Experimental Auricular Flutter
... injury between superior and inferior vena cava. In these latter experiments the administration of lanatoside C or g-strophanthin produced results similar to those seen in the denervated hearts. The number of experiments is not sufficient to allow any conclusions concerning the establishment of quant ...
... injury between superior and inferior vena cava. In these latter experiments the administration of lanatoside C or g-strophanthin produced results similar to those seen in the denervated hearts. The number of experiments is not sufficient to allow any conclusions concerning the establishment of quant ...
Why, When and How Should Atrial Septal Defects Be
... A number of devices are available to the interventional cardiologist for closure of ASD, but selection of an appropriate device is difficult because of lack of randomized clinical trials. Some studies (Formigari et al 1998, Walsh et al 1999, Sievert et al 1999, Keppeir 1999, Godart et al 2000, Buter ...
... A number of devices are available to the interventional cardiologist for closure of ASD, but selection of an appropriate device is difficult because of lack of randomized clinical trials. Some studies (Formigari et al 1998, Walsh et al 1999, Sievert et al 1999, Keppeir 1999, Godart et al 2000, Buter ...
Incidence and mortality risk of congestive heart failure in
... Baseline characteristics were summarized in terms of mean values and standard deviations, or frequency numbers and per cents, and assessed for trends across the calendar year of AF diagnosis (regarded as a continuous variable). Linear regression analyses were used for the baseline continuous variabl ...
... Baseline characteristics were summarized in terms of mean values and standard deviations, or frequency numbers and per cents, and assessed for trends across the calendar year of AF diagnosis (regarded as a continuous variable). Linear regression analyses were used for the baseline continuous variabl ...
Cardiovascular risks associated with non-‐aspirin non
... age of the COX-‐1 enzyme. Accordingly, the main indication for low-‐dose aspirin is prevention and treatment of occlusive vascular events in patients with ischemic heart disease, transient ischemic ...
... age of the COX-‐1 enzyme. Accordingly, the main indication for low-‐dose aspirin is prevention and treatment of occlusive vascular events in patients with ischemic heart disease, transient ischemic ...
Catheter Ablation as Treatment for Atrial Fibrillation
... The most common focal trigger of AF appears to be located within the cardiac muscle that extends into the pulmonary veins. AF accounts for approximately one-third of hospitalizations for cardiac rhythm disturbances. Symptoms of AF, (e.g., palpitations, decreased exercise tolerance, and dyspnea) are ...
... The most common focal trigger of AF appears to be located within the cardiac muscle that extends into the pulmonary veins. AF accounts for approximately one-third of hospitalizations for cardiac rhythm disturbances. Symptoms of AF, (e.g., palpitations, decreased exercise tolerance, and dyspnea) are ...
Electromechanical wave imaging (EWI) validation in all four cardiac
... (Some figures may appear in colour only in the online journal) Introduction Arrhythmias such as atrial and ventricular tachycardia, atrial flutter, and atrial fibrillation affect millions of people worldwide (Mozaffarian et al 2015). These arrhythmias are the result of abnormal electrical activation ...
... (Some figures may appear in colour only in the online journal) Introduction Arrhythmias such as atrial and ventricular tachycardia, atrial flutter, and atrial fibrillation affect millions of people worldwide (Mozaffarian et al 2015). These arrhythmias are the result of abnormal electrical activation ...
Editorials Original Articles - Circulation: Arrhythmia and
... CIRCULATION: ARRHYTHMIA AND ELECTROPHYSIOLOGY (ISSN 1941-3084) is published monthly online-only by Wolters Kluwer Health, Inc. at 14700 Citicorp Drive, Bldg 3, Hagerstown, MD 21742. Business offices are located at Two Commerce Square, 2001 Market Street, Philadelphia, PA 19103. Production offices ar ...
... CIRCULATION: ARRHYTHMIA AND ELECTROPHYSIOLOGY (ISSN 1941-3084) is published monthly online-only by Wolters Kluwer Health, Inc. at 14700 Citicorp Drive, Bldg 3, Hagerstown, MD 21742. Business offices are located at Two Commerce Square, 2001 Market Street, Philadelphia, PA 19103. Production offices ar ...
Differential diagnosis of broad complex tachycardia
... • lateral free wall of the ventricle very wide QRS. • close to the IVS Smaller QRS When during tachycardia, the QRS is more narrow than during sinus rhythm, VT should be diagnosed. other factors that play a role in the QRS width • scar tissue (after MI) • ventricular hypertrophy • muscular disar ...
... • lateral free wall of the ventricle very wide QRS. • close to the IVS Smaller QRS When during tachycardia, the QRS is more narrow than during sinus rhythm, VT should be diagnosed. other factors that play a role in the QRS width • scar tissue (after MI) • ventricular hypertrophy • muscular disar ...
