Definitions for a Common Standard for 2D Speckle Tracking
... Task Force’) to communicate standard physical and mathematical definitions of various parameters commonly reported in myocardial deformation imaging. It is aimed primarily at the technical engineering community and also interested clinicians. The document is not intended to explore the wide range of ...
... Task Force’) to communicate standard physical and mathematical definitions of various parameters commonly reported in myocardial deformation imaging. It is aimed primarily at the technical engineering community and also interested clinicians. The document is not intended to explore the wide range of ...
2012 ACCF/AHA/HRS Focused Update of the 2008 Guidelines for
... The ACCF/AHA practice guidelines are intended to assist healthcare providers in clinical decision making by describing a range of generally acceptable approaches to the diagnosis, management, and prevention of specific diseases or conditions. The guidelines attempt to define practices that meet the ...
... The ACCF/AHA practice guidelines are intended to assist healthcare providers in clinical decision making by describing a range of generally acceptable approaches to the diagnosis, management, and prevention of specific diseases or conditions. The guidelines attempt to define practices that meet the ...
double superiorvenacava and its associated
... systemic cyanosisand may lead to clinical symptoms. ...
... systemic cyanosisand may lead to clinical symptoms. ...
Stable Angina and If Inhibition: New Insights and
... prevent subsequent events and to treat residual or recurrent ischemia. In addition, not all patients with chronic ischemia require revascularization. Medical treatment is still recommended as first-line strategy to control symptoms.2 β-Blockers, calcium channel blocking agents, and nitrates have bee ...
... prevent subsequent events and to treat residual or recurrent ischemia. In addition, not all patients with chronic ischemia require revascularization. Medical treatment is still recommended as first-line strategy to control symptoms.2 β-Blockers, calcium channel blocking agents, and nitrates have bee ...
Recommendations for the Evaluation of Left Ventricular Diastolic
... volume index 34 mL/m2 is an independent predictor of death, heart failure, atrial fibrillation, and ischemic stroke.12 However, one must recognize that dilated left atria may be seen in patients with bradycardia and 4-chamber enlargement, anemia and other high-output states, atrial flutter or fibri ...
... volume index 34 mL/m2 is an independent predictor of death, heart failure, atrial fibrillation, and ischemic stroke.12 However, one must recognize that dilated left atria may be seen in patients with bradycardia and 4-chamber enlargement, anemia and other high-output states, atrial flutter or fibri ...
Protecting the acute ischemic myocardium on top of reperfusion
... peritoneal lavage, which, although still invasive, should be easier to institute than any of the ...
... peritoneal lavage, which, although still invasive, should be easier to institute than any of the ...
Chapter_012_LO
... 1. Transmits recording over phone line to ECG data interpretation site 2. Recording interpreted by cardiologist a. Computer analysis may also be performed ...
... 1. Transmits recording over phone line to ECG data interpretation site 2. Recording interpreted by cardiologist a. Computer analysis may also be performed ...
Impair Efferent Sympathetic Responsiveness
... sympathetic neural stimulation after cardioversion-defibrillation. (Circulation. 1993;88:2661-2673.) KEY WoRDs * DC shock * electrodes * effective refractory period * autonomic neural function Implantable cardioverter-defibrillators using epicardial patch systems effectively cardiovert ventricular t ...
... sympathetic neural stimulation after cardioversion-defibrillation. (Circulation. 1993;88:2661-2673.) KEY WoRDs * DC shock * electrodes * effective refractory period * autonomic neural function Implantable cardioverter-defibrillators using epicardial patch systems effectively cardiovert ventricular t ...
The AV junction region of the heart: a comprehensive - AJP
... whole hearts, subsequent tissue blocks, and photomicrographs of serial sections of the same hearts was made. The first series of studies demonstrated that a specialized myocardial network joins the AV node (i.e., three atrionodal bundles and the proximal AV bundle in two different longitudinal plane ...
... whole hearts, subsequent tissue blocks, and photomicrographs of serial sections of the same hearts was made. The first series of studies demonstrated that a specialized myocardial network joins the AV node (i.e., three atrionodal bundles and the proximal AV bundle in two different longitudinal plane ...
Serum carnitine concentrations in patients with
... Cardiac catheterization Cardiac catheterization was performed in all the HCM patients by the percutaneous Seldinger technique. Baseline ventricular pressure was evaluated using an end-hole water-filled catheter before cine-angiography. A diagnosis of HOCM was established when a patient had a pressur ...
... Cardiac catheterization Cardiac catheterization was performed in all the HCM patients by the percutaneous Seldinger technique. Baseline ventricular pressure was evaluated using an end-hole water-filled catheter before cine-angiography. A diagnosis of HOCM was established when a patient had a pressur ...
