Pradyot Saklani, Andrew Krahn and George Klein Syncope doi
... tachycardia is generally associated with relatively rapid recovery of mentation whereas vasovagal syncope frequently results in more protracted symptoms of fatigue, nausea, and somnolence from minutes to hours.24,25 Prolonged fatigue after the episode often hours in duration is more typically vasova ...
... tachycardia is generally associated with relatively rapid recovery of mentation whereas vasovagal syncope frequently results in more protracted symptoms of fatigue, nausea, and somnolence from minutes to hours.24,25 Prolonged fatigue after the episode often hours in duration is more typically vasova ...
MEANS ECG Physicians` Manual
... 1.3 Parameter extraction After the onset and end points of P, QRS and T waves have been established, the relevant parameters can be measured to provide the input for the diagnostic logic. Besides amplitudes and durations, other measurements such as surface areas under the signal are derived. Most me ...
... 1.3 Parameter extraction After the onset and end points of P, QRS and T waves have been established, the relevant parameters can be measured to provide the input for the diagnostic logic. Besides amplitudes and durations, other measurements such as surface areas under the signal are derived. Most me ...
Atrial Remodeling and Atrial Fibrillation
... vagal effects: Acetylcholine released from vagal nerve endings activates IKACh, which causes APD abbreviation and cell-membrane hyperpolarization. Increased vagal activity strongly promotes AF by stabilizing atrial reentrant rotors,41 and clinical AF often begins under vagotonic conditions.42 ATR al ...
... vagal effects: Acetylcholine released from vagal nerve endings activates IKACh, which causes APD abbreviation and cell-membrane hyperpolarization. Increased vagal activity strongly promotes AF by stabilizing atrial reentrant rotors,41 and clinical AF often begins under vagotonic conditions.42 ATR al ...
Chapter 35 PP
... Acute Myocardial Infarction cont’d Pathophysiology Begins with occlusion of a coronary artery Over 4 to 6 hours, ischemia, injury, infarction develop Ischemia results from a lack of blood and oxygen to a ...
... Acute Myocardial Infarction cont’d Pathophysiology Begins with occlusion of a coronary artery Over 4 to 6 hours, ischemia, injury, infarction develop Ischemia results from a lack of blood and oxygen to a ...
Spotlight on atrial fibrillation—the `complete arrhythmia`
... Gaspo et al. [44]. Bosch et al. did not find evidence for decreased INa in atrial myocytes of patients with AF [45]—in conjuction with the prior report [44], the results of Yagi et al. suggest either that there are significant species differences in the response of INa to atrial tachycardia or that ...
... Gaspo et al. [44]. Bosch et al. did not find evidence for decreased INa in atrial myocytes of patients with AF [45]—in conjuction with the prior report [44], the results of Yagi et al. suggest either that there are significant species differences in the response of INa to atrial tachycardia or that ...
Student Study Outline Ch15
... _________________________________________________________________ . (Outcome 15.2, 15.3) 5. The inner layer is the ___________________________ . (Outcome 15.2, 15.3) 6. The endocardium consists of ______________________ _________________________________________________________________ . (Outcome 15 ...
... _________________________________________________________________ . (Outcome 15.2, 15.3) 5. The inner layer is the ___________________________ . (Outcome 15.2, 15.3) 6. The endocardium consists of ______________________ _________________________________________________________________ . (Outcome 15 ...
Electronic Control Device Research Index As of July 14, 2008
... required is about 100–130 times that which the TASER X26 delivers. The TASER M26 safety margin was calculated at a range of 118-153:1. For the delivery of “continuous” current, the safety margin is 74:1-89:1. A study at the University of Missouri, Columbia, determined the cardiac safety margin of th ...
... required is about 100–130 times that which the TASER X26 delivers. The TASER M26 safety margin was calculated at a range of 118-153:1. For the delivery of “continuous” current, the safety margin is 74:1-89:1. A study at the University of Missouri, Columbia, determined the cardiac safety margin of th ...
070199 Prevalence and Clinical Outcome of Mitral
... ITRAL-VALVE prolapse has been described as a common disorder, with prevalence estimates generally ranging from 5 to 15 percent and up to 35 percent in some studies.1-7 In addition, mitral-valve prolapse has often been portrayed as a disease with frequent and serious complications, including stroke, ...
