The importance of exercise echocardiography for clinical decision
... stress and the immediate postexercise period,22 specifically regarding the SPAP. After the patient is positioned on the ergometer, a workload of 50 W is set. During the test, the workload is increased with 25 W every 3 min in young, otherwise healthy patients, but can be adjusted in older individual ...
... stress and the immediate postexercise period,22 specifically regarding the SPAP. After the patient is positioned on the ergometer, a workload of 50 W is set. During the test, the workload is increased with 25 W every 3 min in young, otherwise healthy patients, but can be adjusted in older individual ...
Rhythm management devices
... (1820). It had 3 pertinent features: a bellows to give forced ventilation, a metallic tube to be inserted into the esophagus and a voltaic pile attached at one pole to the esophageal tube and at the other to an electrode. The electrode was to be successively touched to “the regions of the heart, the ...
... (1820). It had 3 pertinent features: a bellows to give forced ventilation, a metallic tube to be inserted into the esophagus and a voltaic pile attached at one pole to the esophageal tube and at the other to an electrode. The electrode was to be successively touched to “the regions of the heart, the ...
- Carolina Digital Repository
... increases, exceeds aortic pressure and the aortic valve opens, ejection occurs, LV volume drops and the aortic valve closes (Otto, 2004). LV systolic function is best described by contraction and is affected by heart rate, preload and afterload (Otto, 2004). Optimal performance of the LV is depende ...
... increases, exceeds aortic pressure and the aortic valve opens, ejection occurs, LV volume drops and the aortic valve closes (Otto, 2004). LV systolic function is best described by contraction and is affected by heart rate, preload and afterload (Otto, 2004). Optimal performance of the LV is depende ...
NEMOURS CARDIAC CENTER
... When baby Lucy went for her two-week checkup, her pediatrician detected a heart murmur and told her parents to get her to Nemours Cardiac Center immediately. Within days she underwent a Norwood procedure, first of three surgeries for hypoplastic left heart syndrome, a condition in which the structur ...
... When baby Lucy went for her two-week checkup, her pediatrician detected a heart murmur and told her parents to get her to Nemours Cardiac Center immediately. Within days she underwent a Norwood procedure, first of three surgeries for hypoplastic left heart syndrome, a condition in which the structur ...
Cardiorespiratory interactions and blood flow generation during
... porcine model of prolonged cardiac arrest (10 minutes). Infusion of 2 mL/kg in 10 minutes or 4 mL/kg in 20 minutes enhanced myocardial blood flow and cardiac index and significantly increased resuscitation success and survival rates [30•]. Hypertonic saline has been shown to be deleterious in hearts ...
... porcine model of prolonged cardiac arrest (10 minutes). Infusion of 2 mL/kg in 10 minutes or 4 mL/kg in 20 minutes enhanced myocardial blood flow and cardiac index and significantly increased resuscitation success and survival rates [30•]. Hypertonic saline has been shown to be deleterious in hearts ...
Assessment of wasted myocardial work: a novel method - AJP
... doi:10.1152/ajpheart.00191.2013.—Left ventricular (LV) dyssynchrony reduces myocardial efficiency because work performed by one segment is wasted by stretching other segments. In the present study, we introduce a novel noninvasive clinical method that quantifies wasted energy as the ratio between wo ...
... doi:10.1152/ajpheart.00191.2013.—Left ventricular (LV) dyssynchrony reduces myocardial efficiency because work performed by one segment is wasted by stretching other segments. In the present study, we introduce a novel noninvasive clinical method that quantifies wasted energy as the ratio between wo ...
Hand-carried Echocardiography - Hellenic Journal of Cardiology
... examination remains the cornerstone for the initial assessment of patients with suspected cardiovascular disease. However, proper physical examination (particularly heart auscultation) requires skills, which appear to decline in most physicians, despite the application of modern educational methods5 ...
... examination remains the cornerstone for the initial assessment of patients with suspected cardiovascular disease. However, proper physical examination (particularly heart auscultation) requires skills, which appear to decline in most physicians, despite the application of modern educational methods5 ...
Murmurs in children - Pediatric Associates of Newnan
... Murmurs in Children Heart murmurs are one of the most common physical findings in any practice that cares for children 50-60% of children have a heart murmur Over 90% of heart murmurs are normal and require no further evaluation/referral termed “innocent,” “functional,” “benign,” or ...
... Murmurs in Children Heart murmurs are one of the most common physical findings in any practice that cares for children 50-60% of children have a heart murmur Over 90% of heart murmurs are normal and require no further evaluation/referral termed “innocent,” “functional,” “benign,” or ...
Electroanatomic Mapping System - European Journal of Medical
... three different parts: non-fluoroscopic catheter localization, calculation of electrical activation sequences and voltage maps [3-5], 3D display of the anatomy from serially generated catheter localization information [6]. These systems are used during cardiac ablations, aimed at destroying heart ti ...
... three different parts: non-fluoroscopic catheter localization, calculation of electrical activation sequences and voltage maps [3-5], 3D display of the anatomy from serially generated catheter localization information [6]. These systems are used during cardiac ablations, aimed at destroying heart ti ...
