Systolic Longitudinal Function of the Left Ventricle Assessed by
... Methods: In this study, 126 patients with HFNEF and diastolic dysfunction and 60 normal subjects on conventional echocardiography underwent STE evaluations, including LV end-diastolic and end-systolic dimensions; interventricular septal thickness; posterior wall thickness; LV volume; LV ejection fra ...
... Methods: In this study, 126 patients with HFNEF and diastolic dysfunction and 60 normal subjects on conventional echocardiography underwent STE evaluations, including LV end-diastolic and end-systolic dimensions; interventricular septal thickness; posterior wall thickness; LV volume; LV ejection fra ...
the PDF - Heart Rhythm Society
... This table represents the relationships of writing group members that may be perceived as actual or reasonably perceived conflicts of interest as reported on the Disclosure Questionnaire, which all members of the writing group are required to complete and submit. A relationship is considered to be “ ...
... This table represents the relationships of writing group members that may be perceived as actual or reasonably perceived conflicts of interest as reported on the Disclosure Questionnaire, which all members of the writing group are required to complete and submit. A relationship is considered to be “ ...
The Heart - Pearson Higher Education
... As we have noted, the superficial epicardium is the visceral layer of the serous pericardium. It is often infiltrated with fat, especially in older people. The middle layer, the myocardium (“muscle heart”), is composed mainly of cardiac muscle and forms the bulk of the heart. This is the layer that ...
... As we have noted, the superficial epicardium is the visceral layer of the serous pericardium. It is often infiltrated with fat, especially in older people. The middle layer, the myocardium (“muscle heart”), is composed mainly of cardiac muscle and forms the bulk of the heart. This is the layer that ...
Print - Circulation
... occurs under these conditions of cardioplegia, a finding consistent with separate studies on myocardial preservation and cardioplegia.20 Samples of both ventricles of normal donor hearts that for technical reasons were not used for transplantation as intended were also studied. 2. The left ventricul ...
... occurs under these conditions of cardioplegia, a finding consistent with separate studies on myocardial preservation and cardioplegia.20 Samples of both ventricles of normal donor hearts that for technical reasons were not used for transplantation as intended were also studied. 2. The left ventricul ...
Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub. 2014
... sympathetic afferent fibers. The superior ANS control centers are predominantly located in the reticular formation, nuclei of the medulla oblongata and the lower third of the brainstem in a region called the vasomotor center (VMC). The latter is functionally divided into a vagal part with cardioinhi ...
... sympathetic afferent fibers. The superior ANS control centers are predominantly located in the reticular formation, nuclei of the medulla oblongata and the lower third of the brainstem in a region called the vasomotor center (VMC). The latter is functionally divided into a vagal part with cardioinhi ...
Patterns of muscular strain in the embryonic heart wall
... contracted state (b), with the subendocardial layer in red and the muscle cross-sectional area (green) held constant. c,d: Two plausible expanded states are shown: solid wall (c) or with trabecular spaces (d) (*). Fig. 2. Finite element modeling of stage 21 chick heart with a four-layer mesh shows g ...
... contracted state (b), with the subendocardial layer in red and the muscle cross-sectional area (green) held constant. c,d: Two plausible expanded states are shown: solid wall (c) or with trabecular spaces (d) (*). Fig. 2. Finite element modeling of stage 21 chick heart with a four-layer mesh shows g ...
Alternate Patterns of Premature Ventricular Excitation
... premature ventricular excitation have been observed during induced atrial bigeminy in 18 subjects, including five normal volunteers. Each study was performed in the cardiac catheterization suite where a transvenous catheter electrode was positioned in the right atrium. Coupled or paired stimuli were ...
... premature ventricular excitation have been observed during induced atrial bigeminy in 18 subjects, including five normal volunteers. Each study was performed in the cardiac catheterization suite where a transvenous catheter electrode was positioned in the right atrium. Coupled or paired stimuli were ...
Having an internal cardiac defibrillator (ICD) implanted
... Unlike ventricular tachycardia, during ventricular fibrillation the heart beats extremely fast and irregularly. You will feel very dizzy and may pass out. Pacing cannot be used to stop an irregular rhythm. Therefore, the ICD will charge up to deliver an electric shock. The electric shocks do not dam ...
... Unlike ventricular tachycardia, during ventricular fibrillation the heart beats extremely fast and irregularly. You will feel very dizzy and may pass out. Pacing cannot be used to stop an irregular rhythm. Therefore, the ICD will charge up to deliver an electric shock. The electric shocks do not dam ...
