Supraventricular tachycardia history and symptoms: Difference between revisions

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*[[Syncope]] in cases of [[AVNRT]]
*[[Syncope]] in cases of [[AVNRT]]
*[[Sweating]]
*[[Sweating]]
*Sinoatrial node reentrant tachycardia (SANRT) is caused by a [[cardiac arrhythmia#origin of impulse|reentry]] circuit localized to the SA node, resulting in a normal-morphology P wave that falls before a regular, narrow QRS complex. It is therefore impossible to distinguish on the EKG from ordinary sinus tachycardia.  It may however be distinguished by its prompt response to [[supraventricular tachycardia#physical maneuvers|vagal maneuvers]].
*(Unifocal) Atrial tachycardia is tachycardia resultant from one ectopic foci within the atria, distinguished by a consistent P wave of abnormal morphology that fall before a narrow, regular QRS complex.
*[[Multifocal atrial tachycardia]] ([[MAT]]) is tachycardia resultant from at least three ectopic foci within the atria, distinguished by P waves of at least three different morphologies that all fall before regular, narrow QRS complexes.
*[[Atrial fibrillation]] is not, in itself, a tachycardia, but when it is associated with a rapid ventricular response greater than 100 beats per minute, it becomes a tachycardia. A-fib is characteristically an "irregularly irregular rhythm" both in its atrial and ventricular depolarizations. It is distinguished by fibrillatory P waves that, at some point in their chaos, stimulate a response from the ventricles in the form of irregular, narrow QRS complexes.
*[[Atrial flutter]], is caused by a re-entry rhythm in the atria, with a regular rate of about 300 beats per minute.  On the EKG, this appears as a line of "sawtooth" P waves.  The AV node will not usually conduct such a fast rate, and so the P:QRS usually involves a 2:1 or 4:1 block pattern, (though rarely 3:1, and most rarely and sometimes fatally 1:1). Because the ratio of P to QRS is usually consistent, A-flutter is often regular in comparison to its irregular counterpart, A-fib. Atrial Flutter is also not necessarily a tachycardia unless the AV node permits a ventricular response greater than 100 beats per minute.
*Junctional Ectopic Tachycardia or JET is a rare tachycardia caused by increased [[cardiac arrhythmia#origin of impulse|automaticity]] of the AV node itself initiating frequent heart beats. On the EKG, junctional tachycardia often presents with abnormal morphology P waves that may fall anywhere in relation to a regular, narrow QRS complex.


==References==
==References==

Latest revision as of 17:05, 14 January 2013

Supraventricular tachycardia Microchapters

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Overview

Historical Perspective

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Differentiating Among the Different Types of Supraventricular Tachycardia

Differentiating Supraventricular Tachycardia from Ventricular Tachycardia

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Acute Treatment of SVT of Unknown Mechanism
Ongoing Management of SVT of Unknown Mechanism
Ongoing Management of IST
Acute Treatment of Suspected Focal Atrial Tachycardia
Acute Treatment of Multifocal Atria Tachycardia
Ongoing Management of Multifocal Atrial Tachycardia
Acute Treatment of AVNRT
Ongoing Management of AVNRT
Acute Treatment of Orthodromic AVRT
Ongoing Management of Orthodromic AVRT
Asymptomatic Patients With Pre-Excitation
Management of Symptomatic Patients With Manifest Accessory Pathways
Acute Treatment of Atrial Flutter
Ongoing Management of Atrial Flutter
Acute Treatment of Junctional Tachycardia
Ongoing Management of Junctional Tachycardia
Acute Treatment of SVT in ACHD Patients
Ongoing Management of SVT in ACHD Patients
Acute Treatment of SVT in Pregnant Patients
Acute Treatment and Ongoing Management of SVT in Older Population

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Symptoms

Symptoms that are common to all types of SVT include the following:

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