Multifocal atrial tachycardia: Difference between revisions

(MAT)
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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
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<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

  • COPD
  • CHF
  • Sepsis
  • Methylxanthine toxicity
  • Electrolyte abnormalities

Clinical Features

Multifocal atrial tachycardia

Differential Diagnosis

Palpitations

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