an·tero·sep·tal | \ ˌan-tə-(ˌ)rō-ˈsep-tᵊl 
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\Medical Definition of anteroseptal
: located in front of a septum and especially the interventricular septum An electrocardiogram showed atrial fibrillation, with a ventricular rate of 116 beats per minute, and confirmed the presence of an old anteroseptal infarct.— Ursula B. Kaiser and E. Tessa Hedley-Whyte, The New England Journal of Medicine, 17 May 2001
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