Misdiagnosis of Dextrocardia and Situs Inversus in a two Year Old
... is low as compared to isolated congenital dextrocardia7. The usual abnormality of Situsinversus with Dextrocardia is atrial situssolitus (93%), discordant AV connection (44%) and disconcordant ventriculoatrial (VA) connection (30%)8. The orientation of organs, due to Situsinversus is mirror image of ...
... is low as compared to isolated congenital dextrocardia7. The usual abnormality of Situsinversus with Dextrocardia is atrial situssolitus (93%), discordant AV connection (44%) and disconcordant ventriculoatrial (VA) connection (30%)8. The orientation of organs, due to Situsinversus is mirror image of ...
Digoxin in heart failure and cardiac arrhythmias
... failure. Questions have been raised about the incremental benefit of adding digoxin to these newer agents, and there are concerns about the hazards of using digoxin in patients with heart failure. Two studies in the 1980s reported that digoxin use was associated with increased mortality in survivors ...
... failure. Questions have been raised about the incremental benefit of adding digoxin to these newer agents, and there are concerns about the hazards of using digoxin in patients with heart failure. Two studies in the 1980s reported that digoxin use was associated with increased mortality in survivors ...
Temperature as a modifier of fish cardiac contractility
... The fish heart is a four-chambered organ, which powers the circulation of blood according to the metabolic needs of the active tissues. Because different fish species inhabit a variety of environments and, depending on their strategy of temperature adaptation that determine life styles and activity ...
... The fish heart is a four-chambered organ, which powers the circulation of blood according to the metabolic needs of the active tissues. Because different fish species inhabit a variety of environments and, depending on their strategy of temperature adaptation that determine life styles and activity ...
with abnormalities of atrioventricular conduction Genetic study of
... the son of one of the propositi and had paroxysmal coronary sinus rhythm with an intact atrial septum. Defects of the atrial septum, like other forms of isolated congenital heart disease, are usually examples of multifactorialaetiology (Nora, McNamara, and Fraser, I967). The relative importance of g ...
... the son of one of the propositi and had paroxysmal coronary sinus rhythm with an intact atrial septum. Defects of the atrial septum, like other forms of isolated congenital heart disease, are usually examples of multifactorialaetiology (Nora, McNamara, and Fraser, I967). The relative importance of g ...
Cardiac Rhythm Management Devices (Part I)
... Chronic Bifascicular and Trifascicular Block. Major fascicles of the conduction system below the His bundle are the right bundle branch and the left anterior and posterior fascicles of the left bundle branch. The latter activate the left ventricular free wall.36 In addition, septal branches of the l ...
... Chronic Bifascicular and Trifascicular Block. Major fascicles of the conduction system below the His bundle are the right bundle branch and the left anterior and posterior fascicles of the left bundle branch. The latter activate the left ventricular free wall.36 In addition, septal branches of the l ...
Cardioverter defibrillator therapy in the primary and secondary
... and cardioversion/defibrillation; they are capable of ventricular bradycardia support, antitachycardia pacing, cardioversion and defibrillation. Dual-chamber ICDs have an additional RA lead, thus enabling AV sequential (physiological) pacing and holding the potential to improve the differentiation b ...
... and cardioversion/defibrillation; they are capable of ventricular bradycardia support, antitachycardia pacing, cardioversion and defibrillation. Dual-chamber ICDs have an additional RA lead, thus enabling AV sequential (physiological) pacing and holding the potential to improve the differentiation b ...
Coexistence of Sick Sinus Rhythm and Atrial Flutter
... although a maj'or part of the right and left atria were in flutter and/ or fibrillation. The presence of an underlying sick sinus syndrome'31 is supported by (1) the presence of sinus bradycardia; (2) dampened response to atropine; (3) prolonged corrected sinus node recovery time, and (4) secondary ...
... although a maj'or part of the right and left atria were in flutter and/ or fibrillation. The presence of an underlying sick sinus syndrome'31 is supported by (1) the presence of sinus bradycardia; (2) dampened response to atropine; (3) prolonged corrected sinus node recovery time, and (4) secondary ...
Heart Rate Variability as an Index of Regulated
... on the firing rate of the sinoatrial node and, among other things, results in increased heart rate. In contrast, parasympathetic activation has an inhibitory influence on the pacemaking activity of the sinoatrial node and produces decreased heart rate. Alternatively, it can be said that the two auto ...
... on the firing rate of the sinoatrial node and, among other things, results in increased heart rate. In contrast, parasympathetic activation has an inhibitory influence on the pacemaking activity of the sinoatrial node and produces decreased heart rate. Alternatively, it can be said that the two auto ...
