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Table 1 Studies of mechanical prosthetic valves obstruction due to pannus formation

From: Rare early prosthesis obstruction after mitral valve replacement: a case report and literature review

Authors, years, [Ref.] Type of studies Position of Valves Incidence & Time Interval Risk Factors
Vitale et al. , 1997, [4] Case series (n = 1878) Mitral valves 3.5%, Mean ≥ 4 years Female, Tilting-disc valves, Bileaflet valves
Barbetseas et al. , 1998, [6] Case series (n = 23) Mitral &Aortic valves More common in aortic position, 178 ± 52 months Not indicated
Rizzoli et al. , 1999, [7] Case series (n = 2680) Mitral &Aortic &Tricuspid valves 0.24%/patient/year, Median = 13 years Tilting-disc valves, Caged-disk/ball valves
Teshima et al. , 2003, [5] Case series (n = 615) Aortic valves 1.95%, Mean = 83 ± 52 months Inadequate anticoagulation, SJM valves
Sakamoto et al. , 2006, [9] Case series (n = 390) Aortic valves 1.8%, Mean = 10 ± 7.9 years Small prostheses size Turbulent Flow
Kondruweit et al. 2008, [8] A case report Aortic valve 6 months Small prosthesis size, Rheumatic fever
Mullenix et al. , 2008, [3] A case report Aortic valve 15 years Female, A tilting-disc valve
Hurwitz et al. , 2009, [2] A case report Aortic valve 8 years Female, Endocarditis
Khan et al. , 2009, [12] A case report Mitral valve 7 years Female, Subvalvular chordae preservation
Matsuyama et al. 2011, [11] A case report Mitral valve 27 months Inadequate anticoagulation, female
Park et al. , 2011, [13] A case report Mitral valve 9 years Female, Subvalvular chordae preservation