Characterization of Atrial Repolarization Alternans and
... is a clear illustration of this fact. In the study that triggered it, elaborate experiments on an animal model yielded large amounts of data perturbed by unavoidable interferences, and the phenomenon of interest had an elusive nature. This thesis describes the physiological motivation for this study ...
... is a clear illustration of this fact. In the study that triggered it, elaborate experiments on an animal model yielded large amounts of data perturbed by unavoidable interferences, and the phenomenon of interest had an elusive nature. This thesis describes the physiological motivation for this study ...
Print - Circulation
... atrial fibrillation when shocks are synchronized to the R wave and delivered transthoracically. However, others have shown that during attempted transvenous cardioversion of rapid ventricular tachycardia, ventricular fibrillation (VF) may be induced. It was our objective to evaluate conditions (shor ...
... atrial fibrillation when shocks are synchronized to the R wave and delivered transthoracically. However, others have shown that during attempted transvenous cardioversion of rapid ventricular tachycardia, ventricular fibrillation (VF) may be induced. It was our objective to evaluate conditions (shor ...
The Enigma of the Fontan circulation Wolff, Djoeke
... means that a double pump and two circulations are present, and this is called a biventricular circulation1. Some congenital cardiac defects challenge this design. In the Netherlands, around 1200 children with congenital cardiac defects are born every year2. Over a hundred different congenital cardia ...
... means that a double pump and two circulations are present, and this is called a biventricular circulation1. Some congenital cardiac defects challenge this design. In the Netherlands, around 1200 children with congenital cardiac defects are born every year2. Over a hundred different congenital cardia ...
INCIDENCE, PREDICTORS AND OUTCOMES OF MYOCARDIAL
... alternative to surgical aortic valve replacement (SAVR) for patients with severe aortic stenosis at very high-risk or prohibitive perioperative risk. Compared to conventional openheart surgery, TAVR procedures are less invasive, because they are not associated with aortic cross-clamping and cardiopl ...
... alternative to surgical aortic valve replacement (SAVR) for patients with severe aortic stenosis at very high-risk or prohibitive perioperative risk. Compared to conventional openheart surgery, TAVR procedures are less invasive, because they are not associated with aortic cross-clamping and cardiopl ...
Valsalva Sinus Aneurysms: Findings at CT and MR Imaging
... Among the remaining 152 cases, the most common clinical sign was cardiac murmur, which was seen in 86 cases (57%), and the most common symptom was dyspnea, which was present in 85 cases (56%) (Table 2). Depending on the size of the aneurysm, the rapidity with which it ruptures, and the cardiac chamb ...
... Among the remaining 152 cases, the most common clinical sign was cardiac murmur, which was seen in 86 cases (57%), and the most common symptom was dyspnea, which was present in 85 cases (56%) (Table 2). Depending on the size of the aneurysm, the rapidity with which it ruptures, and the cardiac chamb ...
DISSERTATION INFLUENCE OF ANATOMIC VALVE CONDITIONS
... experimental findings. An in vitro setup is presented using a surgical bioprosthesis as a native aortic valve model, while additional valve implantations were also tested. Physiological pressures and flow rates were imposed across these valves via an in-house pumping loop, which included a novel cor ...
... experimental findings. An in vitro setup is presented using a surgical bioprosthesis as a native aortic valve model, while additional valve implantations were also tested. Physiological pressures and flow rates were imposed across these valves via an in-house pumping loop, which included a novel cor ...
Electrophysiological..
... cycle length (TCL), corrected PPI, ∆VA (ventriculoatrial), ∆HA (His-atrial), ∆AH (atrio-His) values, and responses to His-refractory ventricular premature depolarizations were studied. Compared with atrioventricular nodal reentrant tachycardia, ORT patients were younger (42±13 years versus 54±19 yea ...
... cycle length (TCL), corrected PPI, ∆VA (ventriculoatrial), ∆HA (His-atrial), ∆AH (atrio-His) values, and responses to His-refractory ventricular premature depolarizations were studied. Compared with atrioventricular nodal reentrant tachycardia, ORT patients were younger (42±13 years versus 54±19 yea ...
- Wiley Online Library
... Objectives: Central venous catheter (CVC) placement is a common procedure in critical care management. The authors set out to determine echocardiographic features during a saline flush of any type of CVC. The hypothesis was that the presence of a rapid saline swirl in the right atrium on bedside echo ...
