ACVIM Stage B1 MMVR is defined as mitral regurgitation with what?

ACVIM Stage B1 MMVR is defined as mitral regurgitation with what?

• A. Mitral regurgitation with no evidence of cardiac remodeling (no LVE or LAE)
• B. Mitral regurgitation with LAE
• C. Mitral regurgitation with remodeling
• D. Clinical heart failure

Answer: (A)

ACVIM Stage B1 MMVD is about having mitral regurgitation without any cardiac remodeling. In this stage the left atrium and left ventricle have not enlarged, so there’s MR present but no structural changes to the heart’s chambers. That’s why the definition is MR with no evidence of remodeling (no LA enlargement and no LV enlargement). If remodeling were present, you’d be in Stage B2; clinical heart failure would be Stage C/D. This distinction also guides management, with B1 usually managed by monitoring rather than initiating heart failure–specific therapy.

ACVIM Stage B1 MMVD is about having mitral regurgitation without any cardiac remodeling. In this stage the left atrium and left ventricle have not enlarged, so there’s MR present but no structural changes to the heart’s chambers. That’s why the definition is MR with no evidence of remodeling (no LA enlargement and no LV enlargement). If remodeling were present, you’d be in Stage B2; clinical heart failure would be Stage C/D. This distinction also guides management, with B1 usually managed by monitoring rather than initiating heart failure–specific therapy.