Normal electrocardiographic findings: recognising
... of the S wave in V1 and the R wave in V5 or V6 (using the largest R wave) as >3.5 mV (35 small squares with a standard amplification of the ECG at 10 mm/1 mV). The isolated presence of high QRS voltages fulfilling the Sokolow-Lyon voltage criterion for LVH is regarded as a normal finding in athletes re ...
... of the S wave in V1 and the R wave in V5 or V6 (using the largest R wave) as >3.5 mV (35 small squares with a standard amplification of the ECG at 10 mm/1 mV). The isolated presence of high QRS voltages fulfilling the Sokolow-Lyon voltage criterion for LVH is regarded as a normal finding in athletes re ...
n°32 December 2016
... addressing the changes in absolute (i.e. average) and oscillatory (i.e. phasic) changes in sympathetic activity in response to variations in pressure intended to alter the (central) balance between excitatory and inhibitory regulation showed a compelling evidence for a relationship between changes i ...
... addressing the changes in absolute (i.e. average) and oscillatory (i.e. phasic) changes in sympathetic activity in response to variations in pressure intended to alter the (central) balance between excitatory and inhibitory regulation showed a compelling evidence for a relationship between changes i ...
Coupled systolic-ventricular and vascular stiffening with age
... matching independent of age, but imposed a limitation on net ventricular-arterial interaction. Specifically, varying cardiac filling led to disproportionately greater changes in systolic pressure in older individuals. This may amplify effects of autonomic and baroreflex dysfunction often present in ...
... matching independent of age, but imposed a limitation on net ventricular-arterial interaction. Specifically, varying cardiac filling led to disproportionately greater changes in systolic pressure in older individuals. This may amplify effects of autonomic and baroreflex dysfunction often present in ...
Six Lead ECG
... are triggered by the coordinated electrical activity of the myocardial cells in the heart. The electrical currents produced by the heart are large and can be recorded through electrodes placed on the skin. The recording is known as an electrocardiogram or ECG (Figure HH-4-B1). When diagnosing the he ...
... are triggered by the coordinated electrical activity of the myocardial cells in the heart. The electrical currents produced by the heart are large and can be recorded through electrodes placed on the skin. The recording is known as an electrocardiogram or ECG (Figure HH-4-B1). When diagnosing the he ...
Patient Guide - New Hanover Regional Medical Center
... be reduced enough to cause angina or heart attack. Angina: Angina is pain or discomfort in the chest, arm, or jaw that occurs when not enough blood flows to the heart muscle. Angina is a warning sign that the coronary arteries may be narrowed or blocked. Angina typically occurs during physical exert ...
... be reduced enough to cause angina or heart attack. Angina: Angina is pain or discomfort in the chest, arm, or jaw that occurs when not enough blood flows to the heart muscle. Angina is a warning sign that the coronary arteries may be narrowed or blocked. Angina typically occurs during physical exert ...
mechanical properties of the heart
... head rotates and extends the hinge region. Force generated by a single sarcomere is proportional to the number of actin-myosin bonds and the free energy of ATP hydrolysis. The state of actinmyosin binding following ATP hydrolysis is referred to as the rigor state, because in the absence of additiona ...
... head rotates and extends the hinge region. Force generated by a single sarcomere is proportional to the number of actin-myosin bonds and the free energy of ATP hydrolysis. The state of actinmyosin binding following ATP hydrolysis is referred to as the rigor state, because in the absence of additiona ...
African Journal for Physical, Health Education, Recreation and Dance (AJPHERD)
... cardiovascular risk profile (Eckblom, ...
... cardiovascular risk profile (Eckblom, ...
Six Lead ECG
... are triggered by the coordinated electrical activity of the myocardial cells in the heart. The electrical currents produced by the heart are large and can be recorded through electrodes placed on the skin. The recording is known as an electrocardiogram or ECG (Figure HH-4-B1). When diagnosing the he ...
... are triggered by the coordinated electrical activity of the myocardial cells in the heart. The electrical currents produced by the heart are large and can be recorded through electrodes placed on the skin. The recording is known as an electrocardiogram or ECG (Figure HH-4-B1). When diagnosing the he ...
CAUSE: Cardiac arrest ultra-sound exam
... for experienced practitioners manual is dedicated to this topic and its practical application.2 Hughes et al. provided a list of the etiologies of PEA in the order of frequency and ease of reversal.3 He lists the top five conditions as hypoxia, hypovolemia, tension pneumothorax, pericardial tamponad ...
