8/09 LV Dyssnchrony and CRT
... Regional variance of strain (A) cannot differentiate identical variance of time to peak contraction between segments with delayed contraction clustered in 1 portion of the left ventricular wall (A, top), versus dispersion of delay through the heart (A, bottom); only the former displays dyssynchrony. ...
... Regional variance of strain (A) cannot differentiate identical variance of time to peak contraction between segments with delayed contraction clustered in 1 portion of the left ventricular wall (A, top), versus dispersion of delay through the heart (A, bottom); only the former displays dyssynchrony. ...
document
... • Acute R sided failure – Causes? – Would you expect to see any change to the R ventricle? ...
... • Acute R sided failure – Causes? – Would you expect to see any change to the R ventricle? ...
Idiopathic ventricular tachycardia in children
... recurred after a short time. One complication occurred in patient L.K. after RF: complete right bundle branch block (RBBB) followed the procedure. This 17-yearold athlete boy has sustained IVT (Fig. 2), which trigger was physical activity. Electrophysiological study revealed that origin of tachycard ...
... recurred after a short time. One complication occurred in patient L.K. after RF: complete right bundle branch block (RBBB) followed the procedure. This 17-yearold athlete boy has sustained IVT (Fig. 2), which trigger was physical activity. Electrophysiological study revealed that origin of tachycard ...
Full Text - Digital Access to Scholarship at Harvard
... with glass bottoms for proper cell attachment. The storage solution was continuously rinsed with normal Tyrode’s solution warmed at 36°C before recording. Patch-clamp recordings of mouse SAN cells The basal extracellular Tyrode’s solution used in all recordings contained (in mM): 140.0 NaCl, 5.4 KC ...
... with glass bottoms for proper cell attachment. The storage solution was continuously rinsed with normal Tyrode’s solution warmed at 36°C before recording. Patch-clamp recordings of mouse SAN cells The basal extracellular Tyrode’s solution used in all recordings contained (in mM): 140.0 NaCl, 5.4 KC ...
Coronary pressure-function and steady-state pressure
... Other studies have demonstrated that regional oxygen consumption decreases continuously as coronary pressure is reduced despite constant hemodynamic determinants of oxygen consumption. 31316 The potential effects of these changes on endocardial flow or a sensitive index of endocardia] function have ...
... Other studies have demonstrated that regional oxygen consumption decreases continuously as coronary pressure is reduced despite constant hemodynamic determinants of oxygen consumption. 31316 The potential effects of these changes on endocardial flow or a sensitive index of endocardia] function have ...
Apple - Sodium Reduction and CVD - Circulation 2011
... high and is escalating.2,3 The direct and indirect costs of these conditions are staggering, over $400 billion just for cardiovascular disease (CVD) in 2009.1,4 The human consequences are likewise enormous. The relation between BP and adverse health outcomes is direct and progressive with no evidenc ...
... high and is escalating.2,3 The direct and indirect costs of these conditions are staggering, over $400 billion just for cardiovascular disease (CVD) in 2009.1,4 The human consequences are likewise enormous. The relation between BP and adverse health outcomes is direct and progressive with no evidenc ...
Electroanatomic Mapping System - European Journal of Medical
... resonance tomography [12]. This additional functionality is often referred to as image fusion [13]. In this context, achieving electrically continuous, transmural lesions in a beating heart is challenging and requires a reliable three-dimensional (3D) navigation, in order to avoid complications (AV ...
... resonance tomography [12]. This additional functionality is often referred to as image fusion [13]. In this context, achieving electrically continuous, transmural lesions in a beating heart is challenging and requires a reliable three-dimensional (3D) navigation, in order to avoid complications (AV ...
Connexin 43 Expression in Human Hypertrophied Heart Due to
... Mechanical stress during left ventricular pressure overload is one of the most potent stimuli leading to left ventricular hypertrophy (LVH) and is associated with electro-mechanical remodeling (De Mello 1999, Dupont et al. 2001, Peters et al. 1997, Peters and Wit 2000, Sepp et al. 1996, Teunissen et ...
