Sick sinus syndrome electrocardiogram: Difference between revisions
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Electrocardiogram shown below is recorded in a middle-aged woman treated for [[atrial fibrillation]]. The patient was doing well when this [[electrocardiogram]] was taken, and was taking [[digoxin]] and [[flecainide]] . The [[electrocardiogram]] shows an irregular rhythm which appears to be sinus. The grouping of the [[QRS]] complexes suggests a [[Mobitz type I AV block]]. In this case though, no [[AV block]] is seen and this may represent a '''[[sinus node exit block]]'''. | |||
[[Image:Sinus node exit block.jpg|center| | [[Image:Sinus node exit block.jpg|center|500px]] | ||
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This is a recording from a middle aged woman with recurrent atrial fibrillation. She was treated with flecainide with some improvement of her symptoms. The above is a recording taken in the cardiac clinic. It shows group beating with sinus rhythm. There are missing P waves. This suggests that there is sinus node arrest or that this is sinus node exit block. | |||
[[Image:Sanodearrest.jpg|center|500px]] | |||
==References== | ==References== | ||
Revision as of 17:42, 15 October 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Electrocardiogram
Ambulatory monitoring of the electrocardiogram (ECG) may be necessary because arrhythmias are transient. The ECG may show any of the following
- Inappropriate sinus bradycardia
- Sinus arrest
- Sinoatrial block
- Atrial fibrillation with slow ventricular response
- A prolonged asystolic period after a period of tachycardias
- Atrial flutter
- Ectopic atrial tachycardia
- Sinus node reentrant tachycardia
Electrophysiologic tests are no longer used for diagnostic purposes because of their low specificity and sensitivity. Cardioinhibitory and vasodepressor forms of sick sinus syndrome may be revealed by tilt table testing.
Electrocardiogram shown below is recorded in a middle-aged woman treated for atrial fibrillation. The patient was doing well when this electrocardiogram was taken, and was taking digoxin and flecainide . The electrocardiogram shows an irregular rhythm which appears to be sinus. The grouping of the QRS complexes suggests a Mobitz type I AV block. In this case though, no AV block is seen and this may represent a sinus node exit block.
This is a recording from a middle aged woman with recurrent atrial fibrillation. She was treated with flecainide with some improvement of her symptoms. The above is a recording taken in the cardiac clinic. It shows group beating with sinus rhythm. There are missing P waves. This suggests that there is sinus node arrest or that this is sinus node exit block.