... ITRAL-VALVE prolapse has been described as a common disorder, with prevalence estimates generally ranging from 5 to 15 percent and up to 35 percent in some studies.1-7 In addition, mitral-valve prolapse has often been portrayed as a disease with frequent and serious complications, including stroke, ...
2014 AHA/ACC/HRS Guideline for the Management of - Med-IQ
... Journal of the American College of Cardiology (2014), doi: 10.1016/j.jacc.2014.03.022. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, ty ...
... Journal of the American College of Cardiology (2014), doi: 10.1016/j.jacc.2014.03.022. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, ty ...
Task Force Report Guidelines on management (diagnosis and treatment) of syncope*
... short-lasting severe cerebral hypoxia in adolescents induced by an instantaneous deep fall in systemic pressure using the ‘mess trick’, syncope occurred in all without any premonitory symptoms, and myoclonic jerks were present in 90%; the syncope duration averaged 12 s (range 5–22)[2]. However, rare ...
... short-lasting severe cerebral hypoxia in adolescents induced by an instantaneous deep fall in systemic pressure using the ‘mess trick’, syncope occurred in all without any premonitory symptoms, and myoclonic jerks were present in 90%; the syncope duration averaged 12 s (range 5–22)[2]. However, rare ...
2014 AHA/ACC/HRS Guideline for the Management of - GT
... CM, Yancy CW, 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation, Journal of the American College of Cardiology (2014), doi: 10.1016/j.jacc.2014.03.022. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers ...
... CM, Yancy CW, 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation, Journal of the American College of Cardiology (2014), doi: 10.1016/j.jacc.2014.03.022. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers ...
Accepted Manuscript
... CM, Yancy CW, 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation, Journal of the American College of Cardiology (2014), doi: 10.1016/j.jacc.2014.03.022. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers ...
... CM, Yancy CW, 2014 AHA/ACC/HRS Guideline for the Management of Patients With Atrial Fibrillation, Journal of the American College of Cardiology (2014), doi: 10.1016/j.jacc.2014.03.022. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers ...
Left Ventricular Septal and Left Ventricular Apical Pacing
... asynchronous activation and reduced left ventricular (LV) pump function. We investigated to what extent alternate RV (septum) and LV (septum, apex) pacing sites improve LV electric activation, mechanics, hemodynamic performance, and efficiency over 4 months of pacing. Methods and Results—After AV no ...
... asynchronous activation and reduced left ventricular (LV) pump function. We investigated to what extent alternate RV (septum) and LV (septum, apex) pacing sites improve LV electric activation, mechanics, hemodynamic performance, and efficiency over 4 months of pacing. Methods and Results—After AV no ...
Noninvasive Pacing
... rudimentary technology, noninvasive pacing was successfully used for the treatment of Stokes-Adams attacks associated with heart block.2 The theory behind noninvasive pacing was if a strong electrical current were applied to the chest, a small portion would reach the heart stimulating it to depolari ...
... rudimentary technology, noninvasive pacing was successfully used for the treatment of Stokes-Adams attacks associated with heart block.2 The theory behind noninvasive pacing was if a strong electrical current were applied to the chest, a small portion would reach the heart stimulating it to depolari ...
Cardiological Society of India
... angiographically proven coronary artery disease (CAD) in 128 patients with a mean age of 56.4±9.1 years (116 males, 12 females). There were 36 (28%) diabetic, 46 (36%) hypertensive, 30 (23%) smoker and 16 (13%), with a positive family history of CAD. The mean triglyceride, total cholesterol, high-de ...
... angiographically proven coronary artery disease (CAD) in 128 patients with a mean age of 56.4±9.1 years (116 males, 12 females). There were 36 (28%) diabetic, 46 (36%) hypertensive, 30 (23%) smoker and 16 (13%), with a positive family history of CAD. The mean triglyceride, total cholesterol, high-de ...
Noninvasive Pacing
... rudimentary technology, noninvasive pacing was successfully used for the treatment of Stokes-Adams attacks associated with heart block.2 The theory behind noninvasive pacing was if a strong electrical current were applied to the chest, a small portion would reach the heart stimulating it to depolari ...
... rudimentary technology, noninvasive pacing was successfully used for the treatment of Stokes-Adams attacks associated with heart block.2 The theory behind noninvasive pacing was if a strong electrical current were applied to the chest, a small portion would reach the heart stimulating it to depolari ...
