Ask The Doctors: August 2019

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Although the effects of ASA are not fully understood, they may be a possible risk factor for an unexplained ("cryptogenic") stroke, since the occurrence is higher in patients undergoing echo in this setting. In these cases, the ASA is usually large and/or hyper mobile and is associated with a large amount of blood being shunted between the atria due to a PFO or septal defect. Identifying these abnormalities in a stroke patient does not necessarily prove a causal relationship, since other stroke causes may be present.
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