Inappropriate sinus tachycardia diagnostic criteria: Difference between revisions
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Latest revision as of 15:26, 26 February 2013
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Inappropriate sinus tachycardia Microchapters |
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Differentiating Inappropriate Sinus Tachycardia from other Medical Conditions |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Diagnostic Criteria
No formal diagnostic criteria exist. A diagnosis of Inappropriate sinus tachycardia is primarily a diagnosis of exclusion and the following must be observed:
- Exclusion of all other causes of sinus tachycardia
- Common forms of supraventricular tachycardia (SVT) must be excluded
- Normal P wave morphology
- A resting sinus tachycardia is usually (but not always) present
- A nocturnal reduction in heart rate from over 100 beats per minute to 80 - 90 beats per minute
- There is an inappropriate heart rate response on exertion so that the heart rate accelerates to 140 - 150 beats per minute with minimal exertion.
- The mean heart rate during 24 hrs of monitoring is > 95 bpm
- Symptoms are documented to be due to tachycardia
- Hypotension may occasionally be observed
- Syncope (fainting) is occasionally reported