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DAILY FREE MCQ CHALLENGE for Medical PG Preparation
What is the function of chordae tendinae?
A. Opens A-V valve
B. Helps contraction of papillary muscle
C. Prevents contraction of papillary muscle
D. Passes action potential to papillary muscle
TIPSImportant Question from DNB 2015
Answer: C. Prevents contraction of papillary muscle
Papillary muscles contract to tighten chordae tendinae preventing the cups of the tricuspid valve from being everted into the atrium by the pressure developed by the pumping action of the heart. This prevents regurgitation of ventricular blood into the right atrium.
Reference: Page no: 152, Chapter: Thorax, BRS Gross Anatomy by Kyung Won Chung, Harold M. Chung/ 7e. Adams DH, Carabello BA, Castillo JG. Chapter 77. Mitral Valve Regurgitation. In: Fuster V, Walsh RA, Harrington RA. eds. Hurst’s The Heart, 13e. Reference link
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