The Effects of Variations in Conductivity and Geometrical
... model limits attention solely to the effect of changes in cavity conductivity. Clinically, Figure 2 simulates the effect of variations in hematocrit on the ECG. Hence, patients with anemia (low hematocrit) are expected to have high surface potentials, whereas potentials lower than normal are expecte ...
... model limits attention solely to the effect of changes in cavity conductivity. Clinically, Figure 2 simulates the effect of variations in hematocrit on the ECG. Hence, patients with anemia (low hematocrit) are expected to have high surface potentials, whereas potentials lower than normal are expecte ...
Positive Psychology and Men: The Tell
... from each other, such that heart rate and HRV can increase due to activation in the SNS, withdrawal or decrease in inhibition from the PNS, or some combination of the two. Likewise, heart rate and HRV can decrease due to increased PNS activity or reduced SNS activity. Finally, the SNS and PNS can be ...
... from each other, such that heart rate and HRV can increase due to activation in the SNS, withdrawal or decrease in inhibition from the PNS, or some combination of the two. Likewise, heart rate and HRV can decrease due to increased PNS activity or reduced SNS activity. Finally, the SNS and PNS can be ...
Mitochondria Oxidative Stress, Connexin43 Remodeling, and
... ROS. We sought to determine the source of ROS and whether ROS played a role in the arrhythmogenesis. Methods and Results—Wild-type and ACE8/8 mice with and without 2 weeks of treatment with L-NIO (NO synthase inhibitor), sepiapterin (precursor of tetrahydrobiopterin), MitoTEMPO (mitochondria-targete ...
... ROS. We sought to determine the source of ROS and whether ROS played a role in the arrhythmogenesis. Methods and Results—Wild-type and ACE8/8 mice with and without 2 weeks of treatment with L-NIO (NO synthase inhibitor), sepiapterin (precursor of tetrahydrobiopterin), MitoTEMPO (mitochondria-targete ...
Responses of cardiac natriuretic peptides after paroxysmal
... healthy were enrolled into the study. The patients who had chronic obstructive lung ...
... healthy were enrolled into the study. The patients who had chronic obstructive lung ...
Focused 2012 Update of the Canadian Cardiovascular Society Atrial
... components (age 65-74, vascular disease, and female sex) contributed significantly to risk prediction in univariate analysis, but female sex did not make a significant contribution in a multivariate model. The value of assigning a point for female sex continues to be debated.11 The c-statistics were ...
... components (age 65-74, vascular disease, and female sex) contributed significantly to risk prediction in univariate analysis, but female sex did not make a significant contribution in a multivariate model. The value of assigning a point for female sex continues to be debated.11 The c-statistics were ...
Cholesterol Reduction - Synergy Oviedo Chiropractic
... small increases in weight may increase cholesterol and the general risk of cardiovascular disease. Physical activity/exercise Frequent physical activity may lower LDL cholesterol and raise HDL cholesterol levels. Age and sex Before menopause, women usually have total cholesterol levels that are lowe ...
... small increases in weight may increase cholesterol and the general risk of cardiovascular disease. Physical activity/exercise Frequent physical activity may lower LDL cholesterol and raise HDL cholesterol levels. Age and sex Before menopause, women usually have total cholesterol levels that are lowe ...
Knotting of a pulmonary artery catheter in the superior vena cava
... responsible for more than two thirds of all reported intravascular knots. This may be because these catheters are thin walled, long, and soft and are usually placed without fluoroscopic guidance.6 If the catheter bends over itself on introduction, its further insertion may cause the formation of a k ...
... responsible for more than two thirds of all reported intravascular knots. This may be because these catheters are thin walled, long, and soft and are usually placed without fluoroscopic guidance.6 If the catheter bends over itself on introduction, its further insertion may cause the formation of a k ...
AHA/ACCF/ESC Scientific Statement
... and cardiovascular pathology was convened by the American Heart Association (AHA), the American College of Cardiology (ACC), and the European Society of Cardiology (ESC). The present Writing Group was charged with reviewing the published literature on the role of EMB in cardiovascular diseases, summ ...
... and cardiovascular pathology was convened by the American Heart Association (AHA), the American College of Cardiology (ACC), and the European Society of Cardiology (ESC). The present Writing Group was charged with reviewing the published literature on the role of EMB in cardiovascular diseases, summ ...
Prescribing an Exercise Program for the Older Adult
... reduce the risk for diabetic complications. No significant change in body mass was seen when compared to controls. Studies including individuals over age 60 years have demonstrated similar findings. Boule: JAMA 2001; 286:1218-27 ...