... Mechanical stress during left ventricular pressure overload is one of the most potent stimuli leading to left ventricular hypertrophy (LVH) and is associated with electro-mechanical remodeling (De Mello 1999, Dupont et al. 2001, Peters et al. 1997, Peters and Wit 2000, Sepp et al. 1996, Teunissen et ...
Reconstruction and Visualization of Fiber and
... Additionally, in the heart the fibers are organized Eigenvalue decomposition of D gives the eigenval- in layers (sheets) separated physically. This makes ues λ’s with λ1 ≥ λ2 ≥ λ3 . Thus, the first (the the diffusion smaller in the normal direction of the largest) eigenvector gives the main directio ...
... Additionally, in the heart the fibers are organized Eigenvalue decomposition of D gives the eigenval- in layers (sheets) separated physically. This makes ues λ’s with λ1 ≥ λ2 ≥ λ3 . Thus, the first (the the diffusion smaller in the normal direction of the largest) eigenvector gives the main directio ...
S0735109712021377_mmc1
... For each source, the catheter was maneuvered to the electrode site overlying the source identified by fluoroscopy or digital atrial maps. Radiofrequency applications for FIRM ablation were made for 15 to 30 s at any given location, moving the catheter within the area indicated by maps to represent ...
... For each source, the catheter was maneuvered to the electrode site overlying the source identified by fluoroscopy or digital atrial maps. Radiofrequency applications for FIRM ablation were made for 15 to 30 s at any given location, moving the catheter within the area indicated by maps to represent ...
Heart failure – biomarker effect and influence on quality of life.
... responders the within group analysis showed improvement in four domains compared to the non-responders that improved in one domain; however there were no significant differences between the two groups. There were improvements in HRQoL in all four groups (Paper III). Age did not influence outcome but ...
... responders the within group analysis showed improvement in four domains compared to the non-responders that improved in one domain; however there were no significant differences between the two groups. There were improvements in HRQoL in all four groups (Paper III). Age did not influence outcome but ...
Heart Failure: A Randomized Trial and Peripheral Resistance in
... Context Exercise training in patients with chronic heart failure improves work capacity by enhancing endothelial function and skeletal muscle aerobic metabolism, but effects on central hemodynamic function are not well established. Objective To evaluate the effects of exercise training on left ventr ...
... Context Exercise training in patients with chronic heart failure improves work capacity by enhancing endothelial function and skeletal muscle aerobic metabolism, but effects on central hemodynamic function are not well established. Objective To evaluate the effects of exercise training on left ventr ...
Titin isoform switching is a major cardiac adaptive response in
... no significant sex difference was found in titin and collagen expression and that no age dependence was detected either (within the available age range). Tissues sampled from active bears were collected during June, July, or August. Tissues samples from hibernating bears were collected in January or ...
... no significant sex difference was found in titin and collagen expression and that no age dependence was detected either (within the available age range). Tissues sampled from active bears were collected during June, July, or August. Tissues samples from hibernating bears were collected in January or ...
Effects of blood pressure lowering with amlodipine
... cardiovascular risk factors, including age, male sex, race, hyperlipidaemia, smoking, diabetes mellitus, left ventricular hypertrophy, plasma homocysteine, uric acid and fibrinogen [8,9]. Importantly, five prospective studies have now shown that increased carotid IMT is associated with greater risk ...
... cardiovascular risk factors, including age, male sex, race, hyperlipidaemia, smoking, diabetes mellitus, left ventricular hypertrophy, plasma homocysteine, uric acid and fibrinogen [8,9]. Importantly, five prospective studies have now shown that increased carotid IMT is associated with greater risk ...
