Anatomical dissection of 50 Indian cadaveric hearts revealed a lower mean mitral valve annular circumference (8.248 cm) compared to standard reference values, suggesting potential racial differences in morphology.
May warrant ethnic-specific mitral sizing considerations in Indian patients; leaves open need for population-validated references.
According to text (Gray’s Anatomy 1 39 Edition) mitral valve mean circumference is 9.0 cm in males; 7.2cm in females. Orifice is almost vertical in diastole and at 45 to the sagittal plane with slight forward tilt. Posterior cusp has 2/3 of circumferential attachments. The present study is aimed at studying the morphology of mitral valve and its leaflets by dissection method. There are variable reports of mitral valve morphology. A total of 50 adult hearts procured from cadavers of dissection hall from Department of Anatomy, Government Medical College Surat, were used for study irrespective of sex and age above 50 years. The heart were meticulously dissected for mitral leaflets with the annulus, chordae and papillary muscles were removed as described by Louis a. Du Plessis and Paul Marchand (1964) with some modification. The overall prevalence of mean annular circumference was found to be 8.248cm, Length of free edge of valve curtain7.362 cm, maximum length of leaflet anterior1.924cm and posterior 1.104cm. In our study we get lower circumference of mitral valve as compared to others with similarities in other findings. As heart is procured from cadavers of Indian origin we try to correlate racial difference in morphology.
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A 2009 study studied this question.
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