Management of Arrhythmias in Heart Failure
... patients with sick sinus syndrome develop alternating bradycardia and tachycardia, also known as tachy-brady syndrome [37]. The most common tachyarrhythmias are atrial fibrillation or flutter with rapid ventricular response. These tachyarrhythmias are more common in older patients with advanced sino ...
... patients with sick sinus syndrome develop alternating bradycardia and tachycardia, also known as tachy-brady syndrome [37]. The most common tachyarrhythmias are atrial fibrillation or flutter with rapid ventricular response. These tachyarrhythmias are more common in older patients with advanced sino ...
Top 10 Myths of Electrical Injury
... heart may cause long-term damage to conducting tissue: a hypothesis and review of the literature. Int J Cardiol. 53: 273-7, 1996 ...
... heart may cause long-term damage to conducting tissue: a hypothesis and review of the literature. Int J Cardiol. 53: 273-7, 1996 ...
Idiopathic atrial fibrillation: a rose by any other name?
... associated medical conditions rather than AF itself.5 Rather than tweaking the definition of idiopathic AF and describing the resultant population and their risk of morbidity, a potentially more interesting exercise is to try to determine why these patients actually have AF. Could there be a genetic ...
... associated medical conditions rather than AF itself.5 Rather than tweaking the definition of idiopathic AF and describing the resultant population and their risk of morbidity, a potentially more interesting exercise is to try to determine why these patients actually have AF. Could there be a genetic ...
Basic ECG Rhythm Interpretation
... divide into a complex network of fibers, called the Purkinje fibers, which is distributed to the ventricular myocardium. The fibers are more abundant in the subendocardial layers and are longer than the common myocardial fibers. The Purkinje fibers in the human heart are believed to lack nerve suppl ...
... divide into a complex network of fibers, called the Purkinje fibers, which is distributed to the ventricular myocardium. The fibers are more abundant in the subendocardial layers and are longer than the common myocardial fibers. The Purkinje fibers in the human heart are believed to lack nerve suppl ...
Auscultation of the Heart I - University of Edinburgh Open Journals
... an inverse ratio to the atrio-ventricular conduction time as reflected in the P-R interval of the electrocardiogram, that is, the shorter P-R interval the louder the sound. Intensity of the Second Heart Sound Increased intensity of the second sound at the base of the heart may be due to systemic or ...
... an inverse ratio to the atrio-ventricular conduction time as reflected in the P-R interval of the electrocardiogram, that is, the shorter P-R interval the louder the sound. Intensity of the Second Heart Sound Increased intensity of the second sound at the base of the heart may be due to systemic or ...
Nonuniformity: A physiologic modulator of contraction and relaxation
... coupling) both within a single cell and among cells taken from different parts of the heart (Fig. 2). Regional differences in action potential duration. Several reports have shown that action potential duration differs in different regions of the ventricle, being longer at the base than at the apex ...
... coupling) both within a single cell and among cells taken from different parts of the heart (Fig. 2). Regional differences in action potential duration. Several reports have shown that action potential duration differs in different regions of the ventricle, being longer at the base than at the apex ...
Document
... • Very slow rate and abnormal pacemaker site severely impair cardiac output • Patients will frequently be unconscious from poor perfusion • Cardiac failure can follow quickly Gail Walraven, Basic Arrhythmias, Seventh Edition ©2011 by Pearson Education, Inc., Upper Saddle River, NJ ...
... • Very slow rate and abnormal pacemaker site severely impair cardiac output • Patients will frequently be unconscious from poor perfusion • Cardiac failure can follow quickly Gail Walraven, Basic Arrhythmias, Seventh Edition ©2011 by Pearson Education, Inc., Upper Saddle River, NJ ...
Role of Atrial Fibrillation and Atrioventricular Conduction
... capacity to produce long RR intervals by means of concealed conduction. RR interval sequence- and QRS signal analysis enable one to test this hypothesis. Signal analysis of the bipolar atrial electrogram obtained during atrial fibrillation in patients with the Wolff-Parkinson-White syndrome and cond ...
... capacity to produce long RR intervals by means of concealed conduction. RR interval sequence- and QRS signal analysis enable one to test this hypothesis. Signal analysis of the bipolar atrial electrogram obtained during atrial fibrillation in patients with the Wolff-Parkinson-White syndrome and cond ...
Artificial heart pacemakers
... In a normal heart, the atria contract (squeeze) first, pushing blood into the ventricles. The ventricles then contract, pumping the blood out through the pulmonary artery to your lungs and out through to the aorta to the rest of your body. This process repeats with each heartbeat, usually around 60 ...
