| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.6 / 5 (175) | Vienna, Austria | — | — | — | — | — | World's Best Hospitals 2021 by Newsweek, International Organization for Standardization | |
| #2 | 4.5 / 5 (19) | Vienna, Austria | 33+ years | — | Children with complex VSD needing heart surgery | National referral center for complex cardiac surgery. Dedicated pediatric cardiology department and cardiac outpatient clinic, with cardio-thoracic-vascular and neonatal/pediatric ICUs for high-risk cases. | International Organization for Standardization, World's Best Hospitals 2026 by Newsweek | ||
| #3 | 4.4 / 5 | Graz, Austria | — | — | — | — | — | — |