Chapter 3 HEART SOUND ANALYSIS - Estudo Geral
... basis of the periodic nature of heart sounds and physiologically inspired criteria. A small segment of uncontaminated heart sound exhibiting periodicity in time as well as in the time-frequency domain is first detected and applied as a reference signal in discriminating noise from the sound. For the ...
... basis of the periodic nature of heart sounds and physiologically inspired criteria. A small segment of uncontaminated heart sound exhibiting periodicity in time as well as in the time-frequency domain is first detected and applied as a reference signal in discriminating noise from the sound. For the ...
Differentiation of "AV Junctional Rhythms"
... His bundle region has been a subject of considerable debate. As many as five different pacemaker sites have been described in the A-V junction: coronary sinus ostium, the upper, middle, and lower A-V node,' and more recently, the His bundle.2 In ...
... His bundle region has been a subject of considerable debate. As many as five different pacemaker sites have been described in the A-V junction: coronary sinus ostium, the upper, middle, and lower A-V node,' and more recently, the His bundle.2 In ...
Permanent Pacemaker
... HR and AV synchrony using dual chamber AV sequential pacing. (Payne, 2011) First degree heart block rarely requires AV pacing unless it is associated with symptoms. o Pacemaker output (visible spike) may not always equate to myocardial capture and cardiac output. Electrical events without evidence o ...
... HR and AV synchrony using dual chamber AV sequential pacing. (Payne, 2011) First degree heart block rarely requires AV pacing unless it is associated with symptoms. o Pacemaker output (visible spike) may not always equate to myocardial capture and cardiac output. Electrical events without evidence o ...
nt-pro brain natriuretic peptide: new diagnostic tool for heart failure
... exudates who are treated with diuretics. Han et al (2) reported that 26 of the 28 misclassified heart-failure patients received diuretics before thoracentesis and had pleural fluid NT-proBNP levels of higher than 1,714 ...
... exudates who are treated with diuretics. Han et al (2) reported that 26 of the 28 misclassified heart-failure patients received diuretics before thoracentesis and had pleural fluid NT-proBNP levels of higher than 1,714 ...
a guideline for healthcare professionals from the American
... economic toll is staggering. Approximately 795 000 people in the United States have a stroke each year, of which about 610 000 are a first attack; and 6.4 million Americans are stroke survivors.1 Stroke is also estimated to result in 134 000 deaths annually and is the third leading cause of death in ...
... economic toll is staggering. Approximately 795 000 people in the United States have a stroke each year, of which about 610 000 are a first attack; and 6.4 million Americans are stroke survivors.1 Stroke is also estimated to result in 134 000 deaths annually and is the third leading cause of death in ...
1. Diseases and Conditions of the Circulatory System
... This workforce solution was partially financed through a $12,695,959 grant from the Department of Labor’s Employment and Training Administration. This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/l ...
... This workforce solution was partially financed through a $12,695,959 grant from the Department of Labor’s Employment and Training Administration. This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/l ...
Testing for B-type natriuretic peptide in the diagnosis
... TA B L E 1 Conditions associated with increased BNP levels Heart failure Left ventricular hypertrophy Cardiac inflammation (eg, myocarditis, cardiac allograft rejection) Arrhythmogenic right ventricle with reduced ejection fraction Kawasaki disease Primary pulmonary hypertension Pulmonary embolism ...
... TA B L E 1 Conditions associated with increased BNP levels Heart failure Left ventricular hypertrophy Cardiac inflammation (eg, myocarditis, cardiac allograft rejection) Arrhythmogenic right ventricle with reduced ejection fraction Kawasaki disease Primary pulmonary hypertension Pulmonary embolism ...
Print - Circulation Research
... study addresses the question of whether adenosine, produced in response to this stress, influences either the antigen-antibody-induced alterations in cardiac function or the release of histamine, which is known to be one of the important mediators of the anaphylactic reaction. Isolated hearts of pas ...
... study addresses the question of whether adenosine, produced in response to this stress, influences either the antigen-antibody-induced alterations in cardiac function or the release of histamine, which is known to be one of the important mediators of the anaphylactic reaction. Isolated hearts of pas ...
