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Atrial Contraction Case Study

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NEW ONSET ATRIAL FIBRILLATION IN A NON-CARDIAC SURGICAL PATIENT
Atrial fibrillation (AF) is the commonest arrhythmia. It is characterised by disorganised random electrical activity in the atria that results in a lack of effective atrial contraction. It is associate with a five-fold risk of stroke and a three-fold incidence of congestive heart failure, and overall higher mortality. There are many known risk factors for the development of acute AF including coronary artery disease (CAD), hypertension and valvular heart disease but AF may occur in the absence of any underlying cardiac or non-cardiac disease . As its incidence increases with age and with the ageing of western populations it is becoming ever more common in surgical patients.
CASE …show more content…

Shortly after the induction agent was given the patient became bradycardic (38 bpm) and hypotensive (75/36) for which he was given one bolus of atropine and one bolus of ephedrine. The rhythm then changed to a supraventricular bigemony with a rate of 120 bpm which continued in to the start of the operation with a rate between 130 and 150 bpm and a rhythm alternating between sinus, bigemonic and atrial fibrillation (AF). He remained in atrial tachycardia during the operation despite the attempted correction of possible causes through the intraoperative administration of fluids, peripheral vasoconstrictors and strong opioids, and the attempted correction of electrolyte …show more content…

These tools use known stroke risk factors to predict the patient’s annual risk of stroke and artificially divide patients into low, intermediate and high risk categories3. High risk groups should be started on long-term oral anticoagulant therapy. Traditionally this was with a Vitamin K antagonist (VKA) such as Wafarin but new oral anticoagulants such as Dabigatran have been shown to be non-inferior to VKA for the prevention of stroke and systemic embolization with similar rates of major haemorrhage in randomised controlled trials3. Bleeding risk also needs to be taken into account before starting

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