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Post Cardiac Surgery Arrhythmias

Postoperative cardiac arrhythmias are a major cause of morbidity and mortality, more so following surgery for congenital heart disease. Tolerability of arrhythmia is less in the postoperative period than for similar arrhythmia in the preoperative period. Hemodynamic instability is more likely due to the possibility of myocardial dysfunction. Cardiopulmonary bypass, injury to the conduction system during surgery, metabolic and electrolyte abnormalities, especially hypokalemia and hypomagnesemia contribute to the increased incidence of postoperative arrhythmias.