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Atrial flutter (AFL) is a type of abnormal heart rate, or arrhythmia. It occurs when the upper chambers of your heart (the atria) beat too fast. When the top of your heart (atria) beats faster than the bottom (ventricles), it complicates your heart rhythm.
Those signals tell the top of the heart (atria) how and when to contract. When you have AFL, the atria send signals that overwhelm the sinus node. This makes them contract rapidly. The lower chambers respond by also beating very rapidly. A normal heart bate is 60-100 beats per minute (bpm). People with AFL have hearts that beat at 250-300) bpm.
Among 9727 patients with nonvalvular AF (age 76.9 ± 12.5 years, 52.1% female), 3881 patients (39.9%) did not receive antithrombotic therapy, 3934 patients (40.4%) were taking aspirin, and 1912 (19.7%) were taking warfarin. After mean follow-up of 3.19 years, 847 patients (21.8%) without antithrombotic therapy developed ischemic strokes.The annual incidence of ICH in patients taking aspirin and warfarin was 0.77% per year and 0.80% per year, respectively. The adjusted net clinical benefit favored warfarin over aspirin or no therapy for almost all Chinese AF patients CHA2DS2-VASc score ≥1.