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Personal follow-up of 100 aortic valve replacement patients for 1081 patient years
1Department of Thoracic and Cardiovascular Surgery, Helsinki University Central Hospital, Finland.
Insights
This study on aortic valve replacement found that while mechanical valve type is important, high-quality postoperative management is key to preventing long-term complications. Patient selection and surgical timing also play crucial roles in outcomes.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
- Clinical Medicine
Background:
- Aortic valve replacement (AVR) carries risks including bleeding, endocarditis, and leakage.
- First-generation prosthetic disc valves were used in this long-term AVR patient study.
- Understanding mechanical valve performance is crucial for patient prognosis.
Purpose of the Study:
- To evaluate the long-term prognosis of patients undergoing AVR with first-generation prosthetic disc valves.
- To assess the incidence of major complications associated with these mechanical valves.
- To identify key factors influencing long-term outcomes after AVR.
Main Methods:
- A cohort of 100 AVR patients with first-generation prosthetic disc valves was followed for up to 14 years.
- Data collected at 6, 10, and 14 years post-surgery included clinical events and outcomes.
- Total follow-up time was 1081 patient-years, with a mean patient age of 47.1 years.
Main Results:
- Incidence rates per 100 patient-years: anticoagulation bleeding (0.83), embolic complications (0.56), prosthetic valve endocarditis (0.65), and periprosthetic leakage (0.37).
- Freedom from all valve-related events at 10 years was 73.8%.
- Specific complication rates varied, with bleeding and endocarditis being most frequent.
Conclusions:
- First-generation disc valves demonstrated specific complication rates over long-term follow-up.
- Postoperative management quality is a critical predictor of long-term complications, potentially more than technical improvements.
- Optimal patient selection and surgical timing remain essential for favorable AVR outcomes.
Background:
Anticoagulant related complications, prosthetic valve endocarditis and periprosthetic leakage are the most serious complications after aortic valve replacement. In this study, aortic valve replacement patients were followed-up to evaluate the importance of mechanical valve type to the prognosis of the patients.
Methods:
The clinical course in 100 patients who had undergone aortic valve replacement with first generation prosthetic disc valves, was followed personally by the author at three separate time-points, 6, 10 and 14 years postoperatively, giving a total of 1081 follow-up years. The mean operation age of the patients was 47.1 years (range, 23 to 70 years). There were 33 patients with aortic stenosis, 50 with aortic regurgitation and 17 with combined aortic valve failure.
Results:
During the follow-up there were nine events of anticoagulation induced bleeding, incidence 0.83/100 patient-years (pty), [95% confidence interval (CI), 0.39-1.57/100 pty]. The incidence of embolic complications was 0.56/100 pty, [0.20-1.20/100 pty], that of prosthetic valve endocarditis 0.65/100 pty, [0.26-1.32/100 pty] and that for periprosthetic leakage 0.37/100 pty, [0.05-0.81/100 pty]. Freedom from all valve-related events was 73.8%, [62.3-85.3%] at 10 years.
Conclusion:
On the basis of the results with first generation disc valves, it is concluded that the clinically most important factor predicting long-term complications in addition to patient selection and timing of operation is the quality of postoperative management, prevailing even over significant technical improvements.