Coronary Intervention of An anomalous Left Main Coronary Artery
... Anomalous origin of the left coronary artery from the right sinus of Valsalva is an uncommon malformation, accounting for 0.15% of cases in the series of Angelina, et al. [8] this anomaly is further subdivided in to 4 subtypes depending on the course it follows [1] The left main coronary artery cour ...
... Anomalous origin of the left coronary artery from the right sinus of Valsalva is an uncommon malformation, accounting for 0.15% of cases in the series of Angelina, et al. [8] this anomaly is further subdivided in to 4 subtypes depending on the course it follows [1] The left main coronary artery cour ...
Potent and Reversible Effects of ATI
... small right atrial incision as previously described (Jenkins and Belardinelli, 1988). The stimulus-to-atrium (S-A), atrium-to-His bundle (A-H), and His bundle-to-ventricle (H-V) intervals were used as indices of intra-atrial, AV nodal (proximal AV), and His Purkinje system (distal AV) conduction tim ...
... small right atrial incision as previously described (Jenkins and Belardinelli, 1988). The stimulus-to-atrium (S-A), atrium-to-His bundle (A-H), and His bundle-to-ventricle (H-V) intervals were used as indices of intra-atrial, AV nodal (proximal AV), and His Purkinje system (distal AV) conduction tim ...
Sonometric Study of the Normal Tricuspid Valve Annulus in Sheep
... dynamic changes during the cardiac cycle have been previously studied in sheep using sonomicrometry. The study aim was to analyze geometric changes of the normal tricuspid annulus in sheep using a similar methodology. This is most likely the first tricuspid valve study using high temporal resolution ...
... dynamic changes during the cardiac cycle have been previously studied in sheep using sonomicrometry. The study aim was to analyze geometric changes of the normal tricuspid annulus in sheep using a similar methodology. This is most likely the first tricuspid valve study using high temporal resolution ...
Geometry of Koch`s triangle
... All hearts were removed together with proximal portions of great vessels: the ascending aorta, the pulmonary trunk, the superior and the inferior vena cava (up to 1 cm of length in each case), and all pulmonary veins (up to the lung hilum). After dissection, all hearts were weighted and then fixed i ...
... All hearts were removed together with proximal portions of great vessels: the ascending aorta, the pulmonary trunk, the superior and the inferior vena cava (up to 1 cm of length in each case), and all pulmonary veins (up to the lung hilum). After dissection, all hearts were weighted and then fixed i ...
Caffeine and Cardiac Arrhythmias: A Review of the Evidence
... found that 200 mg of caffeine shortened the refractory periods of the right atrium, AV node, and right ventricle. Paradoxically, the effective refractory period of the left atrium increased with caffeine. Of note, there was an increase in sustained atrial arrhythmias in response to programmed atrial ...
... found that 200 mg of caffeine shortened the refractory periods of the right atrium, AV node, and right ventricle. Paradoxically, the effective refractory period of the left atrium increased with caffeine. Of note, there was an increase in sustained atrial arrhythmias in response to programmed atrial ...
Review article NATRIURETIC PEPTIDES IN CARDIOVASCULAR
... A peptide with the function of constricting the blood vessels was first discovered by Hickey et al. [11]. A few years later, the sequence of this peptide was determined [12]. Called endothelin (ET), it appeared to be identical in humans, dogs, rats and pigs. The activities of natriuretic peptides an ...
... A peptide with the function of constricting the blood vessels was first discovered by Hickey et al. [11]. A few years later, the sequence of this peptide was determined [12]. Called endothelin (ET), it appeared to be identical in humans, dogs, rats and pigs. The activities of natriuretic peptides an ...
Cardiac Action Potential
... Determinants of Cardiac Output (Cont.) Determinants of Heart Rate Influence by autonomic nervous system— release of norepinephrine increases rate Baroreceptors detect fall in blood pressure and transmit to CNS—parasympathetic system inhibition and cardia sympathetic nerve activation increase he ...
... Determinants of Cardiac Output (Cont.) Determinants of Heart Rate Influence by autonomic nervous system— release of norepinephrine increases rate Baroreceptors detect fall in blood pressure and transmit to CNS—parasympathetic system inhibition and cardia sympathetic nerve activation increase he ...
Venous Thromboembolism Increases the Risk of Atrial Fibrillation
... with VTE and subsequent atrial fibrillation, those with VTE only, those with atrial fibrillation only, and for those with neither VTE nor atrial fibrillation during follow-up. Among those with atrial fibrillation only, 55.7% were men, while of those with subsequent atrial fibrillation after a diagnosis o ...
