Are all bileaflet mechanical valves equal?

2009 ◽  
Vol 24 (2) ◽  
pp. 136-141 ◽  
Author(s):  
Michael E Halkos ◽  
John D Puskas
Keyword(s):  
Mechanical Valves ◽  
Bileaflet Mechanical Valves

Results of Isolated Valve Replacement in Hemodialysis Patients

2007 ◽  
Vol 15 (5) ◽  
pp. 386-391 ◽  
Author(s):  
Wataru Kato ◽  
Kazuyoshi Tajima ◽  
Sachie Terasawa ◽  
Keisuke Tanaka ◽  
Akihiko Usui ◽  
...  
Keyword(s):  
Survival Rate ◽  
Valve Replacement ◽  
Anticoagulation Therapy ◽  
Hemodialysis Patients ◽  
Long Term Results ◽  
Bleeding Complications ◽  
Mechanical Valves ◽  
Bileaflet Mechanical Valve ◽  
Bileaflet Mechanical Valves

Frequent bleeding complications and poor long-term results have been reported after valve replacement in hemodialysis patients. We use mainly bileaflet mechanical valves with low-dose warfarin therapy (target international normalized ratio, 1.8–2.0) in such cases. Data of 27 hemodialysis patients undergoing isolated valve replacement from 1993 to 2002 were retrospectively analyzed. Bileaflet mechanical valves were selected in 23 patients and bioprostheses in 4. Those with mechanical valves were treated with mild anticoagulation therapy. There were 3 (11.1%) early deaths due to ischemic colitis, interstitial pneumonia, and ventricular arrhythmia. There were 3 late deaths and 5 bleeding complications during follow-up. The overall survival rate was 85.2% at 3 years and 72.9% at 5 years. The survival rate of patients with mechanical valves was 82.6% at 3 years and 76.7% at 5 years. One patient with a bioprosthesis experienced structural valvular deterioration after 3 years. The results demonstrate an acceptable long-term outcome. A bileaflet mechanical valve managed with mild anticoagulation therapy is a reasonable strategy for hemodialysis patients.

scholarly journals Triple Valve Replacement With Bileaflet Mechanical Valves

2001 ◽  
Vol 65 (4) ◽  
pp. 257-260 ◽  
Author(s):  
Eiki Tayama ◽  
Hiroshi Kawano ◽  
Tohru Takaseya ◽  
Ryoichi Hiratsuka ◽  
Takeshi Oda ◽  
...  
Keyword(s):  
Valve Replacement ◽  
Mechanical Valves ◽  
Triple Valve Replacement ◽  
Bileaflet Mechanical Valves ◽  
Triple Valve

scholarly journals Flow dependence of the Doppler continuity equation for bileaflet mechanical valves: Studies in an animal model

1996 ◽  
Vol 27 (2) ◽  
pp. 234 ◽  
Author(s):  
Robin Shandas ◽  
Michael Jones ◽  
David Solowiejcyk ◽  
Robert Manduley ◽  
Izumi Yamada ◽  
...  
Keyword(s):  
Animal Model ◽  
Continuity Equation ◽  
Flow Dependence ◽  
Mechanical Valves ◽  
Bileaflet Mechanical Valves

scholarly journals Permanent pacemaker implantation after On-X surgical aortic valve replacement: SWEDEHEART observational study

BMJ Open ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. e047962
Author(s):  
Magnus Dalén ◽  
Michael Persson ◽  
Natalie Glaser ◽  
Ulrik Sartipy
Keyword(s):  
Aortic Valve ◽  
Aortic Valve Replacement ◽  
Valve Replacement ◽  
Pacemaker Implantation ◽  
Permanent Pacemaker ◽  
Cardiac Conduction ◽  
Permanent Pacemaker Implantation ◽  
Mechanical Valves ◽  
Valve Housing ◽  
Bileaflet Mechanical Valves

ObjectiveBioprosthetic aortic valves with an extended subannular component, such as transcatheter valves, exert increased compression on the cardiac conduction system and increase the risk for permanent pacemaker implantation. It is unknown if the On-X mechanical prosthetic valve, which has an elongated subannular valve housing, increases the risk of permanent pacemaker implantation following aortic valve replacement.DesignObservational nationwide cohort study.SettingSwedish population-based study.ParticipantsAll patients aged 18–65 years who underwent primary mechanical aortic valve replacement in Sweden between 2005 and 2018. We used the Swedish Web system for Enhancement and Development of Evidence-based care in Heart disease Evaluated According to Recommended Therapies register and other Swedish national health-data registers.ExposurePatients implanted with an On-X valve versus patients implanted with other bileaflet mechanical valves.Primary and secondary outcome measuresPrimary outcome measure was permanent pacemaker implantation within 30 days of surgery.ResultsA total of 2602 patients were included, and 581 patients received an On-X valve and 2021 patients received a St Jude Masters/Regent (n=945) or Carbomedics Reduced valve (n=1076). In the total study population, 115 (4.4%) permanent pacemaker implantations were performed within 30 days after aortic valve replacement. In the propensity score matched population, there was no significant difference in the rate of permanent pacemaker implantation in the On-X group compared with the control group: 3.6% (95% CI: 2.4% to 5.5%) vs 4.0% (95% CI: 2.7% to 5.9%), p=0.877.ConclusionsThe On-X prosthetic heart valve was associated with a similarly low risk for permanent pacemaker implantation after aortic valve replacement compared with other conventional bileaflet mechanical valves. The On-X elongated subannular valve housing does not interfere with the cardiac conduction system.

Sign in / Sign up

Export Citation Format

Share Document