... for experienced practitioners manual is dedicated to this topic and its practical application.2 Hughes et al. provided a list of the etiologies of PEA in the order of frequency and ease of reversal.3 He lists the top five conditions as hypoxia, hypovolemia, tension pneumothorax, pericardial tamponad ...
Candidate`s Declaration
... physicians and nurses with diverse data (ranging from clinical observations to laboratory results to online data) provided by bedside medical equipment. New monitoring devices provide health care professionals with unsurpassed amounts of information to support decision making. Ironically, rather tha ...
... physicians and nurses with diverse data (ranging from clinical observations to laboratory results to online data) provided by bedside medical equipment. New monitoring devices provide health care professionals with unsurpassed amounts of information to support decision making. Ironically, rather tha ...
compnay reports
... with other new cardiac devices, believe that the adoption of any new medical technology – no matter how useful – takes time to overcome obstacles – such as reimbursement issues and limited field experience. Sample of Alliance Member Responses a. Members Who Said: “Physicians and other health care pr ...
... with other new cardiac devices, believe that the adoption of any new medical technology – no matter how useful – takes time to overcome obstacles – such as reimbursement issues and limited field experience. Sample of Alliance Member Responses a. Members Who Said: “Physicians and other health care pr ...
4 Arrhythmias in Children and Young Adults Harinder R. Singh
... periods. Sinus node dysfunction increases in frequency with age of the patient and time from surgery. 4.1.5 Clinical presentation: It depends on the age, underlying cardiac conduction abnormality, and hemodynamic status. Although majority of children with structurally normal hearts remain asymptomat ...
... periods. Sinus node dysfunction increases in frequency with age of the patient and time from surgery. 4.1.5 Clinical presentation: It depends on the age, underlying cardiac conduction abnormality, and hemodynamic status. Although majority of children with structurally normal hearts remain asymptomat ...
Diagnosis of Arrhythmogenic Right Ventricular Dysplasia: A Review1
... Arrhythmogenic right ventricular dysplasia (ARVD) is a myocardial disorder of primarily the right ventricle, with unknown cause and prevalence and with a frequent familial occurrence. The typical clinical manifestation consists of ventricular arrhythmias with a left bundle branch block (LBBB) patter ...
... Arrhythmogenic right ventricular dysplasia (ARVD) is a myocardial disorder of primarily the right ventricle, with unknown cause and prevalence and with a frequent familial occurrence. The typical clinical manifestation consists of ventricular arrhythmias with a left bundle branch block (LBBB) patter ...
Gated blood pool SPECT improves reproducibility of right and left
... sets have limited the clinical applicability of GBPS. Advances in multidetector gamma cameras and high performance computer systems have recently increased system sensitivity, and have decreased acquisition and processing times to within clinically acceptable limits. In addition, automatic algorithm ...
... sets have limited the clinical applicability of GBPS. Advances in multidetector gamma cameras and high performance computer systems have recently increased system sensitivity, and have decreased acquisition and processing times to within clinically acceptable limits. In addition, automatic algorithm ...
The physiologic mechanisms of cardiac and vascular
... precordial movement palpated at the mid to lower left sternal edge and in the subxiphoid region. With norm al growth and devel opment , the left ventricle gain s weight much more rapidl y than the right , so that in older children and adults, the norm al precordial impulse is left ventricular (l) (F ...
... precordial movement palpated at the mid to lower left sternal edge and in the subxiphoid region. With norm al growth and devel opment , the left ventricle gain s weight much more rapidl y than the right , so that in older children and adults, the norm al precordial impulse is left ventricular (l) (F ...
Introducing a novel mechanism to control heart rate in the ancestral
... autocrine adrenergic tonus acting presumably on the primary cardiac pacemaker cells located in the sinoatrial node, which would set the intrinsic cardiac pacemaker rate (Farrell, 2007). To date the sinoatrial node has not been identified in any hagfish species, but is presumed to be present in E. ci ...
... autocrine adrenergic tonus acting presumably on the primary cardiac pacemaker cells located in the sinoatrial node, which would set the intrinsic cardiac pacemaker rate (Farrell, 2007). To date the sinoatrial node has not been identified in any hagfish species, but is presumed to be present in E. ci ...
