually sufficient in pt with normal systolic or diastolic function, in the hemodynamically compromised patients, adjustment of the AV delay to a real-time measure of cardiac output (such as Doppler time-velocity i ...
... AV Interval: Each patient will have an optimal AV delay. Though the default value is usually sufficient in pt with normal systolic or diastolic function, in the hemodynamically compromised patients, adjustment of the AV delay to a real-time measure of cardiac output (such as Doppler time-velocity i ...
S0735109707014052_mmc2
... (patient is intubated, recent post op, intra-procedural study, severe chest wall abnormalities and or COPD etc); or when b. Visualization of certain structures seen best by TEE is necessary to achieve the goals of the imaging test including but not limited to the mitral valve, atria, great vessels a ...
... (patient is intubated, recent post op, intra-procedural study, severe chest wall abnormalities and or COPD etc); or when b. Visualization of certain structures seen best by TEE is necessary to achieve the goals of the imaging test including but not limited to the mitral valve, atria, great vessels a ...
ECG Guide - Banner Health
... than 3mm in height. PRI (PR Interval): Is representative of the spread of the atrial depolarization wave, and the time it takes for the impulse to conduct through the AV node and to the ventricles. The PRI is marked from the start of the P-Wave to the beginning of the QRS. The PRI is normally no mor ...
... than 3mm in height. PRI (PR Interval): Is representative of the spread of the atrial depolarization wave, and the time it takes for the impulse to conduct through the AV node and to the ventricles. The PRI is marked from the start of the P-Wave to the beginning of the QRS. The PRI is normally no mor ...
ANATOMICAL STUDY OF THE ANTERIOR INTERVENTRICULAR
... The external diameter at the origin of the interventricular septal branch ranged from 1.0 mm to 2.35 mm (mean: 1.62 ± 0.37 mm). In 26 hearts (65%) the diameter was ≥ 1.5 mm, and in 14 hearts (35%) the diameter was < 1.5 mm. In seven hearts (17.5%), this diameter was ≥ 2 mm, while in 33 (82.5%), it w ...
... The external diameter at the origin of the interventricular septal branch ranged from 1.0 mm to 2.35 mm (mean: 1.62 ± 0.37 mm). In 26 hearts (65%) the diameter was ≥ 1.5 mm, and in 14 hearts (35%) the diameter was < 1.5 mm. In seven hearts (17.5%), this diameter was ≥ 2 mm, while in 33 (82.5%), it w ...
cardio i - jan 2015
... Variant of sinus dysrhythmia, which is a natural phenomenon in the very young or old. May also be caused by ischemic heart disease or atrial dilation. ...
... Variant of sinus dysrhythmia, which is a natural phenomenon in the very young or old. May also be caused by ischemic heart disease or atrial dilation. ...
Conduction Defects
... It remains uncertain whether local delay (or block) of the atrial activation can result in notching of the P-wave without an increase in its duration. On the other hand, some normal subjects, with no evidence of heart disease, do have a small notch at the peak of the P-wave, which is probably relate ...
... It remains uncertain whether local delay (or block) of the atrial activation can result in notching of the P-wave without an increase in its duration. On the other hand, some normal subjects, with no evidence of heart disease, do have a small notch at the peak of the P-wave, which is probably relate ...
Several of the cells have drop down menus with them – if you see an
... measurement as follows: From onset of QRS measure the time interval to the peak of the sustained S wave. The maximum time difference from QRS to peak between any 2 tissue Doppler measurements should be recorded in this field. Last NYHA class: NYHA Classification prior to BiV Last Ross Classification ...
... measurement as follows: From onset of QRS measure the time interval to the peak of the sustained S wave. The maximum time difference from QRS to peak between any 2 tissue Doppler measurements should be recorded in this field. Last NYHA class: NYHA Classification prior to BiV Last Ross Classification ...
6 Role ofthe Atrioventricular Node in Atrial Fibrillation
... thus be considered plausible that during sinus rhythrn, the AV node, like the SA node, behaves as an oscillator or pacemaker that is entrained by the atrial depolarization sparked by SA firing (58,59). Cohen et al. (59) developed a quantitative model along these lines to also describe the ventricula ...
