Aortic involvement in patients with a bicuspid aortic valve
... *Shone’s complex is a congenital anomaly which consists of a series of left heart obstructive lesions including supravalvular mitral ring, parachute mitral valve, subaortic stenosis, and coarctation of the aorta. A bicuspid aortic valve is noted in w70% of patients. ...
... *Shone’s complex is a congenital anomaly which consists of a series of left heart obstructive lesions including supravalvular mitral ring, parachute mitral valve, subaortic stenosis, and coarctation of the aorta. A bicuspid aortic valve is noted in w70% of patients. ...
Chapter 19
... • Can contract by itself, independent of any signals or stimulation from body • Contracts in response to an electrical current conveyed by a conduction system • Specialized cells in sinoatrial (SA) node, near superior vena cava initiate an electrical impulse ...
... • Can contract by itself, independent of any signals or stimulation from body • Contracts in response to an electrical current conveyed by a conduction system • Specialized cells in sinoatrial (SA) node, near superior vena cava initiate an electrical impulse ...
A 4-Tiered Classification of Left Ventricular Hypertrophy
... mass/vol0.67 (herein termed concentricity0.67) was more highly correlated with both LV wall thickness (sex-adjusted r2⫽0.89) and systolic blood pressure (r2⫽0.42) than was the standard definition of concentricity (LV mass/LVEDV) (r2⫽0.69 and 0.22, respectively), and thus concentricity0.67 was used f ...
... mass/vol0.67 (herein termed concentricity0.67) was more highly correlated with both LV wall thickness (sex-adjusted r2⫽0.89) and systolic blood pressure (r2⫽0.42) than was the standard definition of concentricity (LV mass/LVEDV) (r2⫽0.69 and 0.22, respectively), and thus concentricity0.67 was used f ...
PULMONARY CIRCULATION AT EXERCISE
... somewhat higher in Kovacs’ group, averaging 7.3 vs 6.4 Lmin-1. This may be explained by the smaller proportion of female subjects (22 % in the report by Kovacs et al. vs. 40 % in our own studies) and possible uncertainties about quality of cardiac output measurements using the Fick method (57). It i ...
... somewhat higher in Kovacs’ group, averaging 7.3 vs 6.4 Lmin-1. This may be explained by the smaller proportion of female subjects (22 % in the report by Kovacs et al. vs. 40 % in our own studies) and possible uncertainties about quality of cardiac output measurements using the Fick method (57). It i ...
Coexistence of Sick Sinus Rhythm and Atrial Flutter
... convert the atrial flutter by overdrive atrial stimulation. The procedure was explained to the patient, who gave signed consent. The electrophysiologic studies were performed after withholding digitalis and quinidine for 2 days. Serum digoxin level was 0.5 ng/ml on the day of the study. Two quadripo ...
... convert the atrial flutter by overdrive atrial stimulation. The procedure was explained to the patient, who gave signed consent. The electrophysiologic studies were performed after withholding digitalis and quinidine for 2 days. Serum digoxin level was 0.5 ng/ml on the day of the study. Two quadripo ...
Secundum atrial septal defect in the adult. Clinical
... in the medically managed group. At late follow-up cardiovascular mortality (5 vs.2 patients), cerebrovascular incidents (5 vs.1) and atrial fibrillation (7 vs.5) were more frequent in the medically than in the surgically managed group, in spite of the fact that 2/3 of the patients in the medical gro ...
... in the medically managed group. At late follow-up cardiovascular mortality (5 vs.2 patients), cerebrovascular incidents (5 vs.1) and atrial fibrillation (7 vs.5) were more frequent in the medically than in the surgically managed group, in spite of the fact that 2/3 of the patients in the medical gro ...
Secundum atrial septal defect in the adult. Clinical
... in the medically managed group. At late follow-up cardiovascular mortality (5 vs.2 patients), cerebrovascular incidents (5 vs.1) and atrial fibrillation (7 vs.5) were more frequent in the medically than in the surgically managed group, in spite of the fact that 2/3 of the patients in the medical gro ...
... in the medically managed group. At late follow-up cardiovascular mortality (5 vs.2 patients), cerebrovascular incidents (5 vs.1) and atrial fibrillation (7 vs.5) were more frequent in the medically than in the surgically managed group, in spite of the fact that 2/3 of the patients in the medical gro ...
How Harmful is Conventional Right Ventricular Apical Pacing
... is also associated with increased overall mortality and higher risk of sudden death [21]. Interventricular conduction disturbances are common in HF patients, mainly as QRS >150 ms (mean 27%), while worsening of HF is associated with QRS complex widening. Increased 1-year mortality with presence of c ...