... In a normal heart, the atria contract (squeeze) first, pushing blood into the ventricles. The ventricles then contract, pumping the blood out through the pulmonary artery to your lungs and out through to the aorta to the rest of your body. This process repeats with each heartbeat, usually around 60 ...
Print this article
... hypoparathyroidism is a very atypical circumstance which is usually intractable to conventional therapy for cardiac failure, but responds satisfactorily to restoration of normocalcemia [4, 5]. Ionized calcium has an essential task for regulating myocardial contraction. During the cardiac action pote ...
... hypoparathyroidism is a very atypical circumstance which is usually intractable to conventional therapy for cardiac failure, but responds satisfactorily to restoration of normocalcemia [4, 5]. Ionized calcium has an essential task for regulating myocardial contraction. During the cardiac action pote ...
THE HEART
... Fibrillation is high but uncoordinated heart rate caused by regions of myocardium contracting and relaxing independently (lack of syncytum). Atrial fibrillation is not very serious if ventricles are functioning normally. Ventricular fibrillation is usually fatal (the most common cause of sudden deat ...
... Fibrillation is high but uncoordinated heart rate caused by regions of myocardium contracting and relaxing independently (lack of syncytum). Atrial fibrillation is not very serious if ventricles are functioning normally. Ventricular fibrillation is usually fatal (the most common cause of sudden deat ...
Full Text:PDF - The Turkish Journal of Pediatrics
... in infants because of difficulties in recognizing onset of paroxysm. Augmented atrial excitability and short refractory period due to prevailing cholinergic innervation determine the high rate of atrial tachycardia and inadequate myocardial inotropy - heart failure. Such a tachyarrhythmia is atrial ...
... in infants because of difficulties in recognizing onset of paroxysm. Augmented atrial excitability and short refractory period due to prevailing cholinergic innervation determine the high rate of atrial tachycardia and inadequate myocardial inotropy - heart failure. Such a tachyarrhythmia is atrial ...
Keeping Your Heart Healthy After Treatment for Childhood Cancer
... IIntroduction to Late Effects Guidelines and Health Links: The “Long-Term Follow-Up Guidelines for Survivors of Childhood, Adolescent, and Young Adult Cancers” and accompanying “Health Links” were developed by the Children’s Oncology Group as a collaborative effort of the Late Effects Committee and ...
... IIntroduction to Late Effects Guidelines and Health Links: The “Long-Term Follow-Up Guidelines for Survivors of Childhood, Adolescent, and Young Adult Cancers” and accompanying “Health Links” were developed by the Children’s Oncology Group as a collaborative effort of the Late Effects Committee and ...
National Coverage Determination (NCD) for Cardiac PACEMAKERs
... 6. Asymptomatic second degree atrioventricular block of Mobitz Type I unless the QRS complexes are prolonged or electrophysiological studies have demonstrated that the block is at or beyond the level of the His Bundle (a component of the electrical conduction system of the heart), 7. Syncope of unde ...
... 6. Asymptomatic second degree atrioventricular block of Mobitz Type I unless the QRS complexes are prolonged or electrophysiological studies have demonstrated that the block is at or beyond the level of the His Bundle (a component of the electrical conduction system of the heart), 7. Syncope of unde ...
Comparison of the Force-Velocity Relation
... of the values for maximum VCE and Po during the control state was ± 0.38 cm/sec and ± 34.8 g, respectively. 2. Effects of norepinephrine. In the seven experiments in which norepinephrine was infused, Po always increased; these increases ranged from 20.4* to 45.1%, and averaged 32.7?. In addition, ma ...
... of the values for maximum VCE and Po during the control state was ± 0.38 cm/sec and ± 34.8 g, respectively. 2. Effects of norepinephrine. In the seven experiments in which norepinephrine was infused, Po always increased; these increases ranged from 20.4* to 45.1%, and averaged 32.7?. In addition, ma ...
Heart Sound Segmentation of Pediatric Auscultations
... may be assumed since usually during an auscultation the patient is at rest, the sound segments are relatively short, and fluctuations due to the respiratory cycle may be disregarded in terms of heart cycle duration estimation. To infer the expected localization of each heart cycle, we estimate the h ...
... may be assumed since usually during an auscultation the patient is at rest, the sound segments are relatively short, and fluctuations due to the respiratory cycle may be disregarded in terms of heart cycle duration estimation. To infer the expected localization of each heart cycle, we estimate the h ...
