Sluggish Upstroke of Signal-Averaged QRS Complex. An Arrhythmogenic Sign in Patients with Anteroseptal Myocardial Infarction oleh Masafumi Kanemura, MD, Takao Katoh, MD, Takashi Tanaka, MD, Shin-ichiro Kamei, MD, Shin-ichi Kuroki, MD, Teruo Takano, MD, Hirokazu Hayakawa, MD