Table 1

Current results of both procedures

MyectomyASAp Value
Efficacy/effectiveness
 Symptomatic relief95%92%0.43
 Gradient at follow-up (mm Hg)12.2±3.819.7±6.4<0.001
 Reintervention1.6%7.7%<0.001
Complications
 Periprocedural mortality1.1%1.3%0.75
 Periprocedural VT/VF0.2%2.2%0.055
 In-hospital stay (days)9 (4–6)5 (4–6)<0.001
 PM implantation4.0%10%<0.001
Survival
 Overall survival1.4%/year1.5%/year0.78
 SCD+ICD shock0.49%/year0.41%/year0.47
 SCD−ICD shock*0.47%/year0.34%/year0.16
  • ASA, alcohol septal ablation; ICD, internal cardioverter defibrillator; PM, pacemaker; SCD, sudden cardiac death; VT/VF, ventricular tachycardia/ventricular fibrillation