Editing Atrial flutter (section)

====Clot formation====
Because there is little, if any, effective contraction of the [[atrium (anatomy)|atria]], there is stasis (pooling) of blood in the atria.  Stasis of blood in susceptible individuals can lead to the formation of a [[thrombus]] (blood clot) within the heart. A thrombus is most likely to form in the [[Atrium (heart)|atrial appendages]]. A blood clot in the left atrial appendage is particularly important as the left side of the heart supplies blood to the entire body through the arteries. Thus, any thrombus material that dislodges from this side of the heart can [[embolism|embolize (break off and travel)]] to the brain's arteries, with the potentially devastating consequence of a [[stroke]]. Thrombus material can embolize to any other portion of the body, though usually with a less severe outcome.<ref>{{cite journal |url= https://pubmed.ncbi.nlm.nih.gov/10979012/| title= Risk of thromboembolism in acute atrial fibrillation or atrial flutter | journal= Echocardiography | year= 2000 | pmid= 10979012 |access-date= 3 July 2021| last1= Stoddard | first1= M. F. | volume= 17 | issue= 4 | pages= 393–405 | doi= 10.1111/j.1540-8175.2000.tb01155.x | s2cid= 20652213 }}</ref>