Multifocal atrial tachycardia: Difference between revisions
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==Background== | ==Background== | ||
*Multiple (3 or more) ectopic foci in the atria causing an irregular atrial tachycardia | |||
*Increased automaticity due to causes listed below | |||
===Causes=== | ===Causes=== | ||
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*[[Sepsis]] | *[[Sepsis]] | ||
*Methylxanthine toxicity | *Methylxanthine toxicity | ||
*Electrolyte abnormalities | |||
==Clinical Features== | ==Clinical Features== | ||
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==Differential Diagnosis== | ==Differential Diagnosis== | ||
{{Palpitations DDX}} | |||
==Workup== | ==Workup== | ||
*[[ECG]] | |||
*Irregular tachycardia (>100 bpm) | |||
*At least 3 distinct p wave morphologies | |||
*No dominant pacemaker site | |||
==Management== | ==Management== | ||
*Treat the underlying cause | |||
*Increased AV nodal activity is unlikely to be effective | |||
**Vagal maneuvers and adenosine may help reveal underlying rhythm/p-waves | |||
**Cardioversion not definitive, likely recurrence if underlying illness not addressed | |||
==Disposition== | ==Disposition== | ||
*Disposition depends on the underlying illness, but often requires admission due to illness severity/age | |||
*Poor prognostic sign when developed during hospitalization/illness | |||
**60% in hospital mortality | |||
**mean survival around 1 year | |||
**Due to illness not arrhythmia | |||
==See Also== | ==See Also== | ||
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==Sources== | ==Sources== | ||
*Rosen's | |||
*Burns, E. Multifocal Atrial Tachycardia [Web log post]. Retrieved April, 29, 2015, from http://lifeinthefastlane.com | |||
<references/> | <references/> | ||
[[Category:Cards]] | [[Category:Cards]] |
Revision as of 20:53, 28 April 2015
Background
- Multiple (3 or more) ectopic foci in the atria causing an irregular atrial tachycardia
- Increased automaticity due to causes listed below
Causes
Clinical Features
Differential Diagnosis
Palpitations
- Arrhythmias:
- Non-arrhythmic cardiac causes:
- Psychiatric causes:
- Drugs and Medications:
- Alcohol
- Caffeine
- Drugs of abuse (e.g. cocaine)
- Medications (e.g. digoxin, theophylline)
- Tobacco
- Misc
Workup
- ECG
- Irregular tachycardia (>100 bpm)
- At least 3 distinct p wave morphologies
- No dominant pacemaker site
Management
- Treat the underlying cause
- Increased AV nodal activity is unlikely to be effective
- Vagal maneuvers and adenosine may help reveal underlying rhythm/p-waves
- Cardioversion not definitive, likely recurrence if underlying illness not addressed
Disposition
- Disposition depends on the underlying illness, but often requires admission due to illness severity/age
- Poor prognostic sign when developed during hospitalization/illness
- 60% in hospital mortality
- mean survival around 1 year
- Due to illness not arrhythmia
See Also
External Links
Sources
- Rosen's
- Burns, E. Multifocal Atrial Tachycardia [Web log post]. Retrieved April, 29, 2015, from http://lifeinthefastlane.com