Supraventricular arrhythmias after myocardial infarction
- Philip J Podrid, MD, FACC
Philip J Podrid, MD, FACC
- Professor of Medicine, Professor of Pharmacology and Experimental Therapeutics
- Boston University School of Medicine
- Lecturer, Harvard Medical School
- Section Editors
- Brian Olshansky, MD
Brian Olshansky, MD
- Section Editor — Cardiac Arrhythmias
- Adjunct Professor of Medicine
- Des Moines University
- Bernard J Gersh, MB, ChB, DPhil, FRCP, MACC
Bernard J Gersh, MB, ChB, DPhil, FRCP, MACC
- Editor-in-Chief — Cardiovascular Medicine
- Section Editor — Coronary Heart Disease; Myopericardial Disease
- Professor of Medicine
- Mayo Clinic College of Medicine
- James Hoekstra, MD
James Hoekstra, MD
- Section Editor — Adult Cardiology Emergencies
- Professor and Fredrick Glass Chair
- Wake Forest University
Supraventricular arrhythmias, other than atrial fibrillation or flutter, are relatively uncommon in the periinfarction period. Their occurrence often indicates myocardial dysfunction and they may, by themselves, cause congestive heart failure or exacerbate ongoing myocardial ischemia.
The incidence, mechanism, and treatment of supraventricular arrhythmias (particularly sinus bradycardia, sinus tachycardia, and atrial fibrillation) occurring after myocardial infarction (MI) will be reviewed here. The following related topics are discussed separately: conduction disturbances after MI, pathophysiology of ventricular arrhythmias during MI, the clinical characteristics and treatment of ventricular arrhythmias with MI, and risk stratification of patients after MI.
●It is frequently seen with inferior wall infarctions, since the right coronary artery supplies the sinoatrial node (SA) in approximately 60 percent of people.
●It is most often transient, particularly for sinus bradycardia occurring within the first six hours; such arrhythmias typically resolve within 24 hours.
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