Treatment of Stable Narrow-Complex Tachycardia
Regular Rhythm:
 • Attempt vagal maneuvers
 • Give adenosine 6 milligrams IV push followed by 12 milligrams IV push if does not convert
     - Repeat 12-milligram dose once
 • Converts - Probably AVnRT or AVRT
    - Observe and monitor
    - Repeat adenosine if returns
    - Control rate with AV nodal blocking agents (diltiazem or B-blockers)
 • Does not convert - Possible atrial flutter, ectopic atrial tachycardia, junctional tachycardia 
    - Control rate (e.g., diltiazem or B-blockers, use B-blockers with caution in pulmonary disease or CHF)
    - Treat underlying cause
Irregular Rhythm:
 • Probable atrial fibrillation or possible atrial flutter or MAT
    - Control rate (e.g., diltiazem or B-blockers, use B-blockers with caution in pulmonary disease or CHF)
    - Treat underlying cause

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