Longitudinal strain of right ventricular free wall by 2
... In the present study, we demonstrated that PSS, PSI, TRPG and RVDd had significant correlations with MPAP and PVR, and multivariate logistic regression analysis identified PSS as the only independent predictor for MPAP ≥ 35 mmHg and PVR ≥ 400 dyne·sec·cm-5. Furthermore, ROC curve analysis showed tha ...
... In the present study, we demonstrated that PSS, PSI, TRPG and RVDd had significant correlations with MPAP and PVR, and multivariate logistic regression analysis identified PSS as the only independent predictor for MPAP ≥ 35 mmHg and PVR ≥ 400 dyne·sec·cm-5. Furthermore, ROC curve analysis showed tha ...
AHA Scientific Statement
... Electrode placement should be in a modified version of the Mason-Likar placement, with the arm leads at the lateral and superior corners of the sternum and the leg electrodes near the right and left inferior rib margins between the midclavicular and anterior axillary lines. In patients undergoing ex ...
... Electrode placement should be in a modified version of the Mason-Likar placement, with the arm leads at the lateral and superior corners of the sternum and the leg electrodes near the right and left inferior rib margins between the midclavicular and anterior axillary lines. In patients undergoing ex ...
Ventricular Tachycardia in a Patient with Repaired Tetralogy of Fallot
... Case Presentation and ECG Description A 22 year old male presented to the emergency department with malaise, nausea and vomiting after consuming alcohol. A 12 lead ECG (Figure 1a) revealed a regular, wide complex tachycardia (QRS duration 144 ms), ventricular rate 208 bpm, left bundle branch block m ...
... Case Presentation and ECG Description A 22 year old male presented to the emergency department with malaise, nausea and vomiting after consuming alcohol. A 12 lead ECG (Figure 1a) revealed a regular, wide complex tachycardia (QRS duration 144 ms), ventricular rate 208 bpm, left bundle branch block m ...
Cardiovascular magnetic resonance artefacts | SpringerLink
... the magnetisation settles into a steady dynamic equilibrium (known as steady-state) during the multiple shots (excitations) of the sequence. Two strategies are commonly employed to deal with the remaining transverse magnetisation at the end of each TR: the remaining transverse magnetisation can be s ...
... the magnetisation settles into a steady dynamic equilibrium (known as steady-state) during the multiple shots (excitations) of the sequence. Two strategies are commonly employed to deal with the remaining transverse magnetisation at the end of each TR: the remaining transverse magnetisation can be s ...
Regulation of Stroke Volume during Submaximal and Maximal
... formulas after correction for temperature and barometric pressure. Peak V02 was used as an objective index of aerobic work performance or cardiovascular reserve. To determine whether measurements of V02 during the 3rd minute of each exercise stage adequately represented steady state values, a separa ...
... formulas after correction for temperature and barometric pressure. Peak V02 was used as an objective index of aerobic work performance or cardiovascular reserve. To determine whether measurements of V02 during the 3rd minute of each exercise stage adequately represented steady state values, a separa ...
Invasive Hemodynamic Monitoring
... blood through the aortic valve, into the aorta, and then through the systemic circulation. The pulmonary capillary bed lies between the right and left heart. The capillary bed is a very compliant system with a high capacity to hold blood. Changes in this capacity can be detected through pressure cha ...
... blood through the aortic valve, into the aorta, and then through the systemic circulation. The pulmonary capillary bed lies between the right and left heart. The capillary bed is a very compliant system with a high capacity to hold blood. Changes in this capacity can be detected through pressure cha ...
Digitalis and Baroreceptor Reflexes in Man
... However, most of the studies we have mentioned have made use of doses of digitalis compounds that are greater (and often markedly so) than the doses used therapeutically. Most important, the only evidence on the effect of digitalis on baroreflexes in man are reports that digitalis may potentiate the ...
... However, most of the studies we have mentioned have made use of doses of digitalis compounds that are greater (and often markedly so) than the doses used therapeutically. Most important, the only evidence on the effect of digitalis on baroreflexes in man are reports that digitalis may potentiate 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.