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Clinical experience of Hall-Kaster valve. Operative results and hemodynamic studies
Insights
The Hall-Kaster pivotal disc prosthetic valve demonstrated excellent function and safety in 137 patients undergoing valve replacement. This prosthetic heart valve showed favorable hemodynamics with no valve-related deaths or complications during follow-up.
Area of Science:
- Cardiovascular Surgery
- Biomedical Engineering
- Prosthetic Heart Valves
Background:
- The Hall-Kaster pivotal disc prosthetic valve (HK valve) was developed in 1977.
- Prosthetic heart valves are crucial for treating valvular heart disease.
Purpose of the Study:
- To evaluate the safety and efficacy of the Hall-Kaster pivotal disc prosthetic valve.
- To assess the long-term performance of the HK valve in patients undergoing valve replacement.
Main Methods:
- A retrospective analysis of 137 patients who received the HK valve for aortic or mitral valve replacement since October 1979.
- Intraoperative hemodynamic studies were performed.
- Follow-up was conducted for up to 36 months.
Main Results:
- The overall operative mortality rate was 5.1%.
- No valve-related deaths, mechanical failures, or thromboembolic events were observed during 36 months of follow-up.
- Excellent valvular function was confirmed by intraoperative hemodynamic studies, with mean pressure gradients of 11.0 +/- 1.6 mmHg (aortic) and 4.2 +/- 2.0 mmHg (mitral).
- Mean calculated valve areas were 1.7 +/- 0.6 cm2 (aortic) and 3.7 +/- 1.2 cm2 (mitral).
Conclusions:
- The Hall-Kaster pivotal disc prosthetic valve is an efficient and favorable option for aortic and mitral valve replacement.
- The HK valve exhibits excellent hemodynamic performance and a good safety profile.
Abstract:
The Hall-Kaster pivotal disc prosthetic valve (HK valve) was introduced in 1977. Since October 1979, we have used the HK valve in 137 patients for valve replacement. The over-all operative mortality was 5.1%. During 36 months follow-up, there were 3 late deaths due to congestive heart failure, but no valve related death, no mechanical failure and no thromboembolic episode have been encountered. Intraoperative hemodynamic studies revealed its valvular function to be excellent. The mean pressure gradients across the prosthesis were 11.0 +/- 1.6 and 4.2 +/- 2.0 mmHg in aortic and mitral position, respectively. The mean calculated valve areas were 1.7 +/- 0.6 and 3.7 +/- 1.2 cm2 in aortic and mitral position, respectively. Thus, the Hall-Kaster prosthetic valve was found to be an efficient and favorable prosthetic heart valve for aortic and mitral valve replacement.