... reduce the risk for diabetic complications. No significant change in body mass was seen when compared to controls. Studies including individuals over age 60 years have demonstrated similar findings. Boule: JAMA 2001; 286:1218-27 ...
Epicardial cyst- a case report
... silhouette had been reported on mass miniature radiography. He had been treated for rheumatic fever at the age of 7 years. He smoked 20 cigarettes a day until 1964 and consumed moderate quantities of alcohol. Examination revealed a healthy, heavily built man; there were no abnormal physical signs ex ...
... silhouette had been reported on mass miniature radiography. He had been treated for rheumatic fever at the age of 7 years. He smoked 20 cigarettes a day until 1964 and consumed moderate quantities of alcohol. Examination revealed a healthy, heavily built man; there were no abnormal physical signs ex ...
2014 Life threatening causes of syncope
... the types of syncope. We refer the reader to the other articles in this Special Syncope Issue that outline the investigation of syncope-type symptoms and describe other causes of syncope (Van Dijk and Lim). ...
... the types of syncope. We refer the reader to the other articles in this Special Syncope Issue that outline the investigation of syncope-type symptoms and describe other causes of syncope (Van Dijk and Lim). ...
Echocardiographic assessment of diastolic function Steve R. Ommen, MD
... than 30 ms had 86% survival at 2 years. This was the strongest predictor among the variables considered, including level of systolic function [24•]. Despite these important observations in the PV, some limitations must be realized. The most problematic limitation is the overall feasibility of obtain ...
... than 30 ms had 86% survival at 2 years. This was the strongest predictor among the variables considered, including level of systolic function [24•]. Despite these important observations in the PV, some limitations must be realized. The most problematic limitation is the overall feasibility of obtain ...
Canadian Cardiovascular Society Atrial Fibrillation Guidelines 2010
... heart rate target of ⬍100 bpm at rest be used for most patients. In all cases, the heart rate target may need modification based on patient symptoms and preferences. Patients with persistent or permanent AF or AFL who have exertional symptoms possibly due to excessive heart rates should have an asse ...
... heart rate target of ⬍100 bpm at rest be used for most patients. In all cases, the heart rate target may need modification based on patient symptoms and preferences. Patients with persistent or permanent AF or AFL who have exertional symptoms possibly due to excessive heart rates should have an asse ...
Treatment of arrhythmogenic right ventricular
... events and death. Table 3 reports the clinical variables identified as independent predictors of poor outcome including malignant arrhythmic events (i.e. SCD, cardiac arrest due to VF, appropriate ICD interventions, or ICD therapy on fast VT/VF), non-SCD, or heart transplantation, which were found i ...
... events and death. Table 3 reports the clinical variables identified as independent predictors of poor outcome including malignant arrhythmic events (i.e. SCD, cardiac arrest due to VF, appropriate ICD interventions, or ICD therapy on fast VT/VF), non-SCD, or heart transplantation, which were found i ...
Atrial Septal Defect Presenting in a 70-Year
... occur in one-third of adults with congenital heart disease.1 There are three types of ASDs: Secundum defect, primum defect, and sinus venosus defect. Ostium secundum defect is the most common type of ASD, accounting for 50-70% of all ASDs. This defect is present at the site of fossa ovalis, allowing ...
... occur in one-third of adults with congenital heart disease.1 There are three types of ASDs: Secundum defect, primum defect, and sinus venosus defect. Ostium secundum defect is the most common type of ASD, accounting for 50-70% of all ASDs. This defect is present at the site of fossa ovalis, allowing ...
Abdominal Aortic Aneurysm Resection: Transperitoneal Approach
... wall. Pseudoaneurysms are contained hematomas that result from localized arterial trauma, such as that which occurs during angioplasty. The shape of an aneurysm is commonly described as saccular verses fusiform. In general, saccular aneurysms are believed to have a higher risk of associated rupture. ...
... wall. Pseudoaneurysms are contained hematomas that result from localized arterial trauma, such as that which occurs during angioplasty. The shape of an aneurysm is commonly described as saccular verses fusiform. In general, saccular aneurysms are believed to have a higher risk of associated rupture. ...
The Veterinary Journal - Repositório Aberto da Universidade do Porto
... (Dupras et al., 2001). In fact, although these agents cause minimal cardiorespiratory depression, it has also been reported that they may lead to increased heart rate in humans (Marlow et al., 1991). Some echocardiographic parameters are particularly sensitive to high heart rates, e.g., mitral E- an ...
