Cardiac Alpha1-Adrenergic Receptors
... overexpression have no discernible cardiac phenotype (Adams et al., 1998; Sakata et al., 1998). Furthermore, a1-ARs differ from other Gq-coupled receptors in several important ways, including expression limited to myocytes within the heart (section II) and localization and signaling at the nucleus, ...
... overexpression have no discernible cardiac phenotype (Adams et al., 1998; Sakata et al., 1998). Furthermore, a1-ARs differ from other Gq-coupled receptors in several important ways, including expression limited to myocytes within the heart (section II) and localization and signaling at the nucleus, ...
Patient pacemaker information booklet
... A pacemaker consists of a pulse generator (pacemaker box), which sits under the skin in the upper chest, and either one or two electrode leads that sit inside the heart. The pacemaker box contains the power supply (battery), electronic circuit and specialised software and memory in order to monitor ...
... A pacemaker consists of a pulse generator (pacemaker box), which sits under the skin in the upper chest, and either one or two electrode leads that sit inside the heart. The pacemaker box contains the power supply (battery), electronic circuit and specialised software and memory in order to monitor ...
Swimming exercise reverses aging-related contractile abnormalities
... Background: The objective of this study was to examine the effect of swimming exercise on aging-related Ca2+ handling alterations and structural abnormalities of female rat heart. Methods: For this purpose, 4-month and 24-month old female rats were used and divided into three following groups: seden ...
... Background: The objective of this study was to examine the effect of swimming exercise on aging-related Ca2+ handling alterations and structural abnormalities of female rat heart. Methods: For this purpose, 4-month and 24-month old female rats were used and divided into three following groups: seden ...
Persistent left superior vena cava: a case report and review of
... congenital heart disease. Clin Radiol. 1986;37:1318. 5. J. Marshall. On the development of the great anterior veins in man and mammalia: including an account of certain remnants of fetal structure found in the adult, a comparative view of these great veins in the different mammalia, an analysis of t ...
... congenital heart disease. Clin Radiol. 1986;37:1318. 5. J. Marshall. On the development of the great anterior veins in man and mammalia: including an account of certain remnants of fetal structure found in the adult, a comparative view of these great veins in the different mammalia, an analysis of t ...
Microelectrode and His Bundle Studies on Type I and II Second
... in an in vivo dog preparation in which electrograms were recorded from the right atrium (RA), bundle of His (H), and left endocardial Purkinje fiber (LPF) simultaneously with the lead II electrocardiogram (II). Time marks denote 100 msec intervals. The right atrium was paced at a basic cycle length ...
... in an in vivo dog preparation in which electrograms were recorded from the right atrium (RA), bundle of His (H), and left endocardial Purkinje fiber (LPF) simultaneously with the lead II electrocardiogram (II). Time marks denote 100 msec intervals. The right atrium was paced at a basic cycle length ...
ADVANCES IN ARRHYTHMIA MANAGEMENT Program Director: Neala J. Hunter, MD, FACC
... This educational activity is designed to present state-of-the-art knowledge in electrophysiology and arrhythmia management. The program will feature the current and novel modalities of treatment of atrial fibrillation ablation, novel anticoagulants, ventricular arrhythmias and device management, and ...
... This educational activity is designed to present state-of-the-art knowledge in electrophysiology and arrhythmia management. The program will feature the current and novel modalities of treatment of atrial fibrillation ablation, novel anticoagulants, ventricular arrhythmias and device management, and ...
Body height and arterial pressure in seated and supine young males
... Anthropometric measures. Body height was determined with a Leicester height-measuring scale. To estimate arterial pressure at the level of the carotid sinus and at the level of the aortic valves, we used anthropometric data obtained in a recent publication (1) from 75 subjects with a body height var ...
... Anthropometric measures. Body height was determined with a Leicester height-measuring scale. To estimate arterial pressure at the level of the carotid sinus and at the level of the aortic valves, we used anthropometric data obtained in a recent publication (1) from 75 subjects with a body height var ...
Chapter 18 Powerpoint A
... pulmonary and systemic circuits • Pulmonary circuit short, low-pressure circulation • Systemic circuit long, high-friction circulation • Anatomy of ventricles reflects differences – Left ventricle walls 3X thicker than right • Pumps with greater pressure © 2013 Pearson Education, Inc. ...
