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... The reason of using the drugs in present study at the same dose and same route of administration is to detect the difference in the effect by the drug itself (7). In salbutamol group and when salbutamol used alone at the second day; it caused a highly significant (P<0.01) increase in the heart rate ...
... The reason of using the drugs in present study at the same dose and same route of administration is to detect the difference in the effect by the drug itself (7). In salbutamol group and when salbutamol used alone at the second day; it caused a highly significant (P<0.01) increase in the heart rate ...
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... Background and Purpose—Left ventricular hypertrophy (LVH) is a risk factor for cardiovascular events, but its effect on ischemic stroke risk is established mainly in whites. The effect of LV geometry on stroke risk has not been defined. The aim of the present study was to evaluate whether LVH and LV ...
... Background and Purpose—Left ventricular hypertrophy (LVH) is a risk factor for cardiovascular events, but its effect on ischemic stroke risk is established mainly in whites. The effect of LV geometry on stroke risk has not been defined. The aim of the present study was to evaluate whether LVH and LV ...
Embolic Strokes of Undetermined Source in the Athens Stroke
... and (c) any other specific cause of stroke (eg, arteritis, dissection, migraine/vasospasm, drug misuse).3 Major risk sources of cardioembolism included permanent or paroxysmal AF, sustained atrial flutter, intracardiac thrombus, prosthetic cardiac valve, atrial myxoma or other cardiac tumours, mitra ...
... and (c) any other specific cause of stroke (eg, arteritis, dissection, migraine/vasospasm, drug misuse).3 Major risk sources of cardioembolism included permanent or paroxysmal AF, sustained atrial flutter, intracardiac thrombus, prosthetic cardiac valve, atrial myxoma or other cardiac tumours, mitra ...
online supplement
... Wistar rats (Charles River, Saint-Constant, QC, Canada) were randomly assigned to sedentary (Sed) or intensive-exercise (Ex) groups. The exercise program has been previously described (1). Ex-rats underwent daily running training sessions on a treadmill. The treadmill had different lanes to serve as ...
... Wistar rats (Charles River, Saint-Constant, QC, Canada) were randomly assigned to sedentary (Sed) or intensive-exercise (Ex) groups. The exercise program has been previously described (1). Ex-rats underwent daily running training sessions on a treadmill. The treadmill had different lanes to serve as ...
Diagnosis and Management of Common Types of
... tachycardia, and atrial tachycardia. Most persons with these tachyarrhythmias have structurally normal hearts. Sudden onset of an accelerated heart rate can cause palpitations, light-headedness, chest discomfort, anxiety, dyspnea, or fatigue. The history is important to elicit episodic symptoms beca ...
... tachycardia, and atrial tachycardia. Most persons with these tachyarrhythmias have structurally normal hearts. Sudden onset of an accelerated heart rate can cause palpitations, light-headedness, chest discomfort, anxiety, dyspnea, or fatigue. The history is important to elicit episodic symptoms beca ...
Laser catheter-induced atrioventricular nodal delays and
... this dog, the development of complete heart block and transition from I: I to third degree A V block was not accompanied by asystole since the junctional rhythm escaped without any delay (Fig. 2). The initial cycle length of the escape junctional pacemaker was 740 ms, which gradually lengthened to 1 ...
... this dog, the development of complete heart block and transition from I: I to third degree A V block was not accompanied by asystole since the junctional rhythm escaped without any delay (Fig. 2). The initial cycle length of the escape junctional pacemaker was 740 ms, which gradually lengthened to 1 ...
Clinical Information
... signal distortion. If ECG signal distortion is severe it may be necessary to select another lead or reposition the ECG electrodes. Once you have done all things possible to reduce the interference, adjust the current until capture is recognized. Monitoring the externally paced patient Patients who a ...
... signal distortion. If ECG signal distortion is severe it may be necessary to select another lead or reposition the ECG electrodes. Once you have done all things possible to reduce the interference, adjust the current until capture is recognized. Monitoring the externally paced patient Patients who a ...
Electrocardiography of arrhythmias: From deductive analysis
... impulse or transseptal activation occurs prematurely, the right bundle branch may not be refractory and the impulse will propagate normalIy. In the electrocardiogram in Figure 4, this critical relation is altered by the Wenckebach pattern of conduction which results in a gradual foreshortening of th ...
