Left ventricular preload reserve in preterm infants with patent ductus
... (LVEDV/BW)+0-12, r=0-87, p<0001; full- LVEDV by both birth weight and body length term infants: (stroke volume/BW)=0 67 instead of body surface area usually used in (LVEDV/BW)-0 11, r=088, p<0 001. older children, because it is difficult to measure Similarly, there was a linear correlation accuratel ...
... (LVEDV/BW)+0-12, r=0-87, p<0001; full- LVEDV by both birth weight and body length term infants: (stroke volume/BW)=0 67 instead of body surface area usually used in (LVEDV/BW)-0 11, r=088, p<0 001. older children, because it is difficult to measure Similarly, there was a linear correlation accuratel ...
Nature of the Gap Phenomenon in Man
... three patients during diagnostic cardiac catheterization in the supine, postabsorptive, nonsedated state. Informed consent was obtained from all patients. His bundle electrograms were recorded using previously described techniques (7). A bipolar electrode catheter was percutaneously introduced into ...
... three patients during diagnostic cardiac catheterization in the supine, postabsorptive, nonsedated state. Informed consent was obtained from all patients. His bundle electrograms were recorded using previously described techniques (7). A bipolar electrode catheter was percutaneously introduced into ...
Feasibility and effect of para-right bundle branch pacing in patients
... Background: Chronic right ventricular apex (RVA) pacing can induce negative clinical effects. The aim of the present study was to compare RVA pacing with para-right bundle branch (para-RBB) pacing in terms of electrocardiogram (ECG) and echocardiographic (ECHO) features. Methods: Forty-one consecuti ...
... Background: Chronic right ventricular apex (RVA) pacing can induce negative clinical effects. The aim of the present study was to compare RVA pacing with para-right bundle branch (para-RBB) pacing in terms of electrocardiogram (ECG) and echocardiographic (ECHO) features. Methods: Forty-one consecuti ...
Modelling cardiac mechanical properties in three
... pressure{volume relation and information on regional wall geometry. While this approach can yield some information about the overall sti¬ness of the chamber, material properties identi ed from these global measurements are not useful for studying the regional mechanics of the myocardium or for rela ...
... pressure{volume relation and information on regional wall geometry. While this approach can yield some information about the overall sti¬ness of the chamber, material properties identi ed from these global measurements are not useful for studying the regional mechanics of the myocardium or for rela ...
Accepted Manuscript
... *Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry and other entities may apply; see Appendix 1 for recusal information. †ACC/AHA Representative. ‡Heart Rhythm Society Representative. §ACC/AHA Task Force on Perform ...
... *Writing committee members are required to recuse themselves from voting on sections to which their specific relationships with industry and other entities may apply; see Appendix 1 for recusal information. †ACC/AHA Representative. ‡Heart Rhythm Society Representative. §ACC/AHA Task Force on Perform ...
Cardiac - JRC-DMS
... Section I: Anatomy and Physiology of the Heart................................................................................. 3 Section II: Basic Embryology ................................................................................................................ 8 Section III: The Echocardi ...
... Section I: Anatomy and Physiology of the Heart................................................................................. 3 Section II: Basic Embryology ................................................................................................................ 8 Section III: The Echocardi ...
OSM enhances angiogenesis and improves ... infarction
... followed by a biotinylated horse antigoat secondary antibody ( Vector Laboratories). The reaction ...
... followed by a biotinylated horse antigoat secondary antibody ( Vector Laboratories). The reaction ...
Brief pressure overload of the left ventricle reduces myocardial
... No anti-arrhythmic agents were given at any time. The arterial pressure, heart rate, electrocardiography, and the left ventricular pressure were recorded simultaneously and continuously throughout the experiments, including baseline (before treatment), treatment period, 40-minute coronary artery occ ...
... No anti-arrhythmic agents were given at any time. The arterial pressure, heart rate, electrocardiography, and the left ventricular pressure were recorded simultaneously and continuously throughout the experiments, including baseline (before treatment), treatment period, 40-minute coronary artery occ ...
Isolated Heart Perfusion Systems
... included in the standard system (Aortic Pressure and LVP). Most researchers will also want to operate in a constant pressure perfusion mode and measure coronary flow, which is a simple addition to the basic system. ...
