Global Bi-ventricular endocardial distribution of activation rate
... that the excitation frequency is an important index in VF that can reflect the underlying myocardial pathophysiology; it may also be predictive of the defibrillation threshold [10]. Previous studies have reported that the dynamics of VF in heart failure (HF) hearts differ from those in normal hearts ...
... that the excitation frequency is an important index in VF that can reflect the underlying myocardial pathophysiology; it may also be predictive of the defibrillation threshold [10]. Previous studies have reported that the dynamics of VF in heart failure (HF) hearts differ from those in normal hearts ...
Left Heart Failure With a Normal Ejection Fraction: Identification of
... syndrome, a single pathophysiologic mechanism, diastolic dysfunction, is often ascribed to explain this condition. In view of the clinical heterogeneity of these patients, we hypothesized that subgroups of HFNEF patients may have different underlying pathophysiologic mechanisms. Methods and Results: ...
... syndrome, a single pathophysiologic mechanism, diastolic dysfunction, is often ascribed to explain this condition. In view of the clinical heterogeneity of these patients, we hypothesized that subgroups of HFNEF patients may have different underlying pathophysiologic mechanisms. Methods and Results: ...
Getting a New Heart
... Your doctor and transplant staff will watch for these signs: 1. Rejection: The risk of rejection never goes away. You will always need anti-rejection drugs. Your doctor may lower the dosage, but you should never skip or stop taking the drugs. A biopsy of the heart is the best way to know if your bo ...
... Your doctor and transplant staff will watch for these signs: 1. Rejection: The risk of rejection never goes away. You will always need anti-rejection drugs. Your doctor may lower the dosage, but you should never skip or stop taking the drugs. A biopsy of the heart is the best way to know if your bo ...
THE ROLE OF AUTONOMIC AND MYOCARDIAL FACTORS I.N
... pointed out by Rushmer (5). Even in experimental animals, the role of increase of stroke voltume and, by inference. of intrinsic myocardial factors, is difficult to assess because such factors, if present, are obscured by powerful autonomic effects. The need for quantitative studies in which autonom ...
... pointed out by Rushmer (5). Even in experimental animals, the role of increase of stroke voltume and, by inference. of intrinsic myocardial factors, is difficult to assess because such factors, if present, are obscured by powerful autonomic effects. The need for quantitative studies in which autonom ...
(Hemiechinus auritus) heart - Tubitak Journals
... In the evolutionary development of the vertebrate heart, the specialized atrioventricular conduction system appears as a phylogenetically new structural entity, which, to date, has been documented only in mammals and birds (Szabo et al., 1986). Moreover, in considering its development, it is very im ...
... In the evolutionary development of the vertebrate heart, the specialized atrioventricular conduction system appears as a phylogenetically new structural entity, which, to date, has been documented only in mammals and birds (Szabo et al., 1986). Moreover, in considering its development, it is very im ...
PACED Sudden Cardiac Arrest Prevention Powerpoint Seminar v2
... out of court for $1.7 million. The allegations of negligence levelled against the Board raised some interesting questions about the standard of care to which school boards may be held. Two days prior to the incident, the school Bezawit attended received a fax stating that she had a congenital heart ...
... out of court for $1.7 million. The allegations of negligence levelled against the Board raised some interesting questions about the standard of care to which school boards may be held. Two days prior to the incident, the school Bezawit attended received a fax stating that she had a congenital heart ...
Teacher`s Guide - Activity B13: EKG – Demonstration
... How does the electrical activity of the heart muscle look? Take time to write an answer to this question in the Lab Report section. Background ...
... How does the electrical activity of the heart muscle look? Take time to write an answer to this question in the Lab Report section. Background ...
Cardiac function of - Graduate School of Biomedical Sciences
... evaluated using unpaired t-tests. Since no sex differences were evident in either species, male and female data were combined. Data are expressed as means ⫾ SE. Unpaired t-tests (with Welch’s corrections if the variances were significantly different) were used to compare values between species for b ...
... evaluated using unpaired t-tests. Since no sex differences were evident in either species, male and female data were combined. Data are expressed as means ⫾ SE. Unpaired t-tests (with Welch’s corrections if the variances were significantly different) were used to compare values between species for b ...
Fulltext - Jultika
... (Setaro et al. 1992)) or pulmonary artery hypertension caused due to pulmonary diseases (e.g. chronic obstructive pulmonary disease (Matthay et al. 1982, Matthay & Mahler 1986, Matthay 1987)). Common to these mechanisms for right heart failure, however, is that they are all chronic processes which w ...
... (Setaro et al. 1992)) or pulmonary artery hypertension caused due to pulmonary diseases (e.g. chronic obstructive pulmonary disease (Matthay et al. 1982, Matthay & Mahler 1986, Matthay 1987)). Common to these mechanisms for right heart failure, however, is that they are all chronic processes which w ...
Introduction to fetal echo
... The Eustachian valve (the junctional fold between the inferior vena cava and the right atrium) directs the inferior vena caval flow toward the foramen ovale that is very close to the inferior vena cava. The inferior caval flow itself is divided into two components: the oxygenated blood coming from ...