... thus be considered plausible that during sinus rhythrn, the AV node, like the SA node, behaves as an oscillator or pacemaker that is entrained by the atrial depolarization sparked by SA firing (58,59). Cohen et al. (59) developed a quantitative model along these lines to also describe the ventricula ...
Analysis of the Heart Sounds and Murmurs of Fetuses - REAL-PhD
... on, after the first semester of my undergraduate studies I became really unsure about continuing my education in electrical and computer engineering and I was thinking of changing to medical studies. However, I remained at information technology, and a few weeks later I became aware of the fetal pho ...
... on, after the first semester of my undergraduate studies I became really unsure about continuing my education in electrical and computer engineering and I was thinking of changing to medical studies. However, I remained at information technology, and a few weeks later I became aware of the fetal pho ...
Fig. 11 - JACC: Cardiovascular Imaging
... TAVR ⴝ transcatheter aortic valve replacement TEE ⴝ transesophageal echocardiography ...
... TAVR ⴝ transcatheter aortic valve replacement TEE ⴝ transesophageal echocardiography ...
Syncope
... Patients with structural heart disease and unexplained syncope Class II: Less certain, but accepted Patients with recurrent unexplained syncope without structural heart disease and a negative tilt test Class III: Not indicated Patients with known cause of syncope in whom treatment will not be guided ...
... Patients with structural heart disease and unexplained syncope Class II: Less certain, but accepted Patients with recurrent unexplained syncope without structural heart disease and a negative tilt test Class III: Not indicated Patients with known cause of syncope in whom treatment will not be guided ...
stabilization of extracellular matrix components in
... pulmonary valve and into the pulmonary artery. This is the only artery with oxygen deficient blood, used to carry blood to the lungs for oxygenation. Blood returns to the heart via the pulmonary vein, empties into the left atrium, and a pressure gradient drives flow through the mitral valve into the ...
... pulmonary valve and into the pulmonary artery. This is the only artery with oxygen deficient blood, used to carry blood to the lungs for oxygenation. Blood returns to the heart via the pulmonary vein, empties into the left atrium, and a pressure gradient drives flow through the mitral valve into the ...
The Role of Visualization, Force Feedback, and Augmented Reality
... force application, and intracardiac navigation. Force feedback and augmented reality (AR) can be applied to minimally invasive mitral valve repair and transcatheter aortic valve implantation (TAVI) techniques to potentially surmount these challenges. Our study demonstrated shorter operative times wi ...
... force application, and intracardiac navigation. Force feedback and augmented reality (AR) can be applied to minimally invasive mitral valve repair and transcatheter aortic valve implantation (TAVI) techniques to potentially surmount these challenges. Our study demonstrated shorter operative times wi ...
All About Your Heart Failure Device
... failure may be helped by implanting an electronic device that will help your heart beat more efficiently. Not all people with heart failure benefit from such a device, but many do. Heart Failure A syndrome characterized by the heart’s inability to pump blood efficiently. Heart failure is a pumping d ...
... failure may be helped by implanting an electronic device that will help your heart beat more efficiently. Not all people with heart failure benefit from such a device, but many do. Heart Failure A syndrome characterized by the heart’s inability to pump blood efficiently. Heart failure is a pumping d ...
Electrocardiography (ECG) Handout Introduction
... We have developed a systematic approach of interpreting ECGs that can be used as a learning tool or as a checklist. Learning this type of approach will probably be useful for both for ECG clinical cases and for passing exams (such as the FACEM Fellowship). In both these situations (e.g. real life or ...
... We have developed a systematic approach of interpreting ECGs that can be used as a learning tool or as a checklist. Learning this type of approach will probably be useful for both for ECG clinical cases and for passing exams (such as the FACEM Fellowship). In both these situations (e.g. real life or ...
The Development of the Heart and Vascular System of Lepidosiren
... auriculo-ventricular opening. The posterior auricular wall remains very short and the sinu-auricular and auriculo-ventricular openings are consequently close together. The auriculoventricular plug, which is apparently a peculiarly dipnoan structure and which seems to be identically developed in Cera ...