Indications by Appropriate Use Ratings
... Not Revascularized Obstructive CAD With Coronary Anatomy Not Amenable to Revascularization ...
... Not Revascularized Obstructive CAD With Coronary Anatomy Not Amenable to Revascularization ...
Anatomy of the Atrioventricular Conduction System in
... specimen could not be obtained.) The factors responsible for death in these cases were most often cardiac, either related to the congenital anomaly (most cases) or a complication of it (for example, one patient died of brain abscess secondary to subacute bacterial endocarditis). In a few instances, ...
... specimen could not be obtained.) The factors responsible for death in these cases were most often cardiac, either related to the congenital anomaly (most cases) or a complication of it (for example, one patient died of brain abscess secondary to subacute bacterial endocarditis). In a few instances, ...
effects of low-intensity exercise conditioning on blood pressure
... blood pressure (BP), heart rate (HR), rate-pressure-product (RPP) and cardiac autonomic function were examined in menopausal and post menopausal women with hypertension. Eligible participants (n=50) were counterbalanced to either the exercise group or the control group. Using a pretest-posttest desi ...
... blood pressure (BP), heart rate (HR), rate-pressure-product (RPP) and cardiac autonomic function were examined in menopausal and post menopausal women with hypertension. Eligible participants (n=50) were counterbalanced to either the exercise group or the control group. Using a pretest-posttest desi ...
Fulltext - Jultika
... Heart rate variability (HRV) is used in the assessment of cardiovascular health. However, often contradictory results have impeded the efficient use of HRV in clinical practice. HRV signals can contain artifacts leading to errors in the interpretation of HRV results. Various methods have been used f ...
... Heart rate variability (HRV) is used in the assessment of cardiovascular health. However, often contradictory results have impeded the efficient use of HRV in clinical practice. HRV signals can contain artifacts leading to errors in the interpretation of HRV results. Various methods have been used f ...
Reading: Professional Development - Syncope
... us? Yes, a cardiac syncope carries a much higher risk to the patient than vasovagal or situational syncope. Knowing that our patient suffered a cardiac syncope should increase our vigilance and the sense of urgency. There is also a great sense of satisfaction in having a true understanding on what i ...
... us? Yes, a cardiac syncope carries a much higher risk to the patient than vasovagal or situational syncope. Knowing that our patient suffered a cardiac syncope should increase our vigilance and the sense of urgency. There is also a great sense of satisfaction in having a true understanding on what i ...
On the innervation of the heart, with special reference to the heart of
... ventricle without further description. In most of the experiments which I have made on the tortoise heart I have not used a clamp in order to hold the heart firm but have simply held the aorta in a suitable holder, so that in these cases any separation of the different parts of the heart is made by ...
... ventricle without further description. In most of the experiments which I have made on the tortoise heart I have not used a clamp in order to hold the heart firm but have simply held the aorta in a suitable holder, so that in these cases any separation of the different parts of the heart is made by ...
Age-related comorbidities that impact on wound healing
... • Age/ Gender/ Sex hormones: protein synthesis is lower; monocytes migrate later, inflammation persists longer. Estrogen can improve age-related impairment in healing in both men & women • Stress: diminishes inflammatory response and reduces the production of cytokines • Disease: presence of chronic ...
... • Age/ Gender/ Sex hormones: protein synthesis is lower; monocytes migrate later, inflammation persists longer. Estrogen can improve age-related impairment in healing in both men & women • Stress: diminishes inflammatory response and reduces the production of cytokines • Disease: presence of chronic ...
Acidosis slows electrical conduction through the atrio
... Relatively slow electrical conduction through the AVN normally ensures correct timing of atrial and ventricular contraction (Meijler and Janse, 1988). The AVN also plays a protective role in some abnormal cardiac rhythms while contributing to the generation of others. For example, during atrial fibr ...
... Relatively slow electrical conduction through the AVN normally ensures correct timing of atrial and ventricular contraction (Meijler and Janse, 1988). The AVN also plays a protective role in some abnormal cardiac rhythms while contributing to the generation of others. For example, during atrial fibr ...