... Objectives: Central venous catheter (CVC) placement is a common procedure in critical care management. The authors set out to determine echocardiographic features during a saline flush of any type of CVC. The hypothesis was that the presence of a rapid saline swirl in the right atrium on bedside echo ...
Slow and Long-Lasting Modulation of
... Prolonged ventricular pacing induces T wave polarity changes that persist long after cessation of pacing. To examine how ventricular repolarization is modulated by prolonged changes in activation sequence, we studied the effect of ectopic pacing on the distribution of action potential durations (APD ...
... Prolonged ventricular pacing induces T wave polarity changes that persist long after cessation of pacing. To examine how ventricular repolarization is modulated by prolonged changes in activation sequence, we studied the effect of ectopic pacing on the distribution of action potential durations (APD ...
atrial fibrillation
... older, diabetes mellitus, and history of stroke or transient ischemic attack (TIA). In the CHADS2 scoring system, cardiac failure, hypertension, age, age of 75 year or older, and diabetes are each assigned one point; a stroke or a TIA are assigned two points. The relative risk and the treatment deci ...
... older, diabetes mellitus, and history of stroke or transient ischemic attack (TIA). In the CHADS2 scoring system, cardiac failure, hypertension, age, age of 75 year or older, and diabetes are each assigned one point; a stroke or a TIA are assigned two points. The relative risk and the treatment deci ...
Subclinical Atrial Fibrillation and the Risk of Stroke
... atrial fibrillation by 3 months. The population attributable risk of ischemic stroke or systemic embolism associated with subclinical atrial tachyarrhythmia was 13%. There was no association between subclinical atrial tachyarrhythmias and any of the other clinical outcomes (Table 2). In the time-dep ...
... atrial fibrillation by 3 months. The population attributable risk of ischemic stroke or systemic embolism associated with subclinical atrial tachyarrhythmia was 13%. There was no association between subclinical atrial tachyarrhythmias and any of the other clinical outcomes (Table 2). In the time-dep ...
A Simple Guide to Thoracic Aortic Surgery
... Many connective tissue diseases that involve the aorta lead to the early development of aneurysms (see page 13). Patients with these diseases, in turn, are more likely to experience the complications associated with aneurysms (dissection and rupture) (see pages 16 and 19). As a result these patients ...
... Many connective tissue diseases that involve the aorta lead to the early development of aneurysms (see page 13). Patients with these diseases, in turn, are more likely to experience the complications associated with aneurysms (dissection and rupture) (see pages 16 and 19). As a result these patients ...
A Simple Guide to Thoracic Aortic Surgery
... Trunk" (1983) or the "Frozen Elephant Trunk" (2003) could be developed ...
... Trunk" (1983) or the "Frozen Elephant Trunk" (2003) could be developed ...
Supraventricular Tachycardia: Diagnosis and Management
... usually normal or supraventricular; however, it may be widened or abnormal because of intrinsic conduction disturbance, myocardial disease, or rate-related bundle branch block (BBB). INCIDENCE OF SVT The incidence of SVT in the general population remains unclear. Published incidence data from studie ...
... usually normal or supraventricular; however, it may be widened or abnormal because of intrinsic conduction disturbance, myocardial disease, or rate-related bundle branch block (BBB). INCIDENCE OF SVT The incidence of SVT in the general population remains unclear. Published incidence data from studie ...
Single-site ventricular and biventricular pacing
... LV-epi and RVA-BiV) caused by increased external work relative to normal myocardium. ...
... LV-epi and RVA-BiV) caused by increased external work relative to normal myocardium. ...
as a PDF
... LV-epi and RVA-BiV) caused by increased external work relative to normal myocardium. ...
... LV-epi and RVA-BiV) caused by increased external work relative to normal myocardium. ...
Print - Circulation
... terminalis. These wire electrodes are brought through the anterior chest wall for use in the diagnosis and treatment of postoperative arrhythmias in a manner previously described.7 All patients in this study also had another pair of wire electrodes placed on the Bachmann's bundle (the anterior inter ...
... terminalis. These wire electrodes are brought through the anterior chest wall for use in the diagnosis and treatment of postoperative arrhythmias in a manner previously described.7 All patients in this study also had another pair of wire electrodes placed on the Bachmann's bundle (the anterior inter ...