... auriculo-ventricular opening. The posterior auricular wall remains very short and the sinu-auricular and auriculo-ventricular openings are consequently close together. The auriculoventricular plug, which is apparently a peculiarly dipnoan structure and which seems to be identically developed in Cera ...
Lutembacher's syndrome
Lutembacher's syndrome is a form of congenital heart disease. Lutembacher's syndrome was first described by a French cardiologist by the name of Rene' Lutembacher (1884–1968) of Paris, France in 1916. Lutembacher syndrome is a rare disease that affects one of the chambers of the heart as well as a valve of the heart. Lutembacher's syndrome is known to affect females more often than males. Lutembacher is an extremely rare disease. Lutembacher's can affect children or adults; the person can either be born with the disorder or develop it later in life.Lutembacher affects more specifically the atria of the heart and the mitral or biscupid valve. The disorder itself is known more specifically as both congenital atrial septal defect (ASD) and acquired mitral stenosis (MS). Congenital (at birth) atrial septal defect refers to a hole being in the septum or wall that separates the two atria; this condition is usually seen in fetuses and infants. Mitral stenosis refers to mitral valve leaflets (or valve flaps) sticking to each other making the opening for blood to pass from the atrium to the ventricles very small. With the valve being so small, blood has difficulty passing through the left atrium into the left ventricle. There are several types of septal defects that may occur with Lutembacher's syndrome: ASD Ostium Secundum or ASD (Primium); Ostium Secundum is the most prevalent.Lutembacher is caused indirectly as the result of heart damage or disorders and not something that is necessarily infectious. Lutembacher's syndrome is caused by either birth defects where the heart fails to close all holes in the walls between the atria or from an episode of rheumatic fever where damage is done to the heart valves such as the mitral valve and resultant in an opening of heart wall between atria. With Lutembacher's syndrome, a fetus or infant is usually seen to have a hole in their heart wall (interatrial) separating their right and left atria. Normally during fetal development, blood bypasses the lungs and is oxygenated from the placenta. Blood passes from the umbilical cord and flows into the left atrium through an opening called the foramen ovale; the formaen ovale is a hole between the two atria. Once a baby is born and the lungs begin to fill with air and the blood flow of the heart changes, a tissue flap (somewhat like a trap door) called the septum primium closes the foramen ovale or hole between the two atria and becomes part of the atrial wall. The failure of the hole between the two atria to close after birth leads to a disorder called ASD primium. The most common problems with an opening found in the heart with Lutembacher's syndrome is Ostium Secundum. Ostium Secundum is a hole that is found within the flap of tissue (septum primium) that will eventually close the hole between the two atria after birth. With either type of ASD, ASD will usually cause the blood flow from the right atrium to skip going to the right ventricle and instead flow to the left atrium. If mitral stenosis (the hardening of flap of tissue known as a valve which opens and closes between the left atrium and ventricle to control blood flow) is also present, blood will flow into the right atrium through the hole between the atria wall instead of flowing into the left ventricle and systemic circulation. Eventually this leads to other problems such as the right ventricle failing and a reduced blood flow to the left ventricle.In addition to the ASD, acquired MS can be present either from an episode of rheumatic fever (the mother has or had rheumatic fever during the pregnancy) or the child being born with the disorder (congenital MS). With the combination of both ASD and MS, the heart can be under severe strain as it tries to move blood throughout the heart and lungs. To correct Lutembacher's syndrome, surgery is often done. There are several types of surgeries depending on the cause of Lutembacher's syndrome(ASD Primium or ASD Ostium Secundum with Mitral Stenosis): Suturing (stitching) or placing a patch of tissue (similar to skin grafting) over the hole to completely close the opening Reconstructing of the mitral and tricuspid valve while patching any holes in the heart Device closure of ASD (e.g. Amplatzer umbrella or CardioSEAL to seal the hole Percutaneous transcatheter therapy Transcatheter therapy of balloon valvuloplasty to correct MS↑ ↑ 2.0 2.1 2.2 2.3 2.4 ↑ 3.0 3.1 3.2 3.3 3.4 ↑ ↑ ↑ 6.0 6.1 6.2 6.3 ↑