Characterization of Atrial Repolarization Alternans and
... model yielded large amounts of data perturbed by unavoidable interferences, and the phenomenon of interest had an elusive nature. This thesis describes the physiological motivation for this study, introduces the signal processing techniques developed to remove interferences and extract the parameter ...
... model yielded large amounts of data perturbed by unavoidable interferences, and the phenomenon of interest had an elusive nature. This thesis describes the physiological motivation for this study, introduces the signal processing techniques developed to remove interferences and extract the parameter ...
Heart Rate Monitoring and PQRST Detection Based on
... Whether there has been a prior heart attack. Whether there may be coronary artery disease. Whether there are “conduction abnormalities” (abnormalities in how the electrical impulse spreads across the heart). All of these traits can be significant and important.When the ECG indicates a heart at ...
... Whether there has been a prior heart attack. Whether there may be coronary artery disease. Whether there are “conduction abnormalities” (abnormalities in how the electrical impulse spreads across the heart). All of these traits can be significant and important.When the ECG indicates a heart at ...
ACC/AHA/ESC Practice Guidelines
... When citing this document, the American College of Cardiology Foundation, the American Heart Association, and the European Society of Cardiology request that the following citation format be used: Blomström-Lundqvist C, Scheinman MM, Aliot EM, Alpert JS, Calkins H, Camm AJ, Campbell WB, Haines DE, K ...
... When citing this document, the American College of Cardiology Foundation, the American Heart Association, and the European Society of Cardiology request that the following citation format be used: Blomström-Lundqvist C, Scheinman MM, Aliot EM, Alpert JS, Calkins H, Camm AJ, Campbell WB, Haines DE, K ...
Cardiac Rhythms
... • usually between 0.36 and 0.44 second • varies greatly according to age, gender ,heart rate, and whether the patient is asleep • should be less than 1/2 the distance between two consecutive R waves (R-R interval) when the rhythm is regular Prolonged QT interval: Repolarization means that the muscle ...
... • usually between 0.36 and 0.44 second • varies greatly according to age, gender ,heart rate, and whether the patient is asleep • should be less than 1/2 the distance between two consecutive R waves (R-R interval) when the rhythm is regular Prolonged QT interval: Repolarization means that the muscle ...
ACC/AHA/ESC Practice Guideline
... definition of this arrhythmia in the general population. The estimated prevalence of paroxysmal supraventricular tachycardia (PSVT) in a 3.5% sample of medical records in the Marshfield (Wisconsin) Epidemiologic Study Area (MESA) was 2.25 per 1000.3 The incidence of PSVT in this survey was 35 per 10 ...
... definition of this arrhythmia in the general population. The estimated prevalence of paroxysmal supraventricular tachycardia (PSVT) in a 3.5% sample of medical records in the Marshfield (Wisconsin) Epidemiologic Study Area (MESA) was 2.25 per 1000.3 The incidence of PSVT in this survey was 35 per 10 ...
ACC/AHA/ESC guidelines for the management of patients with
... this population database. In approximately 60% of cases, atrial flutter occurred for the first time in association with a specific precipitating event (i.e., major surgery, pneumonia, or acute myocardial infarction). In the remaining patients, atrial flutter was associated with chronic comorbid cond ...
... this population database. In approximately 60% of cases, atrial flutter occurred for the first time in association with a specific precipitating event (i.e., major surgery, pneumonia, or acute myocardial infarction). In the remaining patients, atrial flutter was associated with chronic comorbid cond ...
Temporary epicardial pacing after cardiac surgery
... Specific electrophysiological conditions that may benefit from temporary pacing are listed in Table 1. Whereas many ...
... Specific electrophysiological conditions that may benefit from temporary pacing are listed in Table 1. Whereas many ...
Inferior Leads - Cardiology.org
... QRS, J waves as an upward deflection and slurs as a conduction delay on the QRS down stroke. To simulate visual reading of the ECG, ≥0.9 mV was used for computer coding because of the human tendency to round readings to the full millimeter scaling. While our initial reports considered multiple area ...
... QRS, J waves as an upward deflection and slurs as a conduction delay on the QRS down stroke. To simulate visual reading of the ECG, ≥0.9 mV was used for computer coding because of the human tendency to round readings to the full millimeter scaling. While our initial reports considered multiple area ...
Hemodynamic Monitoring in the CCU
... AV Junctional (Nodal) Rhythm •During a nodal rhythm, atrial systole can either precede or follow ventricular systole. •AV dissociation may also occur. •When the sequence of atrial and ventricular systole is reversed, Cannon waves will be present on the atrial pressure waveform. ...
... AV Junctional (Nodal) Rhythm •During a nodal rhythm, atrial systole can either precede or follow ventricular systole. •AV dissociation may also occur. •When the sequence of atrial and ventricular systole is reversed, Cannon waves will be present on the atrial pressure waveform. ...
