Decreased survival of RGS4-myc transgenic mice after loose TAC. Survival rates after loose TAC in 5x-RGS4-myc mice (5x-RGS4-myc TAC) and nontransgenic congenic C57BL × SJL mice (C57BL × SJL TAC) and after a sham operation in 5x-RGS4-myc mice (5x-RGS4-myc sham).