... included in the standard system (Aortic Pressure and LVP). Most researchers will also want to operate in a constant pressure perfusion mode and measure coronary flow, which is a simple addition to the basic system. ...
Atrial natriuretic polypeptide is removed by the lungs and released
... After the procedure was explained, written informed consent was obtained from each patient and his or her family. This procedure and study are in compliance with the human studies guidelines of our institutioa and have been approved by the ethical corn ttee at our institution. Cardiic catbe~r~tio~. ...
... After the procedure was explained, written informed consent was obtained from each patient and his or her family. This procedure and study are in compliance with the human studies guidelines of our institutioa and have been approved by the ethical corn ttee at our institution. Cardiic catbe~r~tio~. ...
Author`s Accepted Manuscript - HRS
... 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, typesetting, and review of the resulting galley proof before it is published in its final ...
... 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, typesetting, and review of the resulting galley proof before it is published in its final ...
Improved Left Ventricular Relaxation During Short
... index during pacing from the right ventricular outflow tract at three pacing rates (85 beats/min, 100 beats/min, and 120 beats/min). However, these studies had three significant limitations: (1) in both studies,16,17 only ventricular pacing was evaluated; (2) although the hemodynamic results of pac ...
... index during pacing from the right ventricular outflow tract at three pacing rates (85 beats/min, 100 beats/min, and 120 beats/min). However, these studies had three significant limitations: (1) in both studies,16,17 only ventricular pacing was evaluated; (2) although the hemodynamic results of pac ...
Left ventricular twist and untwist rate provide reliable measures of
... Proper electrode position was confirmed by ensuring that volume waveforms were obtained from each individual pair of electrodes on the catheter. LV volume was calculated by injecting a hypertonic saline (0.2 g NaCl/mL, 2 mL) into the right atrium to obtain a constant offset volume (Vc). We measured ...
... Proper electrode position was confirmed by ensuring that volume waveforms were obtained from each individual pair of electrodes on the catheter. LV volume was calculated by injecting a hypertonic saline (0.2 g NaCl/mL, 2 mL) into the right atrium to obtain a constant offset volume (Vc). We measured ...
Personalized management of atrial fibrillation
... should be considered in patients who are currently symptomatic.29,39,40 Symptom assessment will need further review over time as symptoms will vary, and simple scores (e.g. EHRA score) have been proposed for this assessment.39,41 Depending on the degree of symptoms and patient preference, an initial ...
... should be considered in patients who are currently symptomatic.29,39,40 Symptom assessment will need further review over time as symptoms will vary, and simple scores (e.g. EHRA score) have been proposed for this assessment.39,41 Depending on the degree of symptoms and patient preference, an initial ...
Multimodality Imaging of Left Circumflex Artery to Coronary Sinus
... system to detect any enlarged fistula (13). It allows systematic evaluation of the aorta, pulmonary vessels, cardiac chamber and ventriculoatrial connection as well as evaluation of aneurysmal dilatation or thrombus formation. In addition, CT via volume rendering enables 3-dimensional CT data evalua ...
... system to detect any enlarged fistula (13). It allows systematic evaluation of the aorta, pulmonary vessels, cardiac chamber and ventriculoatrial connection as well as evaluation of aneurysmal dilatation or thrombus formation. In addition, CT via volume rendering enables 3-dimensional CT data evalua ...
Anatomy of the Atrioventricular Conduction System in
... bundles were situated along the lower rims of ventricular septal defects. Kirklin and coauthors,1 Lillehei,2 and Rodriguez and Wofford9 concluded from their surgical experiences that the bundle is situated at or near the posterior-inferior margin of the defect when the defect is inferior to the cris ...
... bundles were situated along the lower rims of ventricular septal defects. Kirklin and coauthors,1 Lillehei,2 and Rodriguez and Wofford9 concluded from their surgical experiences that the bundle is situated at or near the posterior-inferior margin of the defect when the defect is inferior to the cris ...
Malignant Mitral Valve Prolapse - ORBi
... identify features related with stretch-induced scar/fibrosis and arrhythmic MVP, Perazzolo Marra et al,11 in this issue of Circulation: Cardiovascular Imaging, performed a morphological assessment of the mitral valve with a particular focus on mitral annular disjunction (MAD). They studied 2 distinc ...
