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Definition And Threshold Of Mitral Regurgitation
- Mitral regurgitation is backward flow into the left atrium during systole beyond trivial physiological leak.
- A normal heart leaks ~5 mL so anything beyond that requires attention and quantification.
Why MR Is So Common
- Mitral regurgitation is common because the mitral valve function depends on left ventricular structure and function.
- Population prevalence ranges from