Differential diagnosis of broad complex tachycardia
... • Complete AV dissociation seen in 20 to 50 % of VT(sensitivity .2 to .5,specificity 1) • 15 to 20% of VT has 2nd degree V A block • Lewis leads-p waves seen better with arm leads at various levels on opposite sides of sternum • Psudo p waves-contour of terminal portion of QRS may resmble p-inspect ...
... • Complete AV dissociation seen in 20 to 50 % of VT(sensitivity .2 to .5,specificity 1) • 15 to 20% of VT has 2nd degree V A block • Lewis leads-p waves seen better with arm leads at various levels on opposite sides of sternum • Psudo p waves-contour of terminal portion of QRS may resmble p-inspect ...
SafeR Pacing Mode
... When operating in AAI mode, the device will continuously monitor the AV conduction activity (ADI mode) and will switch to DDD mode following one of four criteria (see section “Temporary switches from AAI into DDD mode”, page 3) in the event of AV conduction failure. When operating in DDD mode, the d ...
... When operating in AAI mode, the device will continuously monitor the AV conduction activity (ADI mode) and will switch to DDD mode following one of four criteria (see section “Temporary switches from AAI into DDD mode”, page 3) in the event of AV conduction failure. When operating in DDD mode, the d ...
Verapamil-induced polymorphous ventricular tachycardia
... to cease (l). Simultaneously, verapamil induces a catecholamine surge, in part because of its hypotensive effects. Thus, a high state of adrenergic tone could have resulted in triggered forms of automaticity and caused the particular arrhythmia. Myocardial ischemia due to profound hypotension may ca ...
... to cease (l). Simultaneously, verapamil induces a catecholamine surge, in part because of its hypotensive effects. Thus, a high state of adrenergic tone could have resulted in triggered forms of automaticity and caused the particular arrhythmia. Myocardial ischemia due to profound hypotension may ca ...
Modeling and Verification of Safety Critical Systems: A Case Study
... left sections by the interventricular septum. Each of these (right and left) sections is also divided into upper and lower compartments known as atria and ventricles, respectively. The four main chambers of the heart are therefore the: right atrium, right ventricle, left atrium and left ventricle. A ...
... left sections by the interventricular septum. Each of these (right and left) sections is also divided into upper and lower compartments known as atria and ventricles, respectively. The four main chambers of the heart are therefore the: right atrium, right ventricle, left atrium and left ventricle. A ...
Obesity and atrial electrical and mechanical remodeling
... Epidemiological evidence identifies obesity as an independent risk factor for atrial fibrillation (AF). Additionally, therapeutic outcomes for AF appear to be adversely affected by the presence of obesity. Conditions associated with AF such as hypertension, obstructive sleep apnea, coronary disease ...
... Epidemiological evidence identifies obesity as an independent risk factor for atrial fibrillation (AF). Additionally, therapeutic outcomes for AF appear to be adversely affected by the presence of obesity. Conditions associated with AF such as hypertension, obstructive sleep apnea, coronary disease ...
Non-Invasive Transcutaneous Pacing
... With the pacer on, the defibrillator marks intrinsic beats on the R-wave with a marker on the MRx and an arrow the XL+. The intrinsic beats are also marked in the print strip. When an intrinsic beat is detected, the time interval for the next pace pulse starts at the intrinsic beat. If no intrinsic ...
... With the pacer on, the defibrillator marks intrinsic beats on the R-wave with a marker on the MRx and an arrow the XL+. The intrinsic beats are also marked in the print strip. When an intrinsic beat is detected, the time interval for the next pace pulse starts at the intrinsic beat. If no intrinsic ...
Catheter Ablation for Atrial Fibrillation: Predicting Recurrence
... heterogeneous definitions of recurrence and blanking period lengths (i.e. the period of time between the procedure and when an arrhythmic episode is counted) across studies have not provided definitive conclusions. Variables that have been implicated as potential predictors of recurrence include: ty ...
... heterogeneous definitions of recurrence and blanking period lengths (i.e. the period of time between the procedure and when an arrhythmic episode is counted) across studies have not provided definitive conclusions. Variables that have been implicated as potential predictors of recurrence include: ty ...
Radiofrequency ablation on veno-arterial extracorporeal life support
... the right carotid artery and jugular vein. Thereafter, sinus rhythm could not be maintained despite amiodarone 35 mcg/kg/min and flecainide 2 mg/kg. The patient developed severe pulmonary oedema secondary to left ventricular dysfunction, exaccerbated by the increased afterload caused by the extracor ...
... the right carotid artery and jugular vein. Thereafter, sinus rhythm could not be maintained despite amiodarone 35 mcg/kg/min and flecainide 2 mg/kg. The patient developed severe pulmonary oedema secondary to left ventricular dysfunction, exaccerbated by the increased afterload caused by the extracor ...