... identify features related with stretch-induced scar/fibrosis and arrhythmic MVP, Perazzolo Marra et al,11 in this issue of Circulation: Cardiovascular Imaging, performed a morphological assessment of the mitral valve with a particular focus on mitral annular disjunction (MAD). They studied 2 distinc ...
47 an analysis of control of the ventricle of the mollusc mercenaria
... frequency of beats were maximal at a Ca2+ concentration around 9mmol l21. Concentrations of extracellular Ca2+ greater than 18mmol l21 inhibited beating and caused a slight membrane depolarization. The membrane became increasingly depolarized as the concentration of extracellular Ca2+ was raised fro ...
... frequency of beats were maximal at a Ca2+ concentration around 9mmol l21. Concentrations of extracellular Ca2+ greater than 18mmol l21 inhibited beating and caused a slight membrane depolarization. The membrane became increasingly depolarized as the concentration of extracellular Ca2+ was raised fro ...
Community AED Toolkit Public Access to Defibrillation
... the upper chambers or atria contract. As they do, the blood inside them is squeezed out into the lower chambers of the heart – the ventricles. Meanwhile the electrical signal that made the atria contract has reached the AV (atrioventricular) node, in the lower part of the right atrium. The AV node i ...
... the upper chambers or atria contract. As they do, the blood inside them is squeezed out into the lower chambers of the heart – the ventricles. Meanwhile the electrical signal that made the atria contract has reached the AV (atrioventricular) node, in the lower part of the right atrium. The AV node i ...
Extracorporeal Membrane Oxygenation for Cardiac Failure
... provide a list of sources of the best evidence on the topic that CADTH could identify using all reasonable efforts within the time allowed. Rapid responses should be considered along with other types of information and health care considerations. The information included in this response is not inte ...
... provide a list of sources of the best evidence on the topic that CADTH could identify using all reasonable efforts within the time allowed. Rapid responses should be considered along with other types of information and health care considerations. The information included in this response is not inte ...
Haemodynamic and structural correlates of the first and
... the RHC. LV ejection fraction, end-diastolic and endsystolic volumes were calculated using the biplane method of disc summation and indexed to BSA.8 Semiquantitative and qualitative assessment of RV structure and function was performed following review of standard 2D acoustic windows that included R ...
... the RHC. LV ejection fraction, end-diastolic and endsystolic volumes were calculated using the biplane method of disc summation and indexed to BSA.8 Semiquantitative and qualitative assessment of RV structure and function was performed following review of standard 2D acoustic windows that included R ...
Chapter 10 Drug differences between ACE-inhibitors in experimental settings and clinical practice.
... in a dose-dependent manner by increasing stroke volume. However, captopril treatment started from 1 to 21 days after infarction not only failed to improve ventricular function but also might have caused deterioration. These findings, and many other results, led to ...
... in a dose-dependent manner by increasing stroke volume. However, captopril treatment started from 1 to 21 days after infarction not only failed to improve ventricular function but also might have caused deterioration. These findings, and many other results, led to ...
and Cavity Size: An Analysis of 1500 Human Hearts
... apply to the clinical relationship between hypertrophy and dilatation. In the experimental animal, the process for increased DNA synthesis appears to be activated within 48 hours,2 S which implies that there may be very little lag time between dilatation and hypertrophy as responses to load. We chos ...
... apply to the clinical relationship between hypertrophy and dilatation. In the experimental animal, the process for increased DNA synthesis appears to be activated within 48 hours,2 S which implies that there may be very little lag time between dilatation and hypertrophy as responses to load. We chos ...
Three-dimensional transmural organization of perimysial collagen in
... extended tissue volumes on arbitrary planes. To characterize the transmural variation of structural parameters, it was necessary to define a transmural axis, normal to the epicardial surface and extending to the origin of papillary muscle or endocardial trabeculae. The transmural variation of the fi ...
... extended tissue volumes on arbitrary planes. To characterize the transmural variation of structural parameters, it was necessary to define a transmural axis, normal to the epicardial surface and extending to the origin of papillary muscle or endocardial trabeculae. The transmural variation of the fi ...
Heart rate variability as a marker of sleepiness in sleep disordered
... anticipate sleep onset in SDB patients and, therefore, detect patients with and without ...
... anticipate sleep onset in SDB patients and, therefore, detect patients with and without ...
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.