Echocardiography In Acute Stroke - A Precious Resource

Abstract

Background Echocardiography (Echo) is frequently utilized as part of the work up for ischemic stroke. National guidelines suggest using echo to assess for source of unexplained stroke “if detection of a structural cardiac abnormality would prompt a change of management”. This study aims to describe the use of Echocardiography post-stroke in Mayo University Hospital (MUH). Methods The study population was derived from a list of strokes admitted to MUH from July to December 2023 which was compiled by the Stroke ANP. The radiology system was consulted to assess time to echo and findings. Results 86 ischemic strokes were identified. 77 (89%) had echocardiography ordered as inpatient. 61 of 77 echoes ordered were filmed during admission. The mean wait for echo was 6.4 days. No PFO or LV thrombus was detected. In 52% (n=32) of echo’s performed for work up of aetiology of stroke there was no mention of intra-atrial septum (IAS) in the report. 24% had Modified Rankin Scale on discharge of 4 or above. Of these, 75% had echo ordered as inpatient despite 60% already having atrial fibrillation diagnosed. Conclusion Echocardiography appeared to be an over-utilised resource in ischemic strokes in MUH. The vast majority of patients with stroke, even if frail, elderly, or severely disabled, had echocardiography ordered despite national guidelines suggesting usage of echo only when diagnosis of structural heart disease was likely to change management. The intra-atrial septum wasn’t even mentioned in the majority of studies. The wait for echocardiography appears to be extending bed days for patients putting strain on hospital inpatient capacity and emergency departments. A more nuanced approach to ordering echo in the setting of acute stroke could be advocated for, this will take a collaborative effort between Cardiology and Stroke Medicine in order to prioritise that will most benefit from this precious resource.