An overlooked cause in a patient with recurrent ischemic stroke: A case report. Issue 13 (March 2018)

• Record Type: Journal Article
• Authors: Yang, Xunzhe; Liu, Mingsheng; Zhu, Yicheng; Zhang, Xiaobo; Gao, Shan; Ni, Jun
• Other Names: NA. section editor.
• Is Part Of: Medicine. Volume 97:Issue 13(2018)
• Publication Date: 2018-03
• Subjects: ateriovenous malformation -- stroke -- transcranial doppler ultrasound; Medicine -- Periodicals; Medicine -- Periodicals; Médecine -- Périodiques; Geneeskunde; Medicine; Periodicals; Periodicals; 610.5
• DOI: 10.1097/MD.0000000000010146
• Languages: English
• ISSNs: 0025-7974

Abstract

Abstract: Rationale: The majority of ischemic strokes are due to cardioembolism, large vessel atherothromboembolism, small vessel occlusive disease, or other unusual mechanisms. In most clinical settings, many strokes without a well-defined etiology requires a thorough diagnostic evaluation, otherwise the underlying cause might be easily overlooked. Here we report on the rare cause of a patient with recurrent stroke. Patient concerns: A 50-year-old female patient had a 4-year history of recurrent acute onset of neurological deficits. Diagnoses: Contrast transcranial Doppler ultrasound detected a typical "curtain" appearance of microbubbles, indicative of a right-to-left shunt. Computed tomography pulmonary angiogram was then initiated and a pulmonary arteriovenous malformation (PAVM) in the left lower lobe was found. Interventions: The patient underwent percutaneous closure of PAVM. Afterward, warfarin was commenced because of the high risk of further thromboembolic complications in the following weeks to months. Post-treatment computed tomography pulmonary angiogram (CTPA) demonstrated successful closure of PAVM. No microbubble signals were detected on post-treatment contrast transcranial Doppler ultrasound (TCD) study. Outcomes: The patient suffered no further embolic events during 3-year follow-up. No recanalization or new PAVMs were detected on CT scan. Lessons: Neurological PAVM-associated risks are common but remain poorly recognized. A strategic protocol is imperative in searching for the etiologies of cryptogenic stroke.