... pulmonary and systemic circuits • Pulmonary circuit short, low-pressure circulation • Systemic circuit long, high-friction circulation • Anatomy of ventricles reflects differences – Left ventricle walls 3X thicker than right • Pumps with greater pressure © 2013 Pearson Education, Inc. ...
3D Fusion of LV Venous Anatomy on Fluoroscopy Venograms With
... 3D anatomy. 3D LV epicardial surface was extracted from SPECT MPI. SPECT-vein fusion that consisted of geometric alignment, landmark-based registration, and vessel-surface overlay was developed to fuse the 3D venous anatomy with the epicardial surface. The accuracy of this tool was evaluated using c ...
... 3D anatomy. 3D LV epicardial surface was extracted from SPECT MPI. SPECT-vein fusion that consisted of geometric alignment, landmark-based registration, and vessel-surface overlay was developed to fuse the 3D venous anatomy with the epicardial surface. The accuracy of this tool was evaluated using c ...
Molecular Mechanisms of Myocardial Remodeling
... the apex. Later, what is usually called remodeling is characterized by additional enlargement and sphericity of the ventricle, a decrease in stroke volume, and impaired diastolic filling (88, 148, 208, 288, 303, 352). Based on these observations, the following model of ventricular remodeling after M ...
... the apex. Later, what is usually called remodeling is characterized by additional enlargement and sphericity of the ventricle, a decrease in stroke volume, and impaired diastolic filling (88, 148, 208, 288, 303, 352). Based on these observations, the following model of ventricular remodeling after M ...
Ann Intern Med. 2003
... Clinical Guidelines Management of Newly Detected Atrial Fibrillation: A Clinical Practice Guideline from the American Academy of Family Physicians and the American College of Physicians ...
... Clinical Guidelines Management of Newly Detected Atrial Fibrillation: A Clinical Practice Guideline from the American Academy of Family Physicians and the American College of Physicians ...
Management of New Detected Atrial Fibrillation
... Clinical Guidelines Management of Newly Detected Atrial Fibrillation: A Clinical Practice Guideline from the American Academy of Family Physicians and the American College of Physicians ...
... Clinical Guidelines Management of Newly Detected Atrial Fibrillation: A Clinical Practice Guideline from the American Academy of Family Physicians and the American College of Physicians ...
Acute cardiogenic pulmonary edema – an important
... regurgitation after physical effort in patients recovering after ACPE, as compared with the lack of aggravation after physical effort in patients without a history of ACPE. This is also the main limitation of the study. The patients were not evaluated during ACPE, but afterwards, during treadmill te ...
... regurgitation after physical effort in patients recovering after ACPE, as compared with the lack of aggravation after physical effort in patients without a history of ACPE. This is also the main limitation of the study. The patients were not evaluated during ACPE, but afterwards, during treadmill te ...
Reduced inotropic heart response in selenium-deficient - AJP
... could be a direct interaction between NO and catecholamines because Klatt et al. (26) have presented evidence that NO can cause an oxidative inactivation and degradation of Iso in adipocyte cultures (26). However, there is no conclusive evidence that this process plays any role in vivo (26). In pion ...
... could be a direct interaction between NO and catecholamines because Klatt et al. (26) have presented evidence that NO can cause an oxidative inactivation and degradation of Iso in adipocyte cultures (26). However, there is no conclusive evidence that this process plays any role in vivo (26). In pion ...
Arrhythmia Risk and Obesity
... P wave indices, derived from the surface ECG, include P-wave duration, morphology and amplitude, may assess atrial electric function, progressively altered by obesity [27,53]. P wave dispersion, the difference between maximum and minimum P wave duration, an electrocardiographic marker for the predic ...
... P wave indices, derived from the surface ECG, include P-wave duration, morphology and amplitude, may assess atrial electric function, progressively altered by obesity [27,53]. P wave dispersion, the difference between maximum and minimum P wave duration, an electrocardiographic marker for the predic ...
infarction: a corollary to infarct expansion
... admission and 2 weeks later in 30 patients with their first acute transmural myocardial infarction. All patients demonstrated chest pain, ST segment elevation with subsequent development of Q waves (15 anterior, 15 inferior), and elevation of cardiac enzymes. Sequential left ventricular angiographic ...
