Atrial pacing for the prevention of atrial fibrillation after
... Washington, DC The purpose of this study was to determine the efficacy of atrial pacing in the prevention of atrial fibrillation following cardiovascular surgery. ...
... Washington, DC The purpose of this study was to determine the efficacy of atrial pacing in the prevention of atrial fibrillation following cardiovascular surgery. ...
Atrial natriuretic polypeptide is removed by the lungs and released
... thought to be synthesized and stored in the atria but not in the ventricles in adult mammals, more recent studies (IS-lg) show that it is also present in tiny amounts in extra-atria] sites, including the ventricles. Three distinct molecular forms of human atrial natriuretic polypeptide, (Y,/3and y, ...
... thought to be synthesized and stored in the atria but not in the ventricles in adult mammals, more recent studies (IS-lg) show that it is also present in tiny amounts in extra-atria] sites, including the ventricles. Three distinct molecular forms of human atrial natriuretic polypeptide, (Y,/3and y, ...
Optimal pacing strategies for coming off CPB
... In DVI mode, sensing of an intrinsic ventricular depolarization (following either an atrial pacing spike or intrinsic atrial depolarization), inhibits ventricular pacing. In the absence of any intrinsic cardiac depolarization, the pacemaker behaves like a DOO. Since there is no atrial sensing, ther ...
... In DVI mode, sensing of an intrinsic ventricular depolarization (following either an atrial pacing spike or intrinsic atrial depolarization), inhibits ventricular pacing. In the absence of any intrinsic cardiac depolarization, the pacemaker behaves like a DOO. Since there is no atrial sensing, ther ...
Congenital secundum atrial septal defect and
... There are 3 major arteriovenous communications in the development of the heart. These communications are localized between the atria, the ventricles, and the great vessels (5). Defects such as patent ductus arteriosus, ASD, and VSD constitute failures of closure. Failure of closure may itself cause ...
... There are 3 major arteriovenous communications in the development of the heart. These communications are localized between the atria, the ventricles, and the great vessels (5). Defects such as patent ductus arteriosus, ASD, and VSD constitute failures of closure. Failure of closure may itself cause ...
Potent and Reversible Effects of ATI
... picted in Figs. 2 and 3, respectively. At a concentration of 1.0 M, ATI-2001 prolonged atrial MAPD and ERP more rapidly and to a greater extent than did amiodarone. That is, the drug-induced prolongation of the MAPD90 achieved statistical significance after 30- and 60-min infusion times in the ATI- ...
... picted in Figs. 2 and 3, respectively. At a concentration of 1.0 M, ATI-2001 prolonged atrial MAPD and ERP more rapidly and to a greater extent than did amiodarone. That is, the drug-induced prolongation of the MAPD90 achieved statistical significance after 30- and 60-min infusion times in the ATI- ...
Global Bi-ventricular endocardial distribution of activation rate
... that the excitation frequency is an important index in VF that can reflect the underlying myocardial pathophysiology; it may also be predictive of the defibrillation threshold [10]. Previous studies have reported that the dynamics of VF in heart failure (HF) hearts differ from those in normal hearts ...
... that the excitation frequency is an important index in VF that can reflect the underlying myocardial pathophysiology; it may also be predictive of the defibrillation threshold [10]. Previous studies have reported that the dynamics of VF in heart failure (HF) hearts differ from those in normal hearts ...
Model 5391 - KentuckyOne Health
... especially suited for stimulation of the heart in the following cases: • treatment of patients before an operation, whereby an implantable pacemaker is being inserted. • treatment of tachyarrhythmia. • treatment of special cases of acute myocardial infarction. • treatment of patients after heart sur ...
... especially suited for stimulation of the heart in the following cases: • treatment of patients before an operation, whereby an implantable pacemaker is being inserted. • treatment of tachyarrhythmia. • treatment of special cases of acute myocardial infarction. • treatment of patients after heart sur ...
introductory guide to identifying ecg irregularities
... sinoatrial (SA) node, a group of specialized cells located in the right atrium, also known as the heart’s natural pacemaker. On average, there are 60 to 100 times discharges per minute. When the SA node discharges, both atria contract, and the electrical impulse is relayed to the atrioventricular (A ...
... sinoatrial (SA) node, a group of specialized cells located in the right atrium, also known as the heart’s natural pacemaker. On average, there are 60 to 100 times discharges per minute. When the SA node discharges, both atria contract, and the electrical impulse is relayed to the atrioventricular (A ...
Mechanism of Ventricular Fibrillation in Hypothermia
... of excitation. As stated by Lewis,2 three factors are important to the development of circus movement fibrillation: (1) the length of the conduction pathway, (2) the conduction velocity, and (3) the duration of the refractory period. A relatively long conduction pathway, a slow conduction velocity, ...
... of excitation. As stated by Lewis,2 three factors are important to the development of circus movement fibrillation: (1) the length of the conduction pathway, (2) the conduction velocity, and (3) the duration of the refractory period. A relatively long conduction pathway, a slow conduction velocity, ...