... impulse or transseptal activation occurs prematurely, the right bundle branch may not be refractory and the impulse will propagate normalIy. In the electrocardiogram in Figure 4, this critical relation is altered by the Wenckebach pattern of conduction which results in a gradual foreshortening of th ...
Electrocardiographic effects of myocardial ischemia induced
... Two died suddenly during the third week; the others remained overtly healthy. Atrial pacing to rates of over 210 beats/min was achieved in all eight surviving dogs at 1, 2 and 3 weeks postoperatively. None developed spontaneous or pacing-induced intraventricular conduction defects. Single lead recor ...
... Two died suddenly during the third week; the others remained overtly healthy. Atrial pacing to rates of over 210 beats/min was achieved in all eight surviving dogs at 1, 2 and 3 weeks postoperatively. None developed spontaneous or pacing-induced intraventricular conduction defects. Single lead recor ...
Abstract
... baseline SBP ≤ or > 25th percentile value of 164 mm Hg during 4.8±0.9 years follow-up in 7998 non-diabetic hypertensive patients with ECG left ventricular hypertrophy randomly assigned to losartan- or atenolol-based treatment. Average ontreatment SBP <142 (lowest tertile) and average SBP 142 to <152 ...
... baseline SBP ≤ or > 25th percentile value of 164 mm Hg during 4.8±0.9 years follow-up in 7998 non-diabetic hypertensive patients with ECG left ventricular hypertrophy randomly assigned to losartan- or atenolol-based treatment. Average ontreatment SBP <142 (lowest tertile) and average SBP 142 to <152 ...
Advances in Arrhythmia and Electrophysiology
... Baseball is the most common sport in which commotio occurs. Nearly all commotio events are caused by direct baseball strikes to the left chest wall over the cardiac silhouette. Pitchers, catchers, and batters have the highest incidence of commotio cordis, likely because of the frequency of chest wal ...
... Baseball is the most common sport in which commotio occurs. Nearly all commotio events are caused by direct baseball strikes to the left chest wall over the cardiac silhouette. Pitchers, catchers, and batters have the highest incidence of commotio cordis, likely because of the frequency of chest wal ...
ABC of clinical electrocardiography Broad complex tachycardia—Part I
... It is important to scrutinise the tracings from all 12 leads of the electrocardiogram, as P waves may be evident in some leads but not in others ...
... It is important to scrutinise the tracings from all 12 leads of the electrocardiogram, as P waves may be evident in some leads but not in others ...
Supraventricular Tachycardia
... Abrupt onset of paroxysmal, Signs of left ventricular irregular palpitations; symphypertrophy; nonspetoms sometimes persistent cific repolarization aband occasionally mild or normalities common ...
... Abrupt onset of paroxysmal, Signs of left ventricular irregular palpitations; symphypertrophy; nonspetoms sometimes persistent cific repolarization aband occasionally mild or normalities common ...
Supraventricular Tachycardia - UCSF Department of Anesthesia and
... Abrupt onset of paroxysmal, Signs of left ventricular irregular palpitations; symphypertrophy; nonspetoms sometimes persistent cific repolarization aband occasionally mild or normalities common ...
... Abrupt onset of paroxysmal, Signs of left ventricular irregular palpitations; symphypertrophy; nonspetoms sometimes persistent cific repolarization aband occasionally mild or normalities common ...
Development of the Pacemaker Tissues of the Heart
... Figure 1. Schematic overview of heart development in higher vertebrates. A, The early heart tube has a primitive phenotype (gray) and sinusoidal ECG. Chamber myocardium (blue) expands from the outer curvatures of the primary heart tube, whereas nonchamber myocardium (gray) of the sinus venosus (sv), ...
... Figure 1. Schematic overview of heart development in higher vertebrates. A, The early heart tube has a primitive phenotype (gray) and sinusoidal ECG. Chamber myocardium (blue) expands from the outer curvatures of the primary heart tube, whereas nonchamber myocardium (gray) of the sinus venosus (sv), ...