Hemodynamic Monitoring in the CCU
... AV Junctional (Nodal) Rhythm •During a nodal rhythm, atrial systole can either precede or follow ventricular systole. •AV dissociation may also occur. •When the sequence of atrial and ventricular systole is reversed, Cannon waves will be present on the atrial pressure waveform. ...
... AV Junctional (Nodal) Rhythm •During a nodal rhythm, atrial systole can either precede or follow ventricular systole. •AV dissociation may also occur. •When the sequence of atrial and ventricular systole is reversed, Cannon waves will be present on the atrial pressure waveform. ...
Arrhythmias - Cardiac Associates
... detection of a heart murmur alone does not necessarily mean there is a problem with the heart or any of its valves. More information will be needed before it can be labeled a problem. The next step is to schedule one or more routine non-invasive tests designed to identify heart problems with a minim ...
... detection of a heart murmur alone does not necessarily mean there is a problem with the heart or any of its valves. More information will be needed before it can be labeled a problem. The next step is to schedule one or more routine non-invasive tests designed to identify heart problems with a minim ...
Survival After Rate-Responsive Programming in Patients With
... a wide QRS.1–4 Controlled, randomized CRT trials have used atrial sensing to provide atrial-synchronized biventricular pacing, but have not focused on atrial pacing or rate response. Current CRT devices are capable of atrial pacing for atrial rate support and rate-responsive pacing (DDDR), and these ...
... a wide QRS.1–4 Controlled, randomized CRT trials have used atrial sensing to provide atrial-synchronized biventricular pacing, but have not focused on atrial pacing or rate response. Current CRT devices are capable of atrial pacing for atrial rate support and rate-responsive pacing (DDDR), and these ...
YOU CAN LIVE WITH IT! - Cardiovascular Consultants
... detection of a heart murmur alone does not necessarily mean there is a problem with the heart or any of its valves. More information will be needed before it can be labeled a problem. The next step is to schedule one or more routine non-invasive tests designed to identify heart problems with a minim ...
... detection of a heart murmur alone does not necessarily mean there is a problem with the heart or any of its valves. More information will be needed before it can be labeled a problem. The next step is to schedule one or more routine non-invasive tests designed to identify heart problems with a minim ...
the role of open mitral valve repair or replacement for severe mitral
... PATHOLOGY OF MITRAL VALVE STENOSIS The most common cause of mitral stenosis is rheumatic fever. Following the initial episode of rheumatic carditis, the inflamed leaflets adhere to each other on their atrial surfaces at the commissures, leaving a central orifice and causing mitral stenosis. In some ...
... PATHOLOGY OF MITRAL VALVE STENOSIS The most common cause of mitral stenosis is rheumatic fever. Following the initial episode of rheumatic carditis, the inflamed leaflets adhere to each other on their atrial surfaces at the commissures, leaving a central orifice and causing mitral stenosis. In some ...
CHANGES IN AUTONOMIC TONE RESULTING FROM CIRCUMFERENTIAL PULMONARY VEIN ISOLATION by GEOFFREY SEABORN
... subclavian vein. Once inserted, the catheters are advanced into the heart. High-frequency electrical impulses are then used to induce arrhythmia, at which point the catheters are used to administer radiofrequency (RF) power to destroy the tissue causing it. This procedure is ...
... subclavian vein. Once inserted, the catheters are advanced into the heart. High-frequency electrical impulses are then used to induce arrhythmia, at which point the catheters are used to administer radiofrequency (RF) power to destroy the tissue causing it. This procedure is ...
Full Text - Digital Access to Scholarship at Harvard
... SAN cells was recorded under perforated patch conditions by adding 50 µM -escin to the pipette solution. Isolated Langendorff perfused intact hearts Excised hearts were quickly mounted on a Langendorff apparatus (Isolated heart system; EMKA Technologies) at a constant pressure of 80 mm Hg with norm ...
... SAN cells was recorded under perforated patch conditions by adding 50 µM -escin to the pipette solution. Isolated Langendorff perfused intact hearts Excised hearts were quickly mounted on a Langendorff apparatus (Isolated heart system; EMKA Technologies) at a constant pressure of 80 mm Hg with norm ...
percutaneous coronary intervention in patients with atrial
... risk of major bleeding (I). Uninterrupted warfarin treatment did not increase perioperative complications and seemed to decrease bleeding complications compared to heparin bridging (II). Already mild renal impairment (eGFR 60– 90mL/min) was associated with a 2.3‐fol ...
... risk of major bleeding (I). Uninterrupted warfarin treatment did not increase perioperative complications and seemed to decrease bleeding complications compared to heparin bridging (II). Already mild renal impairment (eGFR 60– 90mL/min) was associated with a 2.3‐fol ...
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.