ECG Rhythm Interpretation December 16 & 18
... When blood flows through the heart, it follows a unidirectional pattern. There are four different valves within the myocardium and their functions are to assure blood flows from the right to left side of the myocardium and always in a “forward” direction. The two valves found between the atria and v ...
... When blood flows through the heart, it follows a unidirectional pattern. There are four different valves within the myocardium and their functions are to assure blood flows from the right to left side of the myocardium and always in a “forward” direction. The two valves found between the atria and v ...
Percutaneous closure of multiple atrial septal defects and patent
... with multiple or complex, fenestrated defects, a single device can be placed through one defect so that it overlaps and closes a second defect. In our case, we were able to close three defects with a single device because of the short distance between them. Devices designed to cover a large part of ...
... with multiple or complex, fenestrated defects, a single device can be placed through one defect so that it overlaps and closes a second defect. In our case, we were able to close three defects with a single device because of the short distance between them. Devices designed to cover a large part of ...
PowerPoint - Electrocardiography
... PR interval does not change P-P interval is consistent, so SA node is working fine PR interval may be prolonged and may be normal Occasionally, a P wave is not followed by a QRS ...
... PR interval does not change P-P interval is consistent, so SA node is working fine PR interval may be prolonged and may be normal Occasionally, a P wave is not followed by a QRS ...
2012 focused update of the ESC Guidelines
... a particular issue with the aim of assisting physicians in selecting the best management strategy for an individual patient suffering from a given condition, taking into account the impact on outcome, as well as the risk–benefit ratio of particular diagnostic or therapeutic means. Guidelines are no ...
... a particular issue with the aim of assisting physicians in selecting the best management strategy for an individual patient suffering from a given condition, taking into account the impact on outcome, as well as the risk–benefit ratio of particular diagnostic or therapeutic means. Guidelines are no ...
2012 focused update of the ESC Guidelines for the management of
... a particular issue with the aim of assisting physicians in selecting the best management strategy for an individual patient suffering from a given condition, taking into account the impact on outcome, as well as the risk–benefit ratio of particular diagnostic or therapeutic means. Guidelines are no ...
... a particular issue with the aim of assisting physicians in selecting the best management strategy for an individual patient suffering from a given condition, taking into account the impact on outcome, as well as the risk–benefit ratio of particular diagnostic or therapeutic means. Guidelines are no ...
2012 focused update of the ESC Guidelines for the management of
... a particular issue with the aim of assisting physicians in selecting the best management strategy for an individual patient suffering from a given condition, taking into account the impact on outcome, as well as the risk–benefit ratio of particular diagnostic or therapeutic means. Guidelines are no ...
... a particular issue with the aim of assisting physicians in selecting the best management strategy for an individual patient suffering from a given condition, taking into account the impact on outcome, as well as the risk–benefit ratio of particular diagnostic or therapeutic means. Guidelines are no ...
Inappropriate Sinus Tachycardia After Radiofrequency Ablation of
... diogram, and 24-hour Holter monitoring were perfomied in all patients. Those who showed 1ST underwent Holter monitoring 3 and 30 days after the procedure. During a 1-year follow-up, all patients underwent a control visit every 3 months. Definition of 1ST The reeognition of 1ST was based on both symp ...
... diogram, and 24-hour Holter monitoring were perfomied in all patients. Those who showed 1ST underwent Holter monitoring 3 and 30 days after the procedure. During a 1-year follow-up, all patients underwent a control visit every 3 months. Definition of 1ST The reeognition of 1ST was based on both symp ...
Focused update 2012 on atrial fibrillation
... a particular issue with the aim of assisting physicians in selecting the best management strategy for an individual patient suffering from a given condition, taking into account the impact on outcome, as well as the risk–benefit ratio of particular diagnostic or therapeutic means. Guidelines are no ...
... a particular issue with the aim of assisting physicians in selecting the best management strategy for an individual patient suffering from a given condition, taking into account the impact on outcome, as well as the risk–benefit ratio of particular diagnostic or therapeutic means. Guidelines are no ...
Hypertension and Hyperlipidemia in 2017 Disclosures Learning
... • At the conclusion of this session, participants should be able to: – Review the current status on the epidemiology, diagnosis, and treatment of hypertension in the US – Discuss major differences between JNC7 and JNC8 – Reconcile the differences in treatment recommendations among the most recently ...
... • At the conclusion of this session, participants should be able to: – Review the current status on the epidemiology, diagnosis, and treatment of hypertension in the US – Discuss major differences between JNC7 and JNC8 – Reconcile the differences in treatment recommendations among the most recently ...
ECG Guide - Banner Health
... The patient’s heart rate reveals a great deal of information. If the rate is slow (under 60 beats per minute), we call it bradycardia. If the heart rate is fast (over 100 beats per minute), then it is called tachycardia. ECG monitors display the heart rate. When an ECG strip is printed, most printer ...
