Introduction: The atrioventricular valve is present between the right atrium and right ventricle and the mitral valve between the left atrium and left ventricle. Papillary muscles are anchored to the cusps of the AV valve via the chordae tendineae and they contract to prevent prolapse of the valve. Observation: Herein, we present a case with reversal of valves where the mitral annulus had 3 instead of the usual 2 cusps and vice versa on the right side. The left ventricle was dissected as per Cunningham’s dissector, the 3 cusps were attached via. chordae tendinae to 3 papillary muscles whereas the right ventricle was seen to have 2 papillary muscles.
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