... The Eustachian valve (the junctional fold between the inferior vena cava and the right atrium) directs the inferior vena caval flow toward the foramen ovale that is very close to the inferior vena cava. The inferior caval flow itself is divided into two components: the oxygenated blood coming from ...
Recommendations for the management of individuals with acquired
... inadequate rise in blood pressure, arrhythmias, marked ST-segment depression or inadequate exercise tolerance [2,3] or the development of symptoms not present during daily life activities. In certain cases, Holter-ECG may be useful to detect arrhythmias. Cardiac catheterization may occasionally be r ...
... inadequate rise in blood pressure, arrhythmias, marked ST-segment depression or inadequate exercise tolerance [2,3] or the development of symptoms not present during daily life activities. In certain cases, Holter-ECG may be useful to detect arrhythmias. Cardiac catheterization may occasionally be r ...
Look4MySounds - Estudo Geral
... Cardiovascular diseases (CVDs) are the leading cause of death worldwide. Obesity, population ageing, sedentary lifestyles, the rise of chronic diseases incidence and many other factors continue to increase this epidemic, with devastating causes. The cost of CVDs in Europe is estimated to be almost € ...
... Cardiovascular diseases (CVDs) are the leading cause of death worldwide. Obesity, population ageing, sedentary lifestyles, the rise of chronic diseases incidence and many other factors continue to increase this epidemic, with devastating causes. The cost of CVDs in Europe is estimated to be almost € ...
Pulmonary Artery Catheter
... Establishment of central venous access – Accidental puncture of adjacent arteries – Bleeding – Neuropathy – Air embolism – Pneumothorax ...
... Establishment of central venous access – Accidental puncture of adjacent arteries – Bleeding – Neuropathy – Air embolism – Pneumothorax ...
Effects of Long-Term Biventricular Stimulation for
... the beneficial mechanical systolic response.15,16 This suggests that QRS duration at baseline may be a relatively crude measure of dyssynchrony. In addition, in this study, no attempt was made to find the LV stimulation site that would result in the narrowest QRS duration. The finding that plasma no ...
... the beneficial mechanical systolic response.15,16 This suggests that QRS duration at baseline may be a relatively crude measure of dyssynchrony. In addition, in this study, no attempt was made to find the LV stimulation site that would result in the narrowest QRS duration. The finding that plasma no ...
Percutaneous implantation of the left ventricular
... motion abnormalities following myocardial infarction. In one patient, the VPD was removed 3 days post implantation and the patient subsequently died due to extra-cardiac sepsis. When compared with baseline, there was significant improvement at 6 and 12 months following VPD implantation in NYHA class ...
... motion abnormalities following myocardial infarction. In one patient, the VPD was removed 3 days post implantation and the patient subsequently died due to extra-cardiac sepsis. When compared with baseline, there was significant improvement at 6 and 12 months following VPD implantation in NYHA class ...
THE ROLE OF AUTONOMIC AND MYOCARDIAL FACTORS I.N
... pointed out by Rushmer (5). Even in experimental animals, the role of increase of stroke voltume and, by inference. of intrinsic myocardial factors, is difficult to assess because such factors, if present, are obscured by powerful autonomic effects. The need for quantitative studies in which autonom ...
... pointed out by Rushmer (5). Even in experimental animals, the role of increase of stroke voltume and, by inference. of intrinsic myocardial factors, is difficult to assess because such factors, if present, are obscured by powerful autonomic effects. The need for quantitative studies in which autonom ...
Fluid dynamics of the heart and its valves.
... through which it is distributed to all of the tissues of the body, including the heart muscle (via the coronary arteries). As it flows through these various tissues, part of the oxygen is removed, and the color changes from bright red to bluish red. At the same time, carbon dioxide that has been gen ...
... through which it is distributed to all of the tissues of the body, including the heart muscle (via the coronary arteries). As it flows through these various tissues, part of the oxygen is removed, and the color changes from bright red to bluish red. At the same time, carbon dioxide that has been gen ...
Table 1 - JACC: Cardiovascular Imaging
... Forum software (Philips Medical Systems, Best, the Netherlands). Segmental wall motion was graded semiquantitatively using a 16-segment model according to American Heart Association guidelines (8) and a 3-point scale (0 ⫽ normal wall motion, 1 ⫽ hypokinesia, 2 ⫽ akinesia or dyskinesia), and inducibl ...
... Forum software (Philips Medical Systems, Best, the Netherlands). Segmental wall motion was graded semiquantitatively using a 16-segment model according to American Heart Association guidelines (8) and a 3-point scale (0 ⫽ normal wall motion, 1 ⫽ hypokinesia, 2 ⫽ akinesia or dyskinesia), and inducibl ...
Cardiac autonomic responses to intermittent social conflict in rats
... Intermittent exposure to the same stressor can lead to a gradual decline in physiological, neuroendocrine and behavioral stress responses (habituation). We investigated possible habituation of cardiac autonomic responsiveness and susceptibility to cardiac arrhythmias in male rats exposed to either i ...