Electrophysiology Heart Study - EPS -
... • Some of the pacemaker wires send small electrical impulses called “pacing”. You cannot feel the impulses. The doctor may use these wires to trigger your problem to see what happens inside your heart when you have symptoms. You may feel your heart beating quickly or missing a beat. • If you are hav ...
... • Some of the pacemaker wires send small electrical impulses called “pacing”. You cannot feel the impulses. The doctor may use these wires to trigger your problem to see what happens inside your heart when you have symptoms. You may feel your heart beating quickly or missing a beat. • If you are hav ...
Inotropic, chronotropic, and dromotropic effects - AJP
... activation of pacemaker cells and cardiac muscle cells when a quite narrow stimulation pulse duration (0.01–0.06 ms) for parasympathetic nerve stimulation was used (8). To stimulate extracardiac parasympathetic efferent nerves to the heart, two fine copper needle electrodes were inserted into each c ...
... activation of pacemaker cells and cardiac muscle cells when a quite narrow stimulation pulse duration (0.01–0.06 ms) for parasympathetic nerve stimulation was used (8). To stimulate extracardiac parasympathetic efferent nerves to the heart, two fine copper needle electrodes were inserted into each c ...
Scientech 2138A AT Manual
... complex is normally 0.06 to 0.1 seconds. This relatively short duration indicates that ventricular depolarization normally occurs very rapidly. The T wave represents ventricular repolarization and is longer in duration than depolarization (i.e., conduction of the repolarization wave is slower than t ...
... complex is normally 0.06 to 0.1 seconds. This relatively short duration indicates that ventricular depolarization normally occurs very rapidly. The T wave represents ventricular repolarization and is longer in duration than depolarization (i.e., conduction of the repolarization wave is slower than t ...
Mitral Stenosis
... The increased left atrial pressure associated with mitral stenosis leads to left atrial enlargement, pulmonary hypertension, right ventricular enlargement and tricuspid regurgitation. Left atrial size should be measured in the short axis view of the aortic valve, as this view has best been correlate ...
... The increased left atrial pressure associated with mitral stenosis leads to left atrial enlargement, pulmonary hypertension, right ventricular enlargement and tricuspid regurgitation. Left atrial size should be measured in the short axis view of the aortic valve, as this view has best been correlate ...
Normal electrocardiographic findings: recognising physiological
... the sinus node with decreased automaticity resulting in a high prevalence of sinus bradycardia.16 17 In the absence of symptoms such as fatigue, dizziness or syncope, a heart rate ≥30 beats/min should be considered normal in a well-trained athlete. Sinus bradycardia disappears with an increase in he ...
... the sinus node with decreased automaticity resulting in a high prevalence of sinus bradycardia.16 17 In the absence of symptoms such as fatigue, dizziness or syncope, a heart rate ≥30 beats/min should be considered normal in a well-trained athlete. Sinus bradycardia disappears with an increase in he ...
McSharry P.E., Clifford G.D., Tarassenko L., Smith L.
... In order to illustrate the dynamics of the RR-intervals obtained from this synthetic ECG, peak detection was used to identify the times of the R-peaks. In the noise-free case, a simple algorithm which looks for local maxima within a small window is sufficient. For ECGs with noise and artefacts it ma ...
... In order to illustrate the dynamics of the RR-intervals obtained from this synthetic ECG, peak detection was used to identify the times of the R-peaks. In the noise-free case, a simple algorithm which looks for local maxima within a small window is sufficient. For ECGs with noise and artefacts it ma ...
Taquicardia de QRS largo em paciente com extrema
... T-waves. Patients with chronic renal failure often “tolerate” much higher serum potassium levels than patients with normal renal function. A serum potassium level of 7.3 mEq/L in a normal patient would likely produce a typical abnormal ECG. Yet, in this patient produced more subtle abnormalities in ...
... T-waves. Patients with chronic renal failure often “tolerate” much higher serum potassium levels than patients with normal renal function. A serum potassium level of 7.3 mEq/L in a normal patient would likely produce a typical abnormal ECG. Yet, in this patient produced more subtle abnormalities in ...
Normal electrocardiographic findings: recognising
... the sinus node with decreased automaticity resulting in a high prevalence of sinus bradycardia.16 17 In the absence of symptoms such as fatigue, dizziness or syncope, a heart rate ≥30 beats/min should be considered normal in a well-trained athlete. Sinus bradycardia disappears with an increase in he ...
... the sinus node with decreased automaticity resulting in a high prevalence of sinus bradycardia.16 17 In the absence of symptoms such as fatigue, dizziness or syncope, a heart rate ≥30 beats/min should be considered normal in a well-trained athlete. Sinus bradycardia disappears with an increase in he ...
cardiac potassium channel subtypes: new roles in repolarization
... thus performs ⬃100,000 successful and coordinated contractions every day. These contractions are controlled by electrical signals, known as action potentials, which trigger an intracellular signaling pathway referred to as the excitation-contraction coupling leading to the muscle contraction (41). T ...