... admission and 2 weeks later in 30 patients with their first acute transmural myocardial infarction. All patients demonstrated chest pain, ST segment elevation with subsequent development of Q waves (15 anterior, 15 inferior), and elevation of cardiac enzymes. Sequential left ventricular angiographic ...
circ.ahajournals.org
... Background—Catheter ablation of ventricular tachycardia (VT) after repair of congenital heart disease can be difficult because of nonmappable VTs and complex anatomy. Insights into the relation between anatomic isthmuses identified by delineating unexcitable tissue using substrate mapping techniques ...
... Background—Catheter ablation of ventricular tachycardia (VT) after repair of congenital heart disease can be difficult because of nonmappable VTs and complex anatomy. Insights into the relation between anatomic isthmuses identified by delineating unexcitable tissue using substrate mapping techniques ...
Tetralogy of Fallot - RSNA Publications Online
... scheduled consecutively to undergo cardiac MR imaging at rest for clinical follow-up of pulmonary regurgitation and biventricular function. Patients who did not have contraindications for MR imaging examination (eg, a pacemaker, arrhythmias, claustrophobia) or bicycle exercise. Nine healthy control ...
... scheduled consecutively to undergo cardiac MR imaging at rest for clinical follow-up of pulmonary regurgitation and biventricular function. Patients who did not have contraindications for MR imaging examination (eg, a pacemaker, arrhythmias, claustrophobia) or bicycle exercise. Nine healthy control ...
Mechanical Complications of Acute Myocardial Infarction
... • Chest pain extends to back, neck, or shoulders – Worsened by movement and respiration – Relieved by sitting up and leaning forward ...
... • Chest pain extends to back, neck, or shoulders – Worsened by movement and respiration – Relieved by sitting up and leaning forward ...
as PDF
... action potentials or the propagation of the normal electrical signals to the working ventricle is disrupted. The latent pacemakers in atria and Purkinje fibers will pace at their own rates (slower than the sinus rate). This creates an asynchronous rhythmic contraction of the heart muscle leading to ...
... action potentials or the propagation of the normal electrical signals to the working ventricle is disrupted. The latent pacemakers in atria and Purkinje fibers will pace at their own rates (slower than the sinus rate). This creates an asynchronous rhythmic contraction of the heart muscle leading to ...
Innocent Heart Murmurs
... Almost every child you listen to with a stethoscope will have a heart murmur. The incidence of congenital heart disease is approximately 8 per 1,000, so this means that the vast majority of children with heart murmurs have a normal heart. The aim of this book is to get you more comfortable not only ...
... Almost every child you listen to with a stethoscope will have a heart murmur. The incidence of congenital heart disease is approximately 8 per 1,000, so this means that the vast majority of children with heart murmurs have a normal heart. The aim of this book is to get you more comfortable not only ...
Characterization and Modeling of the Purkinje System for Biophysical Simulations
... Figure 1.2 lists the main components needed for a complete model of the CCS, as proposed in [96], together with the challenging data (e.g. invasive electro-anatomical maps, histology, ex-vivo) that can provide partial information about its anatomy and functional behaviour (i.e. electrophysiology). A ...
... Figure 1.2 lists the main components needed for a complete model of the CCS, as proposed in [96], together with the challenging data (e.g. invasive electro-anatomical maps, histology, ex-vivo) that can provide partial information about its anatomy and functional behaviour (i.e. electrophysiology). A ...
Cardiac Transplantation in a Patient With a Persistent Left Superior
... abnormality that may require more complex surgical management if not diagnosed before the operation, a situation reported rather often in the literature. This malformation may be suspected before surgery when there is evidence of mediastinal widening, abnormal positioning of the central venous cathe ...
... abnormality that may require more complex surgical management if not diagnosed before the operation, a situation reported rather often in the literature. This malformation may be suspected before surgery when there is evidence of mediastinal widening, abnormal positioning of the central venous cathe ...
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.