Ver el código de «Multifocal atrial tachycardia»

==Background==
[[File:Multifocal Atrial Tachycardia.svg|thumb|Rhythm strip of multifocal atrial tachycardia.]]
*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]] / [[Theophylline toxicity]]
*[[Electrolyte abnormalities]]
*Other associations
**[[Valvular heart disease]]
**[[DM]]
**[[Acute renal failure]]
**Postoperative state
**[[Pulmonary embolism]]
**[[Pneumonia]]
**[[Anemia]]
**[[Digoxin toxicity]]

==Clinical Features==
*[[Palpitations]]
*[[Dyspnea]]
*[[Chest pain]]
*Presyncope/[[syncope]]

==Differential Diagnosis==
{{Tachycardia (narrow) DDX}}
{{Palpitations DDX}}

==Evaluation==
[[File:Multifocal atrial tachycardia - MAT.png|thumb|Multifocal atrial tachycardia]]
*[[ECG]]
**Irregular tachycardia (>100 bpm)
**At least 3 distinct p wave morphologies with different P-R intervals
**No dominant pacemaker site
*BMP, Magnesium
*Hemoglobin/hematocrit
*Consider infectious disease work up
*Consider [[ABG]]/[[VBG]]

==Management==
*Treat underlying cause
*Replace [[magnesium]]
*Replace [[potassium]]
*Increased AV nodal activity is unlikely to be effective
**[[Vagal maneuvers]] and [[adenosine]] may help reveal underlying rhythm/p-waves
**Can consider [[beta-blocker]] or [[calcium channel blocker]] in hemodynamically stable patient
***Use beta-blockers cautiously in patients with pulmonary disease
*[[Cardioversion]] ''not'' definitive
**MAT likely to recur if underlying etiology not addressed

==Disposition==
*Disposition depends on underlying illness, but often requires admission due to illness severity
*Poor prognostic sign when MAT develops during hospitalization or acute illness
**60% in-hospital mortality
***Due to illness, not arrhythmia
**Mean survival around 1 year

==See Also==
*[[Dysrhythmias]]

==External Links==

==References==
<references/>

[[Category:Cardiology]]