RT Journal Article SR Electronic T1 Epidural haematoma presenting as polymorphic ventricular tachycardia JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 316 OP 316 DO 10.1136/heart.89.3.316 VO 89 IS 3 A1 T R Webb A1 J M Morgan A1 P R Roberts YR 2003 UL http://heart.bmj.com/content/89/3/316.1.abstract AB