... thus performs ⬃100,000 successful and coordinated contractions every day. These contractions are controlled by electrical signals, known as action potentials, which trigger an intracellular signaling pathway referred to as the excitation-contraction coupling leading to the muscle contraction (41). T ...
Catheter Ablation of Supraventricular and Ventricular Arrhythmias
... complete AV block. In posteroseptal epicardially located accessory pathways, where the ablation has to be performed from the coronary sinus, there is a risk of damage to the coronary artery or perforation of the venous system leading to cardiac tamponade.13 A Multicentre European Survey25 reported o ...
... complete AV block. In posteroseptal epicardially located accessory pathways, where the ablation has to be performed from the coronary sinus, there is a risk of damage to the coronary artery or perforation of the venous system leading to cardiac tamponade.13 A Multicentre European Survey25 reported o ...
Oral Anticoagulants in Atrial Fibrillation
... Atrial fibrillation (AF) is the most common abnormal heart rhythm and currently affects approximately 350,000 Canadians. Its incidence increases with age, so the number of patients affected is likely to increase as our population continues to age.1 o It affects approximately 1% of the general popu ...
... Atrial fibrillation (AF) is the most common abnormal heart rhythm and currently affects approximately 350,000 Canadians. Its incidence increases with age, so the number of patients affected is likely to increase as our population continues to age.1 o It affects approximately 1% of the general popu ...
Echocardiography in the Evaluation of a Hypertensive Patient: An
... diastolic dysfunction in hypertensive patients.34 Similarly, a newly introduced echocardiographic technique, tissue Doppler imaging has also shown that, in patients with hypertension and a normal ejection fraction, a significant reduction in the systolic tissue velocity of the long axis can be ident ...
... diastolic dysfunction in hypertensive patients.34 Similarly, a newly introduced echocardiographic technique, tissue Doppler imaging has also shown that, in patients with hypertension and a normal ejection fraction, a significant reduction in the systolic tissue velocity of the long axis can be ident ...
combination of shape-constrained and inflation deformable models
... We experimentally found that the mesh has some difficulties to reach the tip of the LAA, as illustrated by the sometimes low sensitivity shown on Fig. 4 ; but there are very few segmentation errors, with a good adaptation to the shape of the LAA, as described by the high PPV. We can observe one majo ...
... We experimentally found that the mesh has some difficulties to reach the tip of the LAA, as illustrated by the sometimes low sensitivity shown on Fig. 4 ; but there are very few segmentation errors, with a good adaptation to the shape of the LAA, as described by the high PPV. We can observe one majo ...
Pro: An Incidental PFO Should Be Repaired When Discovered
... frequently seen in association with a PFO. Paradoxical embolism is believed to be the likely mechanism of embolic events in patients with ASA, although other potential mechanisms of cardioembolism have been postulated, including thrombus formation within the ASA, supraventricular arrhythmias, and as ...
... frequently seen in association with a PFO. Paradoxical embolism is believed to be the likely mechanism of embolic events in patients with ASA, although other potential mechanisms of cardioembolism have been postulated, including thrombus formation within the ASA, supraventricular arrhythmias, and as ...
My title - rmib.somib.org.mx
... The results of CD analysis are shown in Table 2. Females had larger CD values than males, and participants with abnormal ECG had smaller values than those with normal ECG. There were no significant differences of CD values with respect to the time periods. HRV is an output signal from a complex nonl ...
... The results of CD analysis are shown in Table 2. Females had larger CD values than males, and participants with abnormal ECG had smaller values than those with normal ECG. There were no significant differences of CD values with respect to the time periods. HRV is an output signal from a complex nonl ...
A simple model of the right atrium of the human heart with the
... in the effective functioning of the cardiovascular system, both in the normal and in the arrhythmic state. Usually, the existing physiological models including cell membrane ion channels are too complex to allow to combine an investigation of long time dynamical properties of the heart rhythm with t ...
... in the effective functioning of the cardiovascular system, both in the normal and in the arrhythmic state. Usually, the existing physiological models including cell membrane ion channels are too complex to allow to combine an investigation of long time dynamical properties of the heart rhythm with t ...
PDF - Circulation: Arrhythmia and Electrophysiology
... AVNRT is the most common regular supraventricular tachycardia, and catheter-based SP modification has become the firstline treatment strategy with a high success rate. Distinguishing AVNRT from JT is important after SP modification.3,4 If the diagnosis is AVNRT, further SP modification is necessary ...
... AVNRT is the most common regular supraventricular tachycardia, and catheter-based SP modification has become the firstline treatment strategy with a high success rate. Distinguishing AVNRT from JT is important after SP modification.3,4 If the diagnosis is AVNRT, further SP modification is necessary ...
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.