... is also associated with increased overall mortality and higher risk of sudden death [21]. Interventricular conduction disturbances are common in HF patients, mainly as QRS >150 ms (mean 27%), while worsening of HF is associated with QRS complex widening. Increased 1-year mortality with presence of c ...
Retrograde Conduction to the Atria
... tachycardia with V-A conduction, Wenckebach phenomenon. The second, third, fifth, sixth, and seventh ectopic beats are followed by retrograde conduction. No V-A conduction after first ectopic beat because of interference with sinus beat. WVenckebaech phenomenon: V-A conduction times (sec.), second e ...
... tachycardia with V-A conduction, Wenckebach phenomenon. The second, third, fifth, sixth, and seventh ectopic beats are followed by retrograde conduction. No V-A conduction after first ectopic beat because of interference with sinus beat. WVenckebaech phenomenon: V-A conduction times (sec.), second e ...
the bronchial arteries in pulmonary emphysema
... avascular, and in three cases no adhesions were present in spite of the total obliteration of the visceral pleural arteries. (3) Anastomoses between Bronchial and Pulmonary Arteries in an Obliterated Peripheral Bronchial Arterial Circulation.-In four instances there was radiological evidence of prec ...
... avascular, and in three cases no adhesions were present in spite of the total obliteration of the visceral pleural arteries. (3) Anastomoses between Bronchial and Pulmonary Arteries in an Obliterated Peripheral Bronchial Arterial Circulation.-In four instances there was radiological evidence of prec ...
Depolarization wave and mechanics in the paced heart : model and
... Myofiber contraction is initiated by depolarization of the cell membrane. A coherent contraction of all myofibers in the cardiac walls is a requisite for an efficient pump function of the heart as a whole. In the heart, a specialized conduction system enables a fast spread of myocyte depolarization. ...
... Myofiber contraction is initiated by depolarization of the cell membrane. A coherent contraction of all myofibers in the cardiac walls is a requisite for an efficient pump function of the heart as a whole. In the heart, a specialized conduction system enables a fast spread of myocyte depolarization. ...
Right ventricular remodeling and function in pulmonary arterial hypertension
... PAH is a rare disease with an estimated prevalence of 15 cases per million in the general adult population. The incidence was estimated at 2.4 cases / million adult people / year. Most PAH patients are female (ratio female:male: 1.9:1) with a peak prevalence at the age of 50 years4. Most frequently, ...
... PAH is a rare disease with an estimated prevalence of 15 cases per million in the general adult population. The incidence was estimated at 2.4 cases / million adult people / year. Most PAH patients are female (ratio female:male: 1.9:1) with a peak prevalence at the age of 50 years4. Most frequently, ...
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 ...
Managing adult Fontan patients: where do we stand?
... atrial arrhythmia increases the pressure in the pulmonary venous atrium leading to a reduction in the pressure gradient down which the pulmonary blood flows. Reduction in pulmonary blood flow further depletes the preload in the single ventricle and leads to a fall in cardiac output. It is a frequent ...
... atrial arrhythmia increases the pressure in the pulmonary venous atrium leading to a reduction in the pressure gradient down which the pulmonary blood flows. Reduction in pulmonary blood flow further depletes the preload in the single ventricle and leads to a fall in cardiac output. It is a frequent ...
1 PULMONARY HYPERTENSION Robyn J. Barst, MD I
... without a patent foramen ovale) and patients with elevated pulmonary vascular resistance after complete surgical repair of congenital shunts may present with syncope. Angina, a common symptom that is often underappreciated, most often results from right ventricular ischemia (although left ventricula ...
... without a patent foramen ovale) and patients with elevated pulmonary vascular resistance after complete surgical repair of congenital shunts may present with syncope. Angina, a common symptom that is often underappreciated, most often results from right ventricular ischemia (although left ventricula ...
Hypertrophic Cardiomyopathy: A Systematic Review
... Magnetic resonance imaging may be of diagnostic value when echocardiographic studies are technically inadequate or in identifying segmental LVH undetectable by echocardiography. The 12-lead ECG pattern is abnormal in 75% to 95% of HCM patients and typically demonstrates a wide variety of patterns.25 ...
... Magnetic resonance imaging may be of diagnostic value when echocardiographic studies are technically inadequate or in identifying segmental LVH undetectable by echocardiography. The 12-lead ECG pattern is abnormal in 75% to 95% of HCM patients and typically demonstrates a wide variety of patterns.25 ...
Anatomy of the Atrioventricular Conduction System in
... defect, either as the only anomaly or as part of a recognized complex, and each had been obtained at necropsy during the years 1954 through 1959 and had been preserved in formalin for up to 3 years. Specimens were selected without regard to location of the defect, presence of other cardiac anomalies ...
