Supraventricular tachycardia history and symptoms: Difference between revisions
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*[[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 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. | *[[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. | ||
Revision as of 17:03, 14 January 2013
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Supraventricular tachycardia Microchapters |
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Differentiating Among the Different Types of Supraventricular Tachycardia |
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Differentiating Supraventricular Tachycardia from Ventricular Tachycardia |
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Diagnosis |
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Treatment |
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2015 ACC/AHA Guideline Recommendations |
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Case Studies |
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Supraventricular tachycardia history and symptoms On the Web |
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American Roentgen Ray Society Images of Supraventricular tachycardia history and symptoms |
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Supraventricular tachycardia history and symptoms in the news |
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Directions to Hospitals Treating Supraventricular tachycardia |
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Risk calculators and risk factors for Supraventricular tachycardia history and symptoms |
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:
- Anxiety
- Chest pain or sensation of tightness
- Dizziness, or lightheadedness (near-faint), or fainting
- Lightheadedness
- Palpitations (the sensation of the heart racing, fluttering or pounding strongly in the chest or the carotid arteries)
- Shortness of breath
- Syncope in cases of AVNRT
- Sweating
- 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 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.