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Valve replacement surgery in severe chronic kidney disease
Min Ho Ju1, Sung-Ho Jung1, Suk Jung Choo1
1Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
International Journal of Cardiology
|April 1, 2017
Summary
For patients with severe chronic kidney disease (CKD) undergoing heart valve surgery, bioprosthetic replacement offers similar survival to mechanical valves but with fewer complications. This suggests bioprosthetic valves may be a safer choice for this high-risk population.
Area of Science:
- Cardiology
- Nephrology
- Surgical Innovation
Background:
- Long-term outcomes of prosthetic heart valve choices in severe chronic kidney disease (CKD) patients remain unclear.
- Severe CKD significantly impacts patient health and surgical risk.
Purpose of the Study:
- To compare the long-term outcomes of mechanical versus bioprosthetic heart valve replacement in patients with stage 4 or 5 CKD.
- To evaluate survival rates and freedom from valve-related complications.
Main Methods:
- A study of 152 adult patients with stage 4 or 5 CKD undergoing heart valve surgery.
- Propensity score analysis was used to minimize selection bias between mechanical (n=92) and bioprosthetic (n=60) groups.
- Outcomes assessed included mortality and valve-related complications over a median follow-up of 22.1 months.
Main Results:
- Bioprosthetic group patients were older with poorer left ventricular function.
- Early mortality rates were similar between groups (approx. 9.9%).
- After propensity score adjustment, survival rates were similar (HR 1.03, P=0.91), but bioprosthetic replacement showed significantly better freedom from valve-related events (HR 4.49, P=0.045).
Conclusions:
- Heart valve replacement in CKD patients carries a high mortality risk.
- Mechanical valve replacement demonstrated similar survival to bioprosthetic replacement but with a higher risk of valve-related complications.
- Bioprosthetic valve replacement appears to be a more favorable option for patients with severe CKD.