| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 5.0 / 5 (6 reviews) | Pamplona, Spain | — | — | Interventricular septal defect surgery | Complex cardiac defects | JCI-accredited cardiac surgery center with pioneering techniques. Performed Spain's first heart-lung transplant in 1985. | Joint Commission International , European Society for Medical Oncology |