Articles: postoperative-complications.
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Atrial fibrillation and atrial flutter are common arrhythmias after coronary artery bypass grafting. Although the consequences of the arrhythmia are generally not life-threatening, it constitutes a major clinical problem often requiring conversion to sinus rhythm. ⋯ This article reviews the literature on epidemiology, electrophysiology, risk factors, and preventive trials. The major conclusions are: (1) In patients undergoing coronary artery bypass surgery, the incidence of postoperative atrial fibrillation or flutter is 20-30%, the peak incidence being on the second or third postoperative day. (2) The strongest independent preoperative predictor for atrial fibrillation or flutter is the patients' age. (3) Intra-atrial conduction delay recorded pre and peroperatively may predict development of atrial fibrillation. (4) Peroperative inducibility of atrial fibrillation by pacing the right atrium may identify patients at risk for postoperative atrial fibrillation. (5) Development of postoperative atrial fibrillation or flutter has not been associated with peroperative or postoperative events. (6) The specificity and sensitivity of age and other possible relevant factors for prediction of atrial fibrillation or flutter after coronary artery bypass grafting is low. (7) No effective prophylactic regimen has yet been established.
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Persistent low back pain after surgery can be a severe diagnostic and therapeutic problem. By using MRI many causes of this failed back surgery syndrome (FBSS) can be disclosed. MRI is superior to other imaging modalities in this concern. In this article we describe the MR technique, normal and abnormal findings of the postoperative lumbar spine, such as persistent or recurrent disc herniation, epidural scar, spinal stenosis, pseudomeningocele, arachnoiditis, pseudarthrosis, hematoma, and infection.
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Peri-operative cardiac events are the leading cause of death following anaesthesia and surgery. We attempt to put into perspective the various methods of pre-operative assessment of patients at risk, and suggest a logical sequence for the use of potentially costly investigations such as 12-lead ECG, exercise stress ECG, ambulatory ECG monitoring, myocardial perfusion imaging, radionuclide ejection fraction, and coronary angiography. Important principles are given for the management of patients at risk of peri-operative cardiac incidents if the decision is made to proceed with non-cardiac surgery despite the potential risk or because of inoperable coronary disease.