multifocal (chaotic) atrial tachycardia (MAT)
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Etiology
- hypoxia - COPD, heart failure, hypertension
- increased catecholamines
- atrial stretch
- local acid base & electrolyte disturbances
- may be potentiated by theophylline
Diagnostic procedures
- electrocardiogram:
- rate 100-130 bpm
- variation in p - p intervals
- at least 3 distinct p-wave morphologies
Management
- correction of underlying cause
- pharmacologic agents
- Ca+2 channel blocker (verapamil, diltiazem)
- beta blocker
- avoid in patients with CHF or lung disease
- amiodarone
- digitalis is NOT useful & may worsen
- NO DC cardioversion[4]
More general terms
Additional terms
References
- ↑ Manual of Medical Therapeutics, 28th ed, Ewald & McKenzie (eds), Little, Brown & Co, Boston, 1995, pg 141-42
- ↑ Saunders Manual of Medical Practice, Rakel (ed), WB Saunders, Philadelphia, 1996, pg 273
- ↑ Mayo Internal Medicine Board Review, 1998-99, Prakash UBS (ed) Lippincott-Raven, Philadelphia, 1998, pg 76
- ↑ 4.0 4.1 ACLS - The Reference Texbook ACLS: Principles & Practice, Cummins RO et al (eds), American Heart Association, 2003 ISBN 0-87493-341-2
- ↑ 5.0 5.1 Medical Knowledge Self Assessment Program (MKSAP) 19 Board Basics. An Enhancement to MKSAP19. American College of Physicians, Philadelphia 2022