Recurrent Ventricular Tachycardia

Jun 30, 2016 by in CARDIOLOGY Comments Off on Recurrent Ventricular Tachycardia

Recurrent Ventricular Tachycardia This chapter will be divided into discrete sections: (a) definitions; (b) pathophysiologic substrates and mechanisms of tachycardias; and (c) electrophysiologic studies (EPS)—modes of initiation, response to stimulation,…

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Preexcitation Syndromes

Jun 30, 2016 by in CARDIOLOGY Comments Off on Preexcitation Syndromes

Preexcitation Syndromes Preexcitation exists when, in relation to atrial events, all or some part of the ventricular muscle is activated by the atrial impulse sooner than would be expected if…

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Supraventricular Tachycardias

Jun 30, 2016 by in CARDIOLOGY Comments Off on Supraventricular Tachycardias

Supraventricular Tachycardias The development and refinement of the techniques of intracardiac recording and programmed stimulation, and our ability to compare these findings with experimental models, have resulted in a greater…

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Evaluation of Antiarrhythmic Agents

Jun 30, 2016 by in CARDIOLOGY Comments Off on Evaluation of Antiarrhythmic Agents

Evaluation of Antiarrhythmic Agents The application of recording and stimulation techniques has made it possible to evaluate the electrophysiologic effects and preferential sites of action of the entire spectrum of…

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Atrial Flutter and Fibrillation

Jun 30, 2016 by in CARDIOLOGY Comments Off on Atrial Flutter and Fibrillation

Atrial Flutter and Fibrillation Atrial fibrillation and its cousin, atrial flutter (typical and atypical), are the most common arrhythmias with which we must deal clinically, yet they are the group…

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Intraventricular Conduction Disturbances

Jun 30, 2016 by in CARDIOLOGY Comments Off on Intraventricular Conduction Disturbances

Intraventricular Conduction Disturbances Intraventricular conduction disturbances are the result of abnormal activation of the ventricles. Normal ventricular activation requires the synchronized participation of the distal components of the atrioventricular (A-V)…

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Ectopic Rhythms and Premature Depolarizations

Jun 30, 2016 by in CARDIOLOGY Comments Off on Ectopic Rhythms and Premature Depolarizations

Ectopic Rhythms and Premature Depolarizations Ectopic depolarizations can arise from many areas of the heart, but the surface ECG is markedly limited in its ability to precisely define the origin…

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Atrioventricular Conduction

Jun 30, 2016 by in CARDIOLOGY Comments Off on Atrioventricular Conduction

Atrioventricular Conduction The usefulness of intracardiac recording and stimulation techniques in humans was first realized during its application to patients with disorders of atrioventricular (A-V) conduction. Electrophysiologic study allowed confirmation…

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