Cardiac Hypertrophy: A Review on Pathogenesis and Treatment
... hypertrophy is regarded as the myocardial response to a variety of extrinsic and intrinsic stimuli that impose increased biomechanical stress. The diagnosis is usually based on the calculated echocardiographic or magnetic resonance imaging estimate of the left ventricular mass. Further, the cardiac ...
... hypertrophy is regarded as the myocardial response to a variety of extrinsic and intrinsic stimuli that impose increased biomechanical stress. The diagnosis is usually based on the calculated echocardiographic or magnetic resonance imaging estimate of the left ventricular mass. Further, the cardiac ...
Statement on cardiopulmonary exercise testing in chronic heart
... is more strongly dependent on ventilation than is VO2. For example, before the beginning of exercise, if psychogenic hyperventilation is present, measured VCO2 is higher than VO2. During short-duration exercise, glycogen is used primarily by the muscles for energy, and the relation between O2 consum ...
... is more strongly dependent on ventilation than is VO2. For example, before the beginning of exercise, if psychogenic hyperventilation is present, measured VCO2 is higher than VO2. During short-duration exercise, glycogen is used primarily by the muscles for energy, and the relation between O2 consum ...
"Artificial Heart Valves". In: Encyclopedia of Biomedical Engineering
... Valvular diseases associate with cell activation and alterations in metabolism of collagen and proteoglycans. These structural changes induce functional modifications that eventually lead to malfunction. The causes of valvular diseases are typically associated with congenital defects, atherosclerosi ...
... Valvular diseases associate with cell activation and alterations in metabolism of collagen and proteoglycans. These structural changes induce functional modifications that eventually lead to malfunction. The causes of valvular diseases are typically associated with congenital defects, atherosclerosi ...
full article
... both the limited availability of echocardiography in community settings and its expense may not make it the best screening test for patients with low probability of LV dysfunction. Although studies using logistic regression models with features of the history, physical examination, chest x-ray film, ...
... both the limited availability of echocardiography in community settings and its expense may not make it the best screening test for patients with low probability of LV dysfunction. Although studies using logistic regression models with features of the history, physical examination, chest x-ray film, ...
Drug induced QT prolongation: the measurement and assessment of
... channels) and mutations in regulatory protein coding genes [9, 10]. Most of these may be associated with poor outcomes and have been reviewed in detail elsewhere ...
... channels) and mutations in regulatory protein coding genes [9, 10]. Most of these may be associated with poor outcomes and have been reviewed in detail elsewhere ...
Cardiovascular Manifestations of Tuberous Sclerosis Complex and
... possibility that the underlying pathogenesis of all rhabdomyomas is a result of a spectrum of TSC disease. Cardiac rhabdomyomas are typically well circumscribed and nonencapsulated (FigureB). Micropathologic examination demonstrates abnormal myocyte architecture, including vacuolization and pathogno ...
... possibility that the underlying pathogenesis of all rhabdomyomas is a result of a spectrum of TSC disease. Cardiac rhabdomyomas are typically well circumscribed and nonencapsulated (FigureB). Micropathologic examination demonstrates abnormal myocyte architecture, including vacuolization and pathogno ...
Impact of obstructive sleep apnoea on diastolic function
... diastolic function in a primary care cohort of patients with cardiovascular risk factors. 378 study participants with risk factors for diastolic dysfunction were prospectively included and a polygraphy was performed in all patients. Diastolic dysfunction was assessed by comprehensive echocardiograph ...
... diastolic function in a primary care cohort of patients with cardiovascular risk factors. 378 study participants with risk factors for diastolic dysfunction were prospectively included and a polygraphy was performed in all patients. Diastolic dysfunction was assessed by comprehensive echocardiograph ...
Evaluation of the Role of IKACh in Atrial Fibrillation Using a Mouse
... *p ⬍ 0.001; †p ⬍ 0.01; ‡p ⬍ 0.05; §Indicates variable with an interaction effect. Statistical analysis was performed using two-way analysis of variance. Data are presented as the number (%) of patients or the mean value ⫾ SD. All times are given in milliseconds. AV ⫽ atrioventricular; CCh ⫽ carbacho ...
... *p ⬍ 0.001; †p ⬍ 0.01; ‡p ⬍ 0.05; §Indicates variable with an interaction effect. Statistical analysis was performed using two-way analysis of variance. Data are presented as the number (%) of patients or the mean value ⫾ SD. All times are given in milliseconds. AV ⫽ atrioventricular; CCh ⫽ carbacho ...
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.