Welcome to International Journal of Anatomy and Research

Type of Article: Original Research

Year: 2015 | Volume 3 | Issue 4 | Page No. 1741-1744

Date of Publication: 31-12-2015

DOI: http://dx.doi.org/10.16965/ijar.2015.342

MORPHOMETRIC AND CLINICAL ANALYSIS OF MODERATOR BAND IN HUMANS

HannahSugirthabai RajilaRajendran *¹, Ashok Victor ², Gnanasundaram Vaithianathan ³, Indumathi Sundaramurthi ⁴, Thotakura Balaji ⁵, Janani Yoganandham ⁶.

^*1 Professor, Department of Anatomy, Chettinad Hospital & Research Institute, Kelambakkam, Chennai, Tamil Nadu, India.
² Assistant Professor, Department of Cardiology, Stanley Medical College, Chennai, Tamil Nadu, India.
³ Assistant Professor, Department of Anatomy, Chettinad Hospital & Research Institute, Kelambakkam, Chennai, Tamil Nadu, India.
⁴ Professor and HOD, Department of Anatomy, Chettinad Hospital & Research Institute, Kelambakkam, Chennai, Tamil Nadu, India.
⁵ Professor, Department of Anatomy, Chettinad Hospital & Research Institute, Kelambakkam, Chennai, Tamil Nadu, India.
⁶ Assistant Professor, Department of Cardiology, Stanley Medical College, Chennai, Tamil Nadu, India.

Address: Dr. HannahSugirthabai RajilaRajendran, M.S, Ph.D, Professor, Department of Anatomy, Chettinad Hospital & Research Institute, Kelambakkam, Chennai, Tamil Nadu, India. Pin – 603103 Phone No.: +919710403803
E-Mail: ashrajsanada@gmail.com

Abstract

Background: The moderator band has the right bundle of His within the right ventricle. It also is known to prevent the over dilatation of RV.  It is important because of its involvement in RV infarcts, in differentiating RV from LV in congenital anomalies, in VPDs & VTs and in VSDs. The present literature is very much lacking in its morphometry.
Materials and Methods: Moderator band was looked for in 50 hearts and only in this study did we find it in all the hearts.  The length, the thickness, the distance from the tricuspid valve along with the presence of any trabeculations in the septal end or in the papillary muscle end were looked for and recorded.
Results: The average length was 14.71±4.99mm, the average thickness was 4.97±1.64 mm, the average distance from the tricuspid orifice was 19.85±5.92 mm. The attachment to the anterior papillary muscle was found to be branched in 8 hearts that is having an incidence of 14%. The septal end were branched and separated as two in only two specimens. Only one specimen had branched attachments on both the apical and septal ends.
Conclusion: The distance from tricuspid valve and knowledge of branching are important in corrective surgeries of the VSDs. An awareness of length and thickness helps the clinician to differentiate moderator band from the other structures, which may result in misdiagnosis during echocardiography.  Its presence may in fact be of significance in preventing over distension of the heart in RV myocardial ischaemia.
KEY WORDS: Moderator Band, Right Ventricle, Anterior Papillary Muscle, VSD, Tricuspid Valve.

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HannahSugirthabai RajilaRajendran, Ashok Victor, Gnanasundaram Vaithianathan, Indumathi Sundaramurthi, Thotakura Balaji, Janani Yoganandham. MORPHOMETRIC AND CLINICAL ANALYSIS OF MODERATOR BAND IN HUMANS. Int J Anat Res 2015;3(4):1741-1744. DOI: 10.16965/ijar.2015.342