The ECGs that will be read around the world—and save lives of
... was to develop a comprehensive training resource to help physicians distinguish normal ECG alterations in athletes from abnormal ECG findings that require additional evaluation for conditions associated with SCD. INTRODUCTION Cardiovascular-related sudden death is the leading cause of mortality in at ...
... was to develop a comprehensive training resource to help physicians distinguish normal ECG alterations in athletes from abnormal ECG findings that require additional evaluation for conditions associated with SCD. INTRODUCTION Cardiovascular-related sudden death is the leading cause of mortality in at ...
Prevalence and characteristics of ectopic atrial tachycardia
... Supraventricular tachycardias (SVTs) are common rhythm disturbances and were previously clustered together into one diagnostic category. Based on the knowledge gained from invasive electrophysiological studies, it has become possible to differentiate between the various SVT subtypes, mainly by the m ...
... Supraventricular tachycardias (SVTs) are common rhythm disturbances and were previously clustered together into one diagnostic category. Based on the knowledge gained from invasive electrophysiological studies, it has become possible to differentiate between the various SVT subtypes, mainly by the m ...
Permanent Pacemaker
... o CRT is a three wire pacemaker system (atrial lead, RV lead and LV lead) that is used to manage patients with congestive heart failure, ventricular dyssynchrony whereby the loss of coordination between right and left ventricular contraction results in inefficient pumping of blood. o The goal of CRT ...
... o CRT is a three wire pacemaker system (atrial lead, RV lead and LV lead) that is used to manage patients with congestive heart failure, ventricular dyssynchrony whereby the loss of coordination between right and left ventricular contraction results in inefficient pumping of blood. o The goal of CRT ...
Acidosis slows electrical conduction through the atrio
... tissue. Thus acidosis can dramatically prolong the AVN delay, and in combination with short cycle lengths, this can cause partial or complete AVN block and is therefore implicated in the development of brady-arrhythmias in conditions of local or systemic acidosis. Keywords: atrio-ventricular node, o ...
... tissue. Thus acidosis can dramatically prolong the AVN delay, and in combination with short cycle lengths, this can cause partial or complete AVN block and is therefore implicated in the development of brady-arrhythmias in conditions of local or systemic acidosis. Keywords: atrio-ventricular node, o ...
AUTHOR QUERY FORM
... thickening the best. C and D, Computed tomography (CT). C, Chest CT without contrast enhancement. Axial slice demonstrates thickened pericardium, most prominent anteriorly (arrows). D, Intravenous contrast–enhanced CT of the chest. Axial image shows areas of focal thickening with calcification in th ...
... thickening the best. C and D, Computed tomography (CT). C, Chest CT without contrast enhancement. Axial slice demonstrates thickened pericardium, most prominent anteriorly (arrows). D, Intravenous contrast–enhanced CT of the chest. Axial image shows areas of focal thickening with calcification in th ...
Crawford Current Cardiology Edition 2
... which usually means that the underlying condition is mild because it requires the increased demand of exertion to precipitate symptoms. The next most common is paroxysmal nocturnal dyspnea, characterized by the patient awakening after being asleep or recumbent for an hour or more. This symptom is ca ...
... which usually means that the underlying condition is mild because it requires the increased demand of exertion to precipitate symptoms. The next most common is paroxysmal nocturnal dyspnea, characterized by the patient awakening after being asleep or recumbent for an hour or more. This symptom is ca ...
the ductus venosus in the human fetus
... changes in the ductus venosus blood flow velocity during states of hemodynamic compromise (Papers ill and IV), and by exploring the possibilities of estimating the pressure gradient across the ductus venosus as a means for describing an essential parameter in fetal hemodynamics (Paper V). Material a ...
... changes in the ductus venosus blood flow velocity during states of hemodynamic compromise (Papers ill and IV), and by exploring the possibilities of estimating the pressure gradient across the ductus venosus as a means for describing an essential parameter in fetal hemodynamics (Paper V). Material a ...
Physiological Remodelling of Mitral Valve Chordae Tendineae In
... Cardiac Remodelling – Pathological vs Physiological (Pregnancy) ....................... 25 ...
... Cardiac Remodelling – Pathological vs Physiological (Pregnancy) ....................... 25 ...
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 ↑