... defect, either as the only anomaly or as part of a recognized complex, and each had been obtained at necropsy during the years 1954 through 1959 and had been preserved in formalin for up to 3 years. Specimens were selected without regard to location of the defect, presence of other cardiac anomalies ...
View Presentation - Society of Thoracic Radiology
... stationary chest wall,2 3) provide a defined space for the atria to be filled while the ventricles contract, acting as a backbone to prevent atrial collapse and allowing for blood to be “pulled into” the atria. The atria can act like individual bellows that fill with new blood as their respective ve ...
... stationary chest wall,2 3) provide a defined space for the atria to be filled while the ventricles contract, acting as a backbone to prevent atrial collapse and allowing for blood to be “pulled into” the atria. The atria can act like individual bellows that fill with new blood as their respective ve ...
Slow and Long-Lasting Modulation of
... and, for the most part, in the absence of known myocardial disease that would allow these T wave changes to be classified as primary. Rosenbaum et a15 noted that prolonged ventricular pacing modulates ventricular repolarization such that the T wave again becomes concordant to the R wave, as during n ...
... and, for the most part, in the absence of known myocardial disease that would allow these T wave changes to be classified as primary. Rosenbaum et a15 noted that prolonged ventricular pacing modulates ventricular repolarization such that the T wave again becomes concordant to the R wave, as during n ...
Chapter 96 - Extras Springer
... In addition to careful evaluation of the ECG, examination of the patient should include a search for physical signs of AV dissociation. Atrioventricular dissociation is present in approximately 50% of all VTs. The other 50% show some form of retrograde conduction to the atria.4 Therefore, the findin ...
... In addition to careful evaluation of the ECG, examination of the patient should include a search for physical signs of AV dissociation. Atrioventricular dissociation is present in approximately 50% of all VTs. The other 50% show some form of retrograde conduction to the atria.4 Therefore, the findin ...
Coexpression of Cardiac titins
... than do N2B titins (600–800 vs. 163 residues), as well as an additional tandem Ig segment (4). Recent sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) studies (2) of myocardium isolated from various species indicate that the expression level of N2B and N2BA cardiac titins varies ...
... than do N2B titins (600–800 vs. 163 residues), as well as an additional tandem Ig segment (4). Recent sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) studies (2) of myocardium isolated from various species indicate that the expression level of N2B and N2BA cardiac titins varies ...
Right Ventricular Systolic Function
... study for the right ventricle. An aortic constriction is released in diastole, leading on the subsequent systolic contraction to a decrease in left ventricular systolic pressure and also, through ventricular interdependence, to a decrease in right ventricular systolic ...
... study for the right ventricle. An aortic constriction is released in diastole, leading on the subsequent systolic contraction to a decrease in left ventricular systolic pressure and also, through ventricular interdependence, to a decrease in right ventricular systolic ...
Up-regulation of HO-1 Attenuates Left Ventricular Remodeling Post Myocardial by
... accompanied by a decrease in NFκB activity. No significant difference in infarct size and area of fibrosis between hemin and vehicle-treated groups was observed at 3 months. ...
... accompanied by a decrease in NFκB activity. No significant difference in infarct size and area of fibrosis between hemin and vehicle-treated groups was observed at 3 months. ...
ACC/AHA/ASE 2003 Guideline Update for the Clinical Application of
... update the guidelines published by the American Society of Anesthesiologists and the Society of Cardiovascular Anesthesiologists (SCA). There are extensive revisions especially of the sections on ischemic heart disease; congestive heart failure, cardiomyopathy, and assessment of left ventricular fun ...
... update the guidelines published by the American Society of Anesthesiologists and the Society of Cardiovascular Anesthesiologists (SCA). There are extensive revisions especially of the sections on ischemic heart disease; congestive heart failure, cardiomyopathy, and assessment of left ventricular fun ...
Editorial Review Abnormalities of the coronary circulation
... age, rising to 23.7% in males over the age of 5 9 years and to 33% in females of the same age [l].The electrocardiogram is a less sensitive index of left ventricular hypertrophy [2, 31, but it is an ominous prognostic sign, being associated with a sixfold increase in cardiac mortality and a threefol ...
... age, rising to 23.7% in males over the age of 5 9 years and to 33% in females of the same age [l].The electrocardiogram is a less sensitive index of left ventricular hypertrophy [2, 31, but it is an ominous prognostic sign, being associated with a sixfold increase in cardiac mortality and a threefol ...
Mitral insufficiency
Mitral insufficiency (MI), mitral regurgitation or mitral incompetence is a disorder of the heart in which the mitral valve does not close properly when the heart pumps out blood. It is the abnormal leaking of blood backwards from the left ventricle, through the mitral valve, into the left atrium, when the left ventricle contracts, i.e. there is regurgitation of blood back into the left atrium. MI is the most common form of valvular heart disease.