According to Carpentier's functional classification of mitral regurgitation, restricted systolic leaflet motion producing MR, as seen in ischaemic papillary muscle displacement, belongs to which type?

• A Type I, normal leaflet motion
• B Type II, excessive leaflet motion
• C Type IIIa, restricted leaflet motion during diastole and systole
• D Type IIIb, restricted leaflet motion during systole ✓

Explanation

Carpentier Type IIIb describes systolic restriction of leaflet motion caused by tethering, classically ischaemic MR where post-infarct papillary muscle displacement and LV remodelling pull the leaflets apically, preventing coaptation. Type IIIa restriction persists in both diastole and systole and typifies rheumatic disease. Type I is normal motion with annular dilation or cleft, and Type II is excessive motion as in prolapse or ruptured chordae.

Reference: Braunwald's Heart Disease, 12th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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