Print - Circulation Research
... These were killed at corresponding times postoperatively and routine sections of heart and viscera obtained. Gross findings in animals used for enzyme studies were the same as those in animals studied histologically, and in all cases included cardiac hypertrophy, hydrothorax, and hepatomegaly. Prepa ...
... These were killed at corresponding times postoperatively and routine sections of heart and viscera obtained. Gross findings in animals used for enzyme studies were the same as those in animals studied histologically, and in all cases included cardiac hypertrophy, hydrothorax, and hepatomegaly. Prepa ...
Three-Dimensional Electrogram in Spherical Coordinates
... than studying the loops in their own frame of reference (Frank 1956). A current possibility would be to use threedimensional loops and to compute the SCG parameters. This procedure reduces the number of parameters required. Almost all present SCG evaluations are done by computer processing; therefor ...
... than studying the loops in their own frame of reference (Frank 1956). A current possibility would be to use threedimensional loops and to compute the SCG parameters. This procedure reduces the number of parameters required. Almost all present SCG evaluations are done by computer processing; therefor ...
Regional Venous Drainage of the Human Heart*
... ventricular myocardium. It is believed by many investigators that coronary sinus blood in man is composed almost entirely of left ventricular efflux. That this is true in the canine heart is firmly established (Rayford et al., 1959). This principle has been widely accepted in the many studies which ...
... ventricular myocardium. It is believed by many investigators that coronary sinus blood in man is composed almost entirely of left ventricular efflux. That this is true in the canine heart is firmly established (Rayford et al., 1959). This principle has been widely accepted in the many studies which ...
AccuRate® Heart Rate Monitor
... • The heart rate monitor is designed to work with people who have normal heart rhythms. Heart rate reading problems may be caused by medical conditions such as premature ventricular contractions (pvcs), tachycardia bursts, and arrhythmia. ...
... • The heart rate monitor is designed to work with people who have normal heart rhythms. Heart rate reading problems may be caused by medical conditions such as premature ventricular contractions (pvcs), tachycardia bursts, and arrhythmia. ...
Atrial Fibrillation, Inflammation and Statins
... blockers, may have a role in the prevention of AF onset and recurrence.33,34 The mechanism for this preventive effect in AF is probably complex. These drugs may achieve general haemodynamic changes, leading to lower intra-atrial pressure and wall-stress, or reduce atrial fibrosis, connexin43 over-ex ...
... blockers, may have a role in the prevention of AF onset and recurrence.33,34 The mechanism for this preventive effect in AF is probably complex. These drugs may achieve general haemodynamic changes, leading to lower intra-atrial pressure and wall-stress, or reduce atrial fibrosis, connexin43 over-ex ...
CMS Manual System Pub 100-08 Medicare Program Integrity
... Transmittal 530, dated July 18, 2014, is being rescinded and replaced by Transmittal 539, dated August 29, 2014 to clarify in section 4.2.8 that chronic heart failure is an added indication to NCD 20.10.1, cardiac rehabilitation only. All other information remains the same. SUBJECT: Cardiac Rehabili ...
... Transmittal 530, dated July 18, 2014, is being rescinded and replaced by Transmittal 539, dated August 29, 2014 to clarify in section 4.2.8 that chronic heart failure is an added indication to NCD 20.10.1, cardiac rehabilitation only. All other information remains the same. SUBJECT: Cardiac Rehabili ...
Arrhythmia
... A cardiac arrhythmia is defined as an irregular heart rhythm caused by abnormal electrical activity. The abnormal electrical activity can cause the heart to beat too rapidly, too slowly, or erratically, and may interfere with the heart’s ability to efficiently pump blood throughout the body. Many ...
... A cardiac arrhythmia is defined as an irregular heart rhythm caused by abnormal electrical activity. The abnormal electrical activity can cause the heart to beat too rapidly, too slowly, or erratically, and may interfere with the heart’s ability to efficiently pump blood throughout the body. Many ...
Should you evaluate for CAD in seniors with premature ventricular
... often with young women who don’t have known heart disease—rather than the elderly. I often discover PVCs on physical examination in the office or see them on a Holter monitor ordered to rule out other more worrisome arrhythmias. This reminds me that I need to not only consider the issue of treatment ...
... often with young women who don’t have known heart disease—rather than the elderly. I often discover PVCs on physical examination in the office or see them on a Holter monitor ordered to rule out other more worrisome arrhythmias. This reminds me that I need to not only consider the issue of treatment ...