Platelet Count Drop After Rapid Deployment Aortic Valve Implantation

Area of Science:

• Cardiovascular Surgery
• Hematology
• Biomaterials Science

Background:

• Postoperative thrombocytopenia is common after aortic valve replacement (AVR) with extracorporeal circulation.
• The Perceval valve has been linked to a more pronounced drop in platelet count than other bioprostheses.
• This study compares platelet count changes between Perceval and Intuity valves during AVR.

Purpose of the Study:

• To analyze and compare platelet count progression after isolated AVR using Perceval versus Intuity valves.
• To evaluate the impact of platelet transfusion on platelet count recovery in patients receiving these valves.

Main Methods:

• Retrospective analysis of 80 patients receiving Perceval valves and 141 patients receiving Intuity valves for isolated AVR (March 2014 - December 2018).
• Patients were categorized based on whether they received platelet transfusions.
• Platelet count nadir and recovery rates were compared between valve groups.

Main Results:

• Patients with Perceval valves experienced a significantly greater drop in minimum platelet count (54% of preoperative) compared to Intuity valves (67%, p<0.001).
• In transfused patients, minimum counts were 52% for Perceval and 79% for Intuity (p<0.01), with faster recovery for Intuity.
• No significant differences in abnormal bleeding or packed red blood cell transfusion rates were observed between groups.

Conclusions:

• The Perceval valve is associated with a significant, transient decrease in platelet count post-AVR compared to the Intuity valve.
• This platelet drop does not appear to elevate bleeding risk.
• Platelet transfusions in this context should be guided by clinical judgment rather than solely by absolute platelet values.