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
