Cardiology MCQ: Hypothermia for post op arrhythmia

Hypothermia for post op arrhythmia is used in case of: a) Complete heart block b) Atrial fibrillation c) Junctional ectopic tachycardia d) None of the above Correct answer: c) Junctional ectopic tachycardia Hypothermia for post op arrhythmia is used in case of junctional ectopic tachycardia (JET). JET is a unique postoperative arrhythmia, especially seen in children after surgery for congenital heart disease and it is often difficult to treat. It is likely to recur after cardioversion as it is due to enhanced automaticity. Sedation and cooling (hypothermia) are helpful. 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. Stress of the surgery with enhanced sympathetic tone and use of inotropic support are added factors. Delayed arrhythmia can occur due to scar related re-entry. Atrial fibrillation would be the commonest post op arrhythmia, not only in the setting of cardiac surgery, but also after noncardiac surgery. Its incidence increases as age increases. Perioperati...
Source: Cardiophile MD - Category: Cardiology Authors: Tags: Cardiology MCQ DM / DNB Cardiology Entrance ECG / Electrophysiology Source Type: blogs