Simulation Study of the Electrophysiological Mechanisms for Heart
... Heart failure (HF) is a clinical syndrome caused by the inability of the heart to supply blood to the tissues, and has a high variability in its etiology. The most frequent causes for HF failure are myocardial infarction, pressure overload, volume overload, viral myocarditis, toxic cardiomyopathy an ...
... Heart failure (HF) is a clinical syndrome caused by the inability of the heart to supply blood to the tissues, and has a high variability in its etiology. The most frequent causes for HF failure are myocardial infarction, pressure overload, volume overload, viral myocarditis, toxic cardiomyopathy an ...
heart and blood vessel basics
... When your heart beats at a normal rate and rhythm it's called normal sinus rhythm. A problem in your heart's electrical system can disrupt your heart's normal rhythm. An abnormal heart rate (or heart rhythm) is called an arrhythmia. It's normal and healthy for your heartbeat to speed up or slow down ...
... When your heart beats at a normal rate and rhythm it's called normal sinus rhythm. A problem in your heart's electrical system can disrupt your heart's normal rhythm. An abnormal heart rate (or heart rhythm) is called an arrhythmia. It's normal and healthy for your heartbeat to speed up or slow down ...
The Efficacy of Administration of Intravenous Magnesium Sulfate for
... Any sinus rhythm at a rate higher than one hundred beats per minute is considered supraventricular tachycardia, and atrial tachyarrhythmia is a specific type of supraventricular tachycardia. 1 Atrial tachyarrhythmias originate in the atria and sustain a rate greater than one hundred. Abnormal impuls ...
... Any sinus rhythm at a rate higher than one hundred beats per minute is considered supraventricular tachycardia, and atrial tachyarrhythmia is a specific type of supraventricular tachycardia. 1 Atrial tachyarrhythmias originate in the atria and sustain a rate greater than one hundred. Abnormal impuls ...
22. Heart
... and two larger ventricles (figure 22.5). The left and right atria (ā ́trē-ă; sing., atrium; entrance hall) are thin-walled chambers located superiorly. The anterior part of each atrium is a wrinkled, flaplike extension, called an auricle (au ́ri-kl; auris = ear) because it resembles an ear. The ...
... and two larger ventricles (figure 22.5). The left and right atria (ā ́trē-ă; sing., atrium; entrance hall) are thin-walled chambers located superiorly. The anterior part of each atrium is a wrinkled, flaplike extension, called an auricle (au ́ri-kl; auris = ear) because it resembles an ear. The ...
Fishing for the genetic basis of cardiovascular disease
... as mice. Mice have a heart rate of 300-600 beats per minute (bpm), whereas human hearts have a rate of 60-100 bpm. As a consequence, much of the heart cycle, especially repolarization – meaning the reestablishment of resting conditions, is accomplished by a completely different set of ion channels i ...
... as mice. Mice have a heart rate of 300-600 beats per minute (bpm), whereas human hearts have a rate of 60-100 bpm. As a consequence, much of the heart cycle, especially repolarization – meaning the reestablishment of resting conditions, is accomplished by a completely different set of ion channels i ...
Document
... pathway or road that electrical impulses must travel. Under normal conditions, this impulse causes the ventricles to contract and forces blood out of the heart to circulate through the body. ...
... pathway or road that electrical impulses must travel. Under normal conditions, this impulse causes the ventricles to contract and forces blood out of the heart to circulate through the body. ...
Prevalence of impaired left ventricular systolic function - Heart
... people between 50 and 89 years of age (3.5% of the background population in the age group) and 764 people participated, giving an overall response rate of 70.2%. The study was conducted from September 1997 to February 2000. The study was performed according to Helsinki II declarations and approved b ...
... people between 50 and 89 years of age (3.5% of the background population in the age group) and 764 people participated, giving an overall response rate of 70.2%. The study was conducted from September 1997 to February 2000. The study was performed according to Helsinki II declarations and approved b ...
Rosenberg (BIDMC) PACE Article 2012
... AF. In many cases, clinical decisions such as antiarrhythmic medication dosage adjustment, the need for cardioversion, and potentially the need for anticoagulation, are based on the ability of clinicians to detect and document the presence of recurrence and burden of AF. In addition, outpatient moni ...
... AF. In many cases, clinical decisions such as antiarrhythmic medication dosage adjustment, the need for cardioversion, and potentially the need for anticoagulation, are based on the ability of clinicians to detect and document the presence of recurrence and burden of AF. In addition, outpatient moni ...