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Comparison of the occurrence of thromboembolic and bleeding complications in patients with mechanical heart valve prosthesis with one and two leaflets in the mitral position.

Campos NL - Rev Bras Cir Cardiovasc (2014 Jan-Mar)

Bottom Line: The results are presented in an actuarial study and the frequency of occurrence of linear events.Bleeding rates were higher for patients with bi leaflet prosthetic valve.Patients with bi leaflet prosthetic valve had more bleeding than patients with mono leaflet prosthetic valve, however this difference was restricted to the bleeding of minor nature.

View Article: PubMed Central - PubMed

ABSTRACT

Introduction: Patients with mechanical heart valve prostheses must continuously be treated with oral anticoagulants to prevent thromboembolic events related to prosthetesis. These patients should be continually evaluated for the control of oral anticoagulation.

Objective: To compare the occurrence of thromboembolic and hemorragic complications in patients with mechanical heart valve prosthesis with one (mono) and two (bi) leaflets in the mitral position in anticoagulant therapy.

Methods: We studied the 10-year interval, 117 patients with prosthesis in the mitral position, 48 with prosthetic single leaflet and 69 with two leaflets. We evaluated the occurrence of thromboembolic and hemorrhagic major and minor degree under gravity. The results are presented in an actuarial study and the frequency of occurrence of linear events.

Results: The actuarial survival curves showed that over time, patients with prosthetic heart valve with one leaflet were less free of thromboembolic complications than patients with two leaflet prosthetic valve, while the latter (two leaflet) were less free of hemorrhagic accidents. The linearized frequency of occurrence of thromboembolism were higher in patients with mono leaflet prosthesis. Bleeding rates were higher for patients with bi leaflet prosthetic valve.

Conclusion: Patients with mono leaflet prosthetic heart valve showed that they are more prone to the occurrence of serious thromboembolic events compared to those with bi leaflet prosthetic valve. Patients with bi leaflet prosthetic valve had more bleeding than patients with mono leaflet prosthetic valve, however this difference was restricted to the bleeding of minor nature.

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Curves and actuarial data showing the percentage of patients free of minorthromboembolic events mTE (ordinate) with time-years ( abscissa) for both types ofprostheses studied. Mo = Mono-leaflet prosthesis; Bi = Bi-leaflet prosthesis; SE =standard error range; LLCI95% = lower limit of 95% Confidence Interval and ULCI95% = Upper Limit of 95% Confidence Interval
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f04: Curves and actuarial data showing the percentage of patients free of minorthromboembolic events mTE (ordinate) with time-years ( abscissa) for both types ofprostheses studied. Mo = Mono-leaflet prosthesis; Bi = Bi-leaflet prosthesis; SE =standard error range; LLCI95% = lower limit of 95% Confidence Interval and ULCI95% = Upper Limit of 95% Confidence Interval

Mentions: Figure 1 shows the curves and actuarialcalculations to patients free of any type of event to allow comparison between patientswith mono- and bi-leaflet prostheses. In Figures2, 3 and 4 we found the curves and actuarial calculations for patients free of anythromboembolic events, minor and major thromboembolic events, respectively for patientswith mono- and bi-leaflet prostheses.


Comparison of the occurrence of thromboembolic and bleeding complications in patients with mechanical heart valve prosthesis with one and two leaflets in the mitral position.

Campos NL - Rev Bras Cir Cardiovasc (2014 Jan-Mar)

Curves and actuarial data showing the percentage of patients free of minorthromboembolic events mTE (ordinate) with time-years ( abscissa) for both types ofprostheses studied. Mo = Mono-leaflet prosthesis; Bi = Bi-leaflet prosthesis; SE =standard error range; LLCI95% = lower limit of 95% Confidence Interval and ULCI95% = Upper Limit of 95% Confidence Interval
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4389486&req=5

f04: Curves and actuarial data showing the percentage of patients free of minorthromboembolic events mTE (ordinate) with time-years ( abscissa) for both types ofprostheses studied. Mo = Mono-leaflet prosthesis; Bi = Bi-leaflet prosthesis; SE =standard error range; LLCI95% = lower limit of 95% Confidence Interval and ULCI95% = Upper Limit of 95% Confidence Interval
Mentions: Figure 1 shows the curves and actuarialcalculations to patients free of any type of event to allow comparison between patientswith mono- and bi-leaflet prostheses. In Figures2, 3 and 4 we found the curves and actuarial calculations for patients free of anythromboembolic events, minor and major thromboembolic events, respectively for patientswith mono- and bi-leaflet prostheses.

Bottom Line: The results are presented in an actuarial study and the frequency of occurrence of linear events.Bleeding rates were higher for patients with bi leaflet prosthetic valve.Patients with bi leaflet prosthetic valve had more bleeding than patients with mono leaflet prosthetic valve, however this difference was restricted to the bleeding of minor nature.

View Article: PubMed Central - PubMed

ABSTRACT

Introduction: Patients with mechanical heart valve prostheses must continuously be treated with oral anticoagulants to prevent thromboembolic events related to prosthetesis. These patients should be continually evaluated for the control of oral anticoagulation.

Objective: To compare the occurrence of thromboembolic and hemorragic complications in patients with mechanical heart valve prosthesis with one (mono) and two (bi) leaflets in the mitral position in anticoagulant therapy.

Methods: We studied the 10-year interval, 117 patients with prosthesis in the mitral position, 48 with prosthetic single leaflet and 69 with two leaflets. We evaluated the occurrence of thromboembolic and hemorrhagic major and minor degree under gravity. The results are presented in an actuarial study and the frequency of occurrence of linear events.

Results: The actuarial survival curves showed that over time, patients with prosthetic heart valve with one leaflet were less free of thromboembolic complications than patients with two leaflet prosthetic valve, while the latter (two leaflet) were less free of hemorrhagic accidents. The linearized frequency of occurrence of thromboembolism were higher in patients with mono leaflet prosthesis. Bleeding rates were higher for patients with bi leaflet prosthetic valve.

Conclusion: Patients with mono leaflet prosthetic heart valve showed that they are more prone to the occurrence of serious thromboembolic events compared to those with bi leaflet prosthetic valve. Patients with bi leaflet prosthetic valve had more bleeding than patients with mono leaflet prosthetic valve, however this difference was restricted to the bleeding of minor nature.

Show MeSH
Related in: MedlinePlus