RT Journal Article SR Electronic T1 QT prolongation after ampicillin anaphylaxis. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 308 OP 310 DO 10.1136/hrt.55.3.308 VO 55 IS 3 A1 Mehta, D A1 Warwick, G L A1 Goldberg, M J YR 1986 UL http://heart.bmj.com/content/55/3/308.abstract AB Tall T waves and pronounced prolongation of the QT interval developed 24 hours after an apparently complete recovery from an acute anaphylactic reaction to oral ampicillin in a previously healthy woman of 29. These electrocardiographic abnormalities gradually subsided over five days. The prolongation of the QT interval has not previously been reported after anaphylaxis.