... with VTE and subsequent atrial fibrillation, those with VTE only, those with atrial fibrillation only, and for those with neither VTE nor atrial fibrillation during follow-up. Among those with atrial fibrillation only, 55.7% were men, while of those with subsequent atrial fibrillation after a diagnosis o ...
Pericardial Fat Is Associated With Prevalent Atrial Fibrillation
... arrhythmias.27 Of the 80 patients with high interatrial fat, 20 had atrial arrhythmias, of which 7 had AF.27 More recently, Heyer et al29 have reported that of 75% of patients with lipomatous septal hypertrophy (21/28 patients) had increased pericardial fat by CT. Of these 21 patients, 13 had ECG ab ...
... arrhythmias.27 Of the 80 patients with high interatrial fat, 20 had atrial arrhythmias, of which 7 had AF.27 More recently, Heyer et al29 have reported that of 75% of patients with lipomatous septal hypertrophy (21/28 patients) had increased pericardial fat by CT. Of these 21 patients, 13 had ECG ab ...
Mechanisms for overestimating acute myocardial infarct size with
... placed in infarcted, salvaged, and remote myocardium as well as in the LV blood pool on T1 maps. Infarct was defined as areas that displayed enhancement on standard LGE images, based on the feature analysis and combined thresholding (FACT) computer algorithm, which has been validated by histopatholo ...
... placed in infarcted, salvaged, and remote myocardium as well as in the LV blood pool on T1 maps. Infarct was defined as areas that displayed enhancement on standard LGE images, based on the feature analysis and combined thresholding (FACT) computer algorithm, which has been validated by histopatholo ...
Impaired Glucose Transporter Activity in Pressure
... addition of 2-DG to the perfusate. C, Representative 2-DG uptake curve: perfusion of hearts (n53; mean6SEM) with 2-DG over 40 minutes followed by 35 minutes of wash-out with glucose- and insulin-containing buffer (change of solutions indicated by arrows). ...
... addition of 2-DG to the perfusate. C, Representative 2-DG uptake curve: perfusion of hearts (n53; mean6SEM) with 2-DG over 40 minutes followed by 35 minutes of wash-out with glucose- and insulin-containing buffer (change of solutions indicated by arrows). ...
The Effect of Right Ventricular Filling on the Pressure
... Small incisions were made in the pericardium over the right and left atrium. Both ventricles were vented and the atria opened. Coronary venous return then drained freely into a funnel and was returned to the femoral vein of the support dog. After the chordae tendinae had been cut, a thinwalled ballo ...
... Small incisions were made in the pericardium over the right and left atrium. Both ventricles were vented and the atria opened. Coronary venous return then drained freely into a funnel and was returned to the femoral vein of the support dog. After the chordae tendinae had been cut, a thinwalled ballo ...
Late Systolic Murmurs and Non-Ejection - Heart
... both late systolic murmurs and non-ejection clicks, and Group 4, 18 patients with either a late systolic murmur or a non-ejection click, or both, together with a "pathological" murmur (Table I). For purposes of this study, a " pathological" murmur is a diastolic murmur of mitral or aortic origin, an ...
... both late systolic murmurs and non-ejection clicks, and Group 4, 18 patients with either a late systolic murmur or a non-ejection click, or both, together with a "pathological" murmur (Table I). For purposes of this study, a " pathological" murmur is a diastolic murmur of mitral or aortic origin, an ...
Atrial Fibrillation in Children
... 5. Atrial fibrillation in neonates The diagnosis of atrial fibrillation in the neonate is simpler than in the fetus due to the convenience of direct access to the patient. A 12-lead electrocardiogram can obtained and diagnostic accuracy greatly increased. Rarely is a neonatal invasive electrophysiol ...
... 5. Atrial fibrillation in neonates The diagnosis of atrial fibrillation in the neonate is simpler than in the fetus due to the convenience of direct access to the patient. A 12-lead electrocardiogram can obtained and diagnostic accuracy greatly increased. Rarely is a neonatal invasive electrophysiol ...
Pericardial Disease: Etiology, Pathophysiology
... by the European Society of Cardiology (ESC)1 and reports of large series from centers to which many patients with pericardial disease are referred. Pericardial heart disease is much less common than heart disease, originating with primary disorders of the coronary arteries, the myocardium, or the ca ...
... by the European Society of Cardiology (ESC)1 and reports of large series from centers to which many patients with pericardial disease are referred. Pericardial heart disease is much less common than heart disease, originating with primary disorders of the coronary arteries, the myocardium, or the ca ...
Electrocardiography
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.