Valsalva Sinus Aneurysms: Findings at CT and MR Imaging
... in 109 cases (62%), CT was performed in 36 cases (20%), and MR imaging was performed in 19 cases (11%). Although in most cases CT was performed to confirm echocardiographic findings, the use of CT to help diagnose Valsalva sinus aneurysms may become more common as it becomes increasingly popular in ...
... in 109 cases (62%), CT was performed in 36 cases (20%), and MR imaging was performed in 19 cases (11%). Although in most cases CT was performed to confirm echocardiographic findings, the use of CT to help diagnose Valsalva sinus aneurysms may become more common as it becomes increasingly popular in ...
AHA/ASA Guideline
... use of modern brain imaging, many patients with symptoms lasting ⬍24 hours are found to have an infarction. The most recent definition of stroke for clinical trials has required either symptoms lasting ⬎24 hours or imaging of an acute clinically relevant brain lesion in patients with rapidly vanishi ...
... use of modern brain imaging, many patients with symptoms lasting ⬍24 hours are found to have an infarction. The most recent definition of stroke for clinical trials has required either symptoms lasting ⬎24 hours or imaging of an acute clinically relevant brain lesion in patients with rapidly vanishi ...
Estimation of Heart-Surface Potentials Using Regularized Multipole
... equivalent sources, such as the familiar single dipole of vectorcardiography [1], multiple dipole sources [2], or multipole expansions [3] can successfully represent cardiac activity [4]. These equivalents, however, can be difficult to interpret. In contrast, heart-surface potentials are easy to inter ...
... equivalent sources, such as the familiar single dipole of vectorcardiography [1], multiple dipole sources [2], or multipole expansions [3] can successfully represent cardiac activity [4]. These equivalents, however, can be difficult to interpret. In contrast, heart-surface potentials are easy to inter ...
Factors affecting tolerance to digitalis
... digitalis. Both catecholamines and excessive doses of digitalis increase the temporal dispersion of excitability recovery and, thus, facilitate ventricular fibrillation. However, there is no convincing evidence that sympathetic stimulation induces ventricular tachycardia or fibrillation in patients ...
... digitalis. Both catecholamines and excessive doses of digitalis increase the temporal dispersion of excitability recovery and, thus, facilitate ventricular fibrillation. However, there is no convincing evidence that sympathetic stimulation induces ventricular tachycardia or fibrillation in patients ...
Atrial Fibrillation in Children
... Atrial Fibrillation - Basic Research and Clinical Applications ...
... Atrial Fibrillation - Basic Research and Clinical Applications ...
ASA: Guidelines for Prevention of Stroke in Patients With Ischemic
... use of modern brain imaging, many patients with symptoms lasting ⬍24 hours are found to have an infarction. The most recent definition of stroke for clinical trials has required either symptoms lasting ⬎24 hours or imaging of an acute clinically relevant brain lesion in patients with rapidly vanishi ...
... use of modern brain imaging, many patients with symptoms lasting ⬍24 hours are found to have an infarction. The most recent definition of stroke for clinical trials has required either symptoms lasting ⬎24 hours or imaging of an acute clinically relevant brain lesion in patients with rapidly vanishi ...
Guidelines for Prevention of Stroke in Patients With Ischemic Stroke
... use of modern brain imaging, many patients with symptoms lasting ⬍24 hours are found to have an infarction. The most recent definition of stroke for clinical trials has required either symptoms lasting ⬎24 hours or imaging of an acute clinically relevant brain lesion in patients with rapidly vanishi ...
... use of modern brain imaging, many patients with symptoms lasting ⬍24 hours are found to have an infarction. The most recent definition of stroke for clinical trials has required either symptoms lasting ⬎24 hours or imaging of an acute clinically relevant brain lesion in patients with rapidly vanishi ...
the left atrium in hypertension: a symbol of mortality and morbidity?
... proven. It is possible that antihypertensive drugs differ in their effects on left atrial size. For example, in a comparison of six antihypertensive agents as monotherapy in relation to the reduction of left atrial size in mild to moderate hypertension, hydrochlorthiazide was associated with the gre ...
... proven. It is possible that antihypertensive drugs differ in their effects on left atrial size. For example, in a comparison of six antihypertensive agents as monotherapy in relation to the reduction of left atrial size in mild to moderate hypertension, hydrochlorthiazide was associated with the gre ...
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.