Coupling interval from slow to tachycardiac pacing - AJP
... connector was secured at the mitral annulus. LV pressure was measured with a miniature pressure gauge (model P-7, Konigsberg Instruments; Pasadena, CA) inside the apical end of the balloon and processed with a direct current strain amplifier. The balloon, primed with water without air bubbles, was c ...
... connector was secured at the mitral annulus. LV pressure was measured with a miniature pressure gauge (model P-7, Konigsberg Instruments; Pasadena, CA) inside the apical end of the balloon and processed with a direct current strain amplifier. The balloon, primed with water without air bubbles, was c ...
Temporary epicardial pacing after cardiac surgery
... Epicardial pacing has evolved considerably from simple single chamber systems with very few adjustable parameters, to complex dual chamber systems that incorporate most of the functions of permanent pacemakers. Dual chamber pacing in particular produces many technical challenges that are not immedia ...
... Epicardial pacing has evolved considerably from simple single chamber systems with very few adjustable parameters, to complex dual chamber systems that incorporate most of the functions of permanent pacemakers. Dual chamber pacing in particular produces many technical challenges that are not immedia ...
medics.cc
... It reaches the AV node and the accessory bundle Conduction is delayed as usual by the in-built delay in the AV node However, the accessory ...
... It reaches the AV node and the accessory bundle Conduction is delayed as usual by the in-built delay in the AV node However, the accessory ...
The Sarcoplasmic Reticulum and the Evolution of the Vertebrate Heart
... Changes in the rate of SR Ca2⫹ cycling and the magnitude of SR Ca2⫹ release are key mechanisms by which the rate and force of cardiac contraction are altered. The indispensable role of the SR in mammalian species can be appreciated by the failure or reduction in cardiomyocyte contraction and relaxat ...
... Changes in the rate of SR Ca2⫹ cycling and the magnitude of SR Ca2⫹ release are key mechanisms by which the rate and force of cardiac contraction are altered. The indispensable role of the SR in mammalian species can be appreciated by the failure or reduction in cardiomyocyte contraction and relaxat ...
The Seventh Annual Meeting of the European Association of Echocardiography,
... New insights into right-ventricular function More insight into myocardial contrast echo Preclinical diagnosis of myocardial disease: new indications for tissue Doppler Valvular heart disease Resynchronisation in heart failure Echo quantification of left atrial function Young Investigator Awards Autho ...
... New insights into right-ventricular function More insight into myocardial contrast echo Preclinical diagnosis of myocardial disease: new indications for tissue Doppler Valvular heart disease Resynchronisation in heart failure Echo quantification of left atrial function Young Investigator Awards Autho ...
Magnesium - WordPress.com
... cardiovascular mortality by 50 percent. Prior research has determined that low magnesium levels are the best predictor of heart disease, contrary to the traditional belief that cholesterol or saturated fats play the biggest role. In a cohort of studies spanning the past 40 years, scientists have fou ...
... cardiovascular mortality by 50 percent. Prior research has determined that low magnesium levels are the best predictor of heart disease, contrary to the traditional belief that cholesterol or saturated fats play the biggest role. In a cohort of studies spanning the past 40 years, scientists have fou ...
1 - Circulation Research
... • The effect of electric currents upon cardiac activity has attracted increasing interest in connection with electrical defibrillation of the heart. In many cases resuscitation depends largely upon cardiac massage and ventricular defibrillation, whether the chest is open or closed.1"12 Although defi ...
... • The effect of electric currents upon cardiac activity has attracted increasing interest in connection with electrical defibrillation of the heart. In many cases resuscitation depends largely upon cardiac massage and ventricular defibrillation, whether the chest is open or closed.1"12 Although defi ...
atrial fibrillation
... Atrial fibrillation is typically seen in patients who have common cardiovascular diseases such as hypertension and heart failure or who have lifestyle risk factors such as alcohol and or obesity. It is a significant cause of morbidity and mortality, the presence of atrial fibrillation increases the ...
... Atrial fibrillation is typically seen in patients who have common cardiovascular diseases such as hypertension and heart failure or who have lifestyle risk factors such as alcohol and or obesity. It is a significant cause of morbidity and mortality, the presence of atrial fibrillation increases the ...
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.