Titlebook: Interpretation of Cardiac Arrhythmias; Self-Assessment Appr Zainul Abedin,Robert Conner Book 2000 Springer Science+Business Media New York

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The Electrocardiogram,inoatrial node (. in Figure 1.1) lies at the junction of the superior vena cava (. in Figure 1.1) and the lateral wall of the right atrium. The node contains an estimated 5000 . capable of spontaneous depolarization; this aggregate functions as the heart’s primary pace-maker. The cells of the sinus

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The Atrial Arrhythmias,de or accessory atrioventricular connections play a role. The latter arrhythmias are discussed in Chapter 13. Four important tachyarrhythmias, namely, atrial fibrillation, atrial flutter, atrial tachycardia, and multifocal atrial tachycardia, are considered in this chapter, as are premature atrial c

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Multilevel Atrioventricular Block,the AV node and distal conduction structures are represented in laddergrams as a one-tiered structure. However, in the case of rapid atrial arrhythmias, as many as three consecutive levels of conduction delay, each with its own conduction characteristics, may be postulated to explain the observed at

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Sick Sinus Syndrome,f sinoatrial block, (3) sinus arrest, (4) tachycardia-bradycardia syndrome, (5) sinoatrial nodal suppression by ectopic beats, and (6) sinoatrial reentry. This group of arrhythmias is very often associated with other manifestations of conduction system disease, such as aytrioventricular, fascicular,

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Intraventricular Conduction Defects,ete bundle branch block were first formulated in the 1950s on the basis of animal studies by Demetrio Sodi-Pollares and his associates in Mexico City. In 1969, Mauricio Rosenbaum and his coworkers in Buenos Aires documented Wenckebach periods in the bundle branches on tracings obtained from humans,

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Escape and Capture,e sinoatrial node retains control of the cardiac rhythm because all the slower, subsidiary, pacemackers are passively depolarized and reset as the sinus impulse spreads throughout the conduction system. However, if sinus node impulse generation fails or if conduction of the sinus impulse blocks, the

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