... (Dupras et al., 2001). In fact, although these agents cause minimal cardiorespiratory depression, it has also been reported that they may lead to increased heart rate in humans (Marlow et al., 1991). Some echocardiographic parameters are particularly sensitive to high heart rates, e.g., mitral E- an ...
Echocardiographic Evaluation ofLeft Ventricular Size
... and systole (Ds) and to assess ventricular performance by computing the percent dimensional shortening (%AD) and the normalized rate of dimensional shortening (Vd) during isometric and isotonic exercise in normal subjects. In 27 subjects, isometric handgrip exercise at 50% of maximum grip until fati ...
... and systole (Ds) and to assess ventricular performance by computing the percent dimensional shortening (%AD) and the normalized rate of dimensional shortening (Vd) during isometric and isotonic exercise in normal subjects. In 27 subjects, isometric handgrip exercise at 50% of maximum grip until fati ...
Atrial Fibrillation and Sleep Apnea: What You Need to Know
... is caused by chaotic electrical signals, which make the upper chambers of the heart (the atria) quiver, instead of contracting properly. During AFib, blood pools in the atria, which can allow a clot to form. If a blood clot breaks free, it can enter the bloodstream and cause a stroke. People with AF ...
... is caused by chaotic electrical signals, which make the upper chambers of the heart (the atria) quiver, instead of contracting properly. During AFib, blood pools in the atria, which can allow a clot to form. If a blood clot breaks free, it can enter the bloodstream and cause a stroke. People with AF ...
Atrial Fibrillation and Sleep Apnea
... is caused by chaotic electrical signals, which make the upper chambers of the heart (the atria) quiver, instead of contracting properly. During AFib, blood pools in the atria, which can allow a clot to form. If a blood clot breaks free, it can enter the bloodstream and cause a stroke. People with AF ...
... is caused by chaotic electrical signals, which make the upper chambers of the heart (the atria) quiver, instead of contracting properly. During AFib, blood pools in the atria, which can allow a clot to form. If a blood clot breaks free, it can enter the bloodstream and cause a stroke. People with AF ...
Cardiovascular mortality and N-terminal
... this intervention study. All citizens aged between 70 and 88 years (n = 1320) had previously participated in an epidemiological study and had been continuously followed with medical examinations since 1998. A total of 876 people accepted the invitation to that study. We invited these participants to ...
... this intervention study. All citizens aged between 70 and 88 years (n = 1320) had previously participated in an epidemiological study and had been continuously followed with medical examinations since 1998. A total of 876 people accepted the invitation to that study. We invited these participants to ...
Right ventricular cardiac myxoma. Histopathology diagnosis in
... Peachell J, Mullen J, Benthley M, Taylor D. Biatrial myxoma: a rare cardiac tumor. Am Thorac Surg 1998; 65:1768-1769. Redy DJ, Rao TS, Venkaiah KR, Gupta KG, Devi PS, Naidu NV. Congenital myxoma of the heart Indian. J Pediatr 1956; 23:210-212. Liebler GA, Magovern GJ, Park SB, Cushung WJ, Begg FR, J ...
... Peachell J, Mullen J, Benthley M, Taylor D. Biatrial myxoma: a rare cardiac tumor. Am Thorac Surg 1998; 65:1768-1769. Redy DJ, Rao TS, Venkaiah KR, Gupta KG, Devi PS, Naidu NV. Congenital myxoma of the heart Indian. J Pediatr 1956; 23:210-212. Liebler GA, Magovern GJ, Park SB, Cushung WJ, Begg FR, J ...
Hybrid management of a large atrial septal defect and a patent
... at older ages. Also, the procedure is not as easy from the technical standpoint and devices that are not promptly available in our hands may be required for optimal positioning and conformation to ductal anatomy.[13] As ASDs seldom cause significant symptomatology in small children, the experience w ...
... at older ages. Also, the procedure is not as easy from the technical standpoint and devices that are not promptly available in our hands may be required for optimal positioning and conformation to ductal anatomy.[13] As ASDs seldom cause significant symptomatology in small children, the experience w ...
THE CARDIOVASCULAR HISTORY AND PHYSICAL EXAMINATION
... Often has systolic and diastolic components. It may be audible over any part of the precordium ,usually heard best in the 3rd interspace to the left of the sternum (Erb Botkin)and is often very localized, does not radiate. Intensity varies over time, increases when the patient leans forward and duri ...
... Often has systolic and diastolic components. It may be audible over any part of the precordium ,usually heard best in the 3rd interspace to the left of the sternum (Erb Botkin)and is often very localized, does not radiate. Intensity varies over time, increases when the patient leans forward and duri ...
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.