... The patient’s heart rate reveals a great deal of information. If the rate is slow (under 60 beats per minute), we call it bradycardia. If the heart rate is fast (over 100 beats per minute), then it is called tachycardia. ECG monitors display the heart rate. When an ECG strip is printed, most printer ...
electrophysiology study and Catheter Ablation
... After the wires have been positioned, electrical testing of the heart is performed. You may experience palpitations or a sensation of racing heartbeat as a result of the electrical stimulation or rhythm disturbance. The rhythm can be restored to normal, usually with small electrical impulses (which ...
... After the wires have been positioned, electrical testing of the heart is performed. You may experience palpitations or a sensation of racing heartbeat as a result of the electrical stimulation or rhythm disturbance. The rhythm can be restored to normal, usually with small electrical impulses (which ...
An Improved Method for Echographic Detection of Left
... Ani echographic "sweep' of the left ventricular outflow tract utilizing a continuous strip) chart recorder (record not retoulched). Area A is the central region of the left ventricle (LV) and is characterized by the echoes from the interve ntricuilar septum (IVS), left ventricular posterior wall (LV ...
... Ani echographic "sweep' of the left ventricular outflow tract utilizing a continuous strip) chart recorder (record not retoulched). Area A is the central region of the left ventricle (LV) and is characterized by the echoes from the interve ntricuilar septum (IVS), left ventricular posterior wall (LV ...
Jugular Venous Pulse: Window into the Right Heart
... angles of positioning, the average distance varied between 8 and 10 cm.23 Therefore, adding 5 cm H20 to the vertical distance measured on physical examination may be an accurate estimation of jugular venous pressure for patients in the supine position; however, when the head is elevated, this method ...
... angles of positioning, the average distance varied between 8 and 10 cm.23 Therefore, adding 5 cm H20 to the vertical distance measured on physical examination may be an accurate estimation of jugular venous pressure for patients in the supine position; however, when the head is elevated, this method ...
Navigational error in the heart leads to premature ventricular excitation
... In the normal heart, an insulating barrier separates the atria and ventricles. The only way in which electrical impulses can cross this barrier is via the atrioventricular (AV) node, which delays impulse conduction to ensure the forward flow of the blood. However, in some individuals, additional mus ...
... In the normal heart, an insulating barrier separates the atria and ventricles. The only way in which electrical impulses can cross this barrier is via the atrioventricular (AV) node, which delays impulse conduction to ensure the forward flow of the blood. However, in some individuals, additional mus ...
Name of presentation
... ECG – The Cardiac Cycle QRS complex • ventricular depolarization (systole) • Q wave 1st negative deflection • R wave 1st positive deflection • S wave 2nd negative deflection • HS1 at beginning of QRS • HS2 at end of QRS ...
... ECG – The Cardiac Cycle QRS complex • ventricular depolarization (systole) • Q wave 1st negative deflection • R wave 1st positive deflection • S wave 2nd negative deflection • HS1 at beginning of QRS • HS2 at end of QRS ...
Atrial fibrillation
Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm characterized by rapid and irregular beating. Often it starts as brief periods of abnormal beating which become longer and possibly constant over time. Most episodes have no symptoms. Occasionally there may be heart palpitations, fainting, shortness of breath, or chest pain. The disease increases the risk of heart failure, dementia, and stroke.Hypertension and valvular heart disease are the most common alterable risk factors for AF. Other heart-related risk factors include heart failure, coronary artery disease, cardiomyopathy, and congenital heart disease. In the developing world valvular heart disease often occurs as a result of rheumatic fever. Lung-related risk factors include COPD, obesity, and sleep apnea. Other factors include excess alcohol intake, diabetes mellitus, and thyrotoxicosis. However, half of cases are not associated with one of these risks. A diagnosis is made by feeling the pulse and may be confirmed using an electrocardiogram (ECG). The typical ECG shows no P waves and an irregular ventricular rate.AF is often treated with medications to slow the heart rate to a near normal range (known as rate control) or to convert the rhythm to normal sinus rhythm (known as rhythm control). Electrical cardioversion can also be used to convert AF to a normal sinus rhythm and is often used emergently if the person is unstable. Ablation may prevent recurrence in some people. Depending on the risk of stroke either aspirin or anti-clotting medications such as warfarin or a novel oral anticoagulant may be recommended. While these medications reduce this risk, they increase rates of major bleeding.Atrial fibrillation is the most common serious abnormal heart rhythm. In Europe and North America, as of 2014, it affects about 2% to 3% of the population. This is an increase from 0.4 to 1% of the population around 2005. In the developing world about 0.6% of males and 0.4% of females are affected. The percentage of people with AF increases with age with 0.14% under 50 years old, 4% between 60 and 70 years old, and 14% over 80 years old being affected. A-fib and atrial flutter resulted in 112,000 deaths in 2013, up from 29,000 in 1990. The first known report of an irregular pulse was by John Baptist Senac in 1749. This was first documented by ECG in 1909 by Thomas Lewis.