Acute Inferior Myocardial Infarction with Right Ventricular
... Volume resuscitation with saline solution is the therapeutic aim of maintaining pre-load based on prior studies. This has been adopted for several years now as an initial therapeutic measure (6,7,8). However, recent studies have shown adverse effects related to excess of volume resuscitation. Severa ...
... Volume resuscitation with saline solution is the therapeutic aim of maintaining pre-load based on prior studies. This has been adopted for several years now as an initial therapeutic measure (6,7,8). However, recent studies have shown adverse effects related to excess of volume resuscitation. Severa ...
2015 Secondary Mitral Regurgitation in Heart Failure
... diagram of MR due to idiopathic dilated cardiomyopathy, with a central jet. Note the lateral displacement of the papillary muscles (arrows). Apical displacement is also typically present, although less well demonstrated in these views. LVOT ¼ left ventricular outflow tract; MR ¼ mitral regurgitation; ...
... diagram of MR due to idiopathic dilated cardiomyopathy, with a central jet. Note the lateral displacement of the papillary muscles (arrows). Apical displacement is also typically present, although less well demonstrated in these views. LVOT ¼ left ventricular outflow tract; MR ¼ mitral regurgitation; ...
Pre-participation screening in the young competitive athlete
... vascular disease in adolescents. The screening began in grade 7 with a 3-year follow-up. Both a question naire and ECG were used to screen athletes and nonathletes. A study of the program was conducted between 1989 and 1997 and the authors found the screening to be cost-effective ($8800/year of lif ...
... vascular disease in adolescents. The screening began in grade 7 with a 3-year follow-up. Both a question naire and ECG were used to screen athletes and nonathletes. A study of the program was conducted between 1989 and 1997 and the authors found the screening to be cost-effective ($8800/year of lif ...
Diastolic Heart Failure After Cardiac Surgery
... pressure ventilation (to which virtually all of open heart surgery patients are subjected to postoperatively) on cardiac performance is complex involving changes in preload and afterload for both right and left ventricles. Positive pressure ventilation can lower ventricular filling, and may also red ...
... pressure ventilation (to which virtually all of open heart surgery patients are subjected to postoperatively) on cardiac performance is complex involving changes in preload and afterload for both right and left ventricles. Positive pressure ventilation can lower ventricular filling, and may also red ...
Interrelationships of Hepatic Blood Flow
... liver. To our knowledge, the present study is the first to demonstrate that the liver is a major site of metabolism or removal of lidocaine in man. The techniques employed in our study do not differentiate between lidocaine metabolism and excretion by the liver, but do demonstrate removal of lidocai ...
... liver. To our knowledge, the present study is the first to demonstrate that the liver is a major site of metabolism or removal of lidocaine in man. The techniques employed in our study do not differentiate between lidocaine metabolism and excretion by the liver, but do demonstrate removal of lidocai ...
Cardiac Motion Analysis to Improve Pacing Site Selection in CRT1
... with the maximum electromechanical delay. Improvements in the techniques for determining and guiding the optimal placement of pacing leads are needed. Many ultrasound techniques (12–14) (eg, M-mode echocardiography, tissue Doppler techniques) are employed for measuring cardiac dyssynchrony to facili ...
... with the maximum electromechanical delay. Improvements in the techniques for determining and guiding the optimal placement of pacing leads are needed. Many ultrasound techniques (12–14) (eg, M-mode echocardiography, tissue Doppler techniques) are employed for measuring cardiac dyssynchrony to facili ...
ASSOCIATION OF EARLY REPOLARIZATION WITH RISK OF CARDIAC MORTALITY IN
... population. Background. Early repolarization, which is characterized by an elevation of the Jpoint on 12-lead electrocardiography, is a common finding that has been considered as benign for decades. However, in the last years, it has been related with vulnerability to idiopathic ventricular fibrilla ...
... population. Background. Early repolarization, which is characterized by an elevation of the Jpoint on 12-lead electrocardiography, is a common finding that has been considered as benign for decades. However, in the last years, it has been related with vulnerability to idiopathic ventricular fibrilla ...
Clinical Relevance of the Bezold–Jarisch Reflex
... pressures (but not mean arterial pressures), there is no change or a slight decrease in renin release.45 With larger hemorrhage or with negative pressure (⫺40 mmHg) applied to the lower limbs, there were changes in heart rate and arterial blood pressure in conjunction with an increase in plasma reni ...
... pressures (but not mean arterial pressures), there is no change or a slight decrease in renin release.45 With larger hemorrhage or with negative pressure (⫺40 mmHg) applied to the lower limbs, there were changes in heart rate and arterial blood pressure in conjunction with an increase in plasma reni ...
The pathobiology of isolated systolic hypertension
... and falls with increased large artery stiffness, DBP displays a J-curve pattern of CV risk; thus, PP is a stronger risk factor than systolic blood pressure (SBP) in patients with ISH when DBP is o70 mmHg. ISH can develop from either ‘‘burned-out’’ diastolic hypertension or de novo, secondary to incr ...
