ICAM1 and Tetralogy of Fallot: [25–27] In the EMB of patients with lymphocytic myocarditis, respectively 81 and 46% of the cardiac blood vessels were positive for ICAM-1 or VCAM-1, whereas in control tissue obtained from patients with tetralogy of Fallot, 24% of the cardiac blood vessels was positive for ICAM-1 and 10% for VCAM-1.