... Intermittent exposure to the same stressor can lead to a gradual decline in physiological, neuroendocrine and behavioral stress responses (habituation). We investigated possible habituation of cardiac autonomic responsiveness and susceptibility to cardiac arrhythmias in male rats exposed to either i ...
Genetic influence on electrocardiogram time intervals - AJP
... Both genetic and environmental factors influence HR, which may consequently affect ECG measurements (35). To obtain comparable and reliable data, we controlled possible extraneous variables by the following strategies: 1) the environment (light, temperature, noise, etc.) was carefully controlled; 2) ...
... Both genetic and environmental factors influence HR, which may consequently affect ECG measurements (35). To obtain comparable and reliable data, we controlled possible extraneous variables by the following strategies: 1) the environment (light, temperature, noise, etc.) was carefully controlled; 2) ...
Conus Artery in Coronary CT Angiography
... help visualize the conus artery even better than is documented in our study. According to the current recommendations, coronary CT angiography was performed in symptomatic patients with an intermediate probability of coronary artery disease. In most individuals, no flow-limiting plaques were discern ...
... help visualize the conus artery even better than is documented in our study. According to the current recommendations, coronary CT angiography was performed in symptomatic patients with an intermediate probability of coronary artery disease. In most individuals, no flow-limiting plaques were discern ...
Determinants of stroke volume and systolic and
... dependence on Z’Pthat is seen was not included in the analysis. We may expect that if appropriate analysis was done to include the additional II terms resulting from the E(t) shape factors (cx~,a2, nl, and n2), one could derive global relationships for pressures and SV Further research, however, is ...
... dependence on Z’Pthat is seen was not included in the analysis. We may expect that if appropriate analysis was done to include the additional II terms resulting from the E(t) shape factors (cx~,a2, nl, and n2), one could derive global relationships for pressures and SV Further research, however, is ...
FYSS 31
... blood pressure by approximately 7/5 mmHg (21) in people with mild to moderate essential hypertension. The blood pressure-lowering effect of physical activity is, not surprisingly, highest in people with established hypertension compared to those with normal blood pressure (2/2 mmHg (21). The effects ...
... blood pressure by approximately 7/5 mmHg (21) in people with mild to moderate essential hypertension. The blood pressure-lowering effect of physical activity is, not surprisingly, highest in people with established hypertension compared to those with normal blood pressure (2/2 mmHg (21). The effects ...
Thoracic Radiology
... uppermost lung is well inflated. If there is a lesion in the dependant lung it may not be visualised because of the lack of contrast in the dependant lung. In order to identify as many abnormalities as possible two opposing lateral studies should be taken. This is particularly important when screeni ...
... uppermost lung is well inflated. If there is a lesion in the dependant lung it may not be visualised because of the lack of contrast in the dependant lung. In order to identify as many abnormalities as possible two opposing lateral studies should be taken. This is particularly important when screeni ...
Myocardial infarction
Myocardial infarction (MI) or acute myocardial infarction (AMI), commonly known as a heart attack, occurs when blood flow stops to a part of the heart causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw. Often it is in the center or left side of the chest and lasts for more than a few minutes. The discomfort may occasionally feel like heartburn. Other symptoms may include shortness of breath, nausea, feeling faint, a cold sweat, or feeling tired. About 30% of people have atypical symptoms, with women more likely than men to present atypically. Among those over 75 years old, about 5% have had an MI with little or no history of symptoms. An MI may cause heart failure, an irregular heartbeat, or cardiac arrest.Most MIs occur due to coronary artery disease. Risk factors include high blood pressure, smoking, diabetes, lack of exercise, obesity, high blood cholesterol, poor diet, and excessive alcohol intake, among others. The mechanism of an MI often involves the rupture of an atherosclerotic plaque, leading to complete blockage of a coronary artery. MIs are less commonly caused by coronary artery spasms, which may be due to cocaine, significant emotional stress, and extreme cold, among others. A number of tests are useful to help with diagnosis, including electrocardiograms (ECGs), blood tests, and coronary angiography. An ECG may confirm an ST elevation MI if ST elevation is present. Commonly used blood tests include troponin and less often creatine kinase MB.Aspirin is an appropriate immediate treatment for a suspected MI. Nitroglycerin or opioids may be used to help with chest pain; however, they do not improve overall outcomes. Supplemental oxygen should be used in those with low oxygen levels or shortness of breath. In ST elevation MIs treatments which attempt to restore blood flow to the heart are typically recommended and include angioplasty, where the arteries are pushed open, or thrombolysis, where the blockage is removed using medications. People who have a non-ST elevation myocardial infarction (NSTEMI) are often managed with the blood thinner heparin, with the additional use angioplasty in those at high risk. In people with blockages of multiple coronary arteries and diabetes, bypass surgery (CABG) may be recommended rather than angioplasty. After an MI, lifestyle modifications, along with long term treatment with aspirin, beta blockers, and statins, are typically recommended.Worldwide, more than 3 million people have ST elevation MIs and 4 million have NSTEMIs each year. STEMIs occur about twice as often in men as women. About one million people have an MI each year in the United States. In the developed world the risk of death in those who have had an STEMI is about 10%. Rates of MI for a given age have decreased globally between 1990 and 2010.