... and falls with increased large artery stiffness, DBP displays a J-curve pattern of CV risk; thus, PP is a stronger risk factor than systolic blood pressure (SBP) in patients with ISH when DBP is o70 mmHg. ISH can develop from either ‘‘burned-out’’ diastolic hypertension or de novo, secondary to incr ...
Components of Left Ventricular Ejection and Filling in Patients with
... AR, 34 patients with severe AR, and 28 healthy subjects (control group). Severity of AR was assessed according to the recommendations for evaluation of the severity of native valvular regurgitation with 2-dimensional and Doppler echocardiography (14). The patients were recruited from the inpatient a ...
... AR, 34 patients with severe AR, and 28 healthy subjects (control group). Severity of AR was assessed according to the recommendations for evaluation of the severity of native valvular regurgitation with 2-dimensional and Doppler echocardiography (14). The patients were recruited from the inpatient a ...
Coexistence of bicuspid aortic valve, aberrant right subclavian artery
... Right aberrant subclavian artery (ASA) also known as arteria lusoria is considered to be rare, however normal variant of the aortic branching. It usually takes-off distal to the left subclavian artery and crosses usually behind the esophagus to the right upper extremity. Such course of the right ASA ...
... Right aberrant subclavian artery (ASA) also known as arteria lusoria is considered to be rare, however normal variant of the aortic branching. It usually takes-off distal to the left subclavian artery and crosses usually behind the esophagus to the right upper extremity. Such course of the right ASA ...
Diastolic Function Assessment: Yes you can!
... shows a mild increase. With increase in left atrial pressures and progression of diastolic dysfunction to more restrictive physiology, the peak A’ velocity decreases. However, the decrease in E’ is more marked in these later stages of diastolic dysfunction. The decrease in peak E’ velocity can be us ...
... shows a mild increase. With increase in left atrial pressures and progression of diastolic dysfunction to more restrictive physiology, the peak A’ velocity decreases. However, the decrease in E’ is more marked in these later stages of diastolic dysfunction. The decrease in peak E’ velocity can be us ...
Imaging the motion of the heart with
... ejection fraction (LVEF) where normal LVEF = (stroke volume)/(end-diastolic volume) falls in the 50% or greater range. No analogous simple, dimensionless parameter of diastolic function has been proposed. To appreciate the meaning of “diastolic function” the elegant and curious physiology of filling ...
... ejection fraction (LVEF) where normal LVEF = (stroke volume)/(end-diastolic volume) falls in the 50% or greater range. No analogous simple, dimensionless parameter of diastolic function has been proposed. To appreciate the meaning of “diastolic function” the elegant and curious physiology of filling ...
historical summary of the relevant facts in
... The French physiologist and physicist developed the capillary electrometer. The device consisted of a thin glass tube with a column of mercury located beneath sulfuric acid. The mercury surface moved with the electrical potential variations and was observed through a microscope. The best recording d ...
... The French physiologist and physicist developed the capillary electrometer. The device consisted of a thin glass tube with a column of mercury located beneath sulfuric acid. The mercury surface moved with the electrical potential variations and was observed through a microscope. The best recording d ...
Myocardial Mural Thickness During the Cardiac Cycle
... between diastole and systole. It was not possible to determine the magnitude of this error, but it was estimated to be small since special care was used to keep the spring tension as light as possible. The change in turgor of the myocardium during the ejection phase of systole is probably not very g ...
... between diastole and systole. It was not possible to determine the magnitude of this error, but it was estimated to be small since special care was used to keep the spring tension as light as possible. The change in turgor of the myocardium during the ejection phase of systole is probably not very g ...
Hypertrophic cardiomyopathy
Hypertrophic cardiomyopathy (HCM) is a primary disease of the myocardium (the muscle of the heart) in which a portion of the myocardium is hypertrophied (thickened) without any obvious cause, creating functional impairment of the cardiac muscle. It is a leading cause of sudden cardiac death in young athletes.The occurrence of hypertrophic cardiomyopathy is a significant cause of sudden unexpected cardiac death in any age group and as a cause of disabling cardiac symptoms. Younger people are likely to have a more severe form of hypertrophic cardiomyopathy.HCM is frequently asymptomatic until sudden cardiac death, and for this reason some suggest routinely screening certain populations for this disease.A cardiomyopathy is a disease that affects the muscle of the heart. With HCM, the myocytes (cardiac contractile cells) in the heart increase in size, which results in the thickening of the heart muscle. In addition, the normal alignment of muscle cells is disrupted, a phenomenon known as myocardial disarray. HCM also causes disruptions of the electrical functions of the heart. HCM is most commonly due to a mutation in one of nine sarcomeric genes that results in a mutated protein in the sarcomere, the primary component of the myocyte (the muscle cell of the heart). These are predominantly single-point missense mutations in the genes for beta-myosin heavy chain (MHC), myosin-binding protein C, cardiac troponinT, or tropomyosin. These mutations cause myofibril and myocyte structural abnormalities and possible deficiencies in force generation. Not to be confused with dilated cardiomyopathy or any other cardiomyopathy.While most literature so far focuses on European, American, and Japanese populations, HCM appears in all ethnic groups. The prevalence of HCM is about 0.2% to 0.5% of the general population.