Cardiac Murmurs
... disturbance that occurs as the valve area is reduced from 3 to 4 cm2 to 1.5 to 2 cm2. However, an additional reduction in t he valve area from half its normal size to a quarter of it’s normal size produces severe obstruction to flow and progressive pressure overload on the left ventricle. ...
... disturbance that occurs as the valve area is reduced from 3 to 4 cm2 to 1.5 to 2 cm2. However, an additional reduction in t he valve area from half its normal size to a quarter of it’s normal size produces severe obstruction to flow and progressive pressure overload on the left ventricle. ...
Ventricular Tachycardia
... Can occur at any rate The rhythm is irregular because of the early beat but is regular at other times All intervals can be within normal limits There is a P for every QRS and a QRS for every P The P waves all look the same except the P in front of the PAC will be different ...
... Can occur at any rate The rhythm is irregular because of the early beat but is regular at other times All intervals can be within normal limits There is a P for every QRS and a QRS for every P The P waves all look the same except the P in front of the PAC will be different ...
Sympathetic Innervation Alters Growth and Intrinsic Heart Rate of
... of newborn rat hearts through a bolus injection of isoproterenol inhibits further cell division and DNA synthesis,4 suggesting that catecholamine stimulation of the developing heart may influence its mechanism of growth. In hearts which have made the transition to growth by hypertrophy, isoprotereno ...
... of newborn rat hearts through a bolus injection of isoproterenol inhibits further cell division and DNA synthesis,4 suggesting that catecholamine stimulation of the developing heart may influence its mechanism of growth. In hearts which have made the transition to growth by hypertrophy, isoprotereno ...
NEW Bradycardia Booklet - April 2010.indd
... In Syncope there are many causes of syncope, some common and some rare. Most cases of syncope are due to the ‘common’ faint. However, other impor tant causes include defects of the ‘wiring’ of the hear t. Syncope can occur when the hear t slows or momentarily stops (asystole). Therefore oxygenated b ...
... In Syncope there are many causes of syncope, some common and some rare. Most cases of syncope are due to the ‘common’ faint. However, other impor tant causes include defects of the ‘wiring’ of the hear t. Syncope can occur when the hear t slows or momentarily stops (asystole). Therefore oxygenated b ...
His Bundle Electrocardiography
... ventricular depolarization. In some of the anomalous complexes a His spike could be recorded just prior to the inscription of the local ventricular electrogram, but after the onset of the QRS complex (fig. 3). Despite the presence of digitalis excess, the ventricular response to the fibrillating atr ...
... ventricular depolarization. In some of the anomalous complexes a His spike could be recorded just prior to the inscription of the local ventricular electrogram, but after the onset of the QRS complex (fig. 3). Despite the presence of digitalis excess, the ventricular response to the fibrillating atr ...
AHA/ACC/HR Guideline for the Management of Patients with Atrial
... A recommendation with Level of Evidence B or C does not imply that the recommendation is weak. Many important clinical questions addressed in the guidelines do not lend themselves to clinical trials. Although randomized trials are unavailable, there may be a very clear clinical consensus that a part ...
... A recommendation with Level of Evidence B or C does not imply that the recommendation is weak. Many important clinical questions addressed in the guidelines do not lend themselves to clinical trials. Although randomized trials are unavailable, there may be a very clear clinical consensus that a part ...
Full Text
... A healthy 15-year-old male patient presented with a 6-month history of recurrent attacks of palpitations. On multiple emergency room visits, a sustained wide QRS complex tachycardia with a right bundle branch block and northwest axis deviation was documented. The tachycardia was not terminated by in ...
... A healthy 15-year-old male patient presented with a 6-month history of recurrent attacks of palpitations. On multiple emergency room visits, a sustained wide QRS complex tachycardia with a right bundle branch block and northwest axis deviation was documented. The tachycardia was not terminated by in ...
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... NICE guidance on the management of atrial fibrillation recommends offering people a personalised care package of information and prompt referral for specialised management if treatment fails to control symptoms at any stage. Recommended interventions include anticoagulation medications to reduce the ...
... NICE guidance on the management of atrial fibrillation recommends offering people a personalised care package of information and prompt referral for specialised management if treatment fails to control symptoms at any stage. Recommended interventions include anticoagulation medications to reduce the ...
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.