the in-hospital mortality rate for patients with primary vt/vf , that is , vt/vf occurring in the absence of hypotension or heart failure , was similar to that of patients who did not have vt/vf ( 8 % vs 7 % , difference not significant ) , whereas the rate for patients with secondary vt/vf was significantly greater than that for patients with no vt/vf ( 51 % vs 7 % , p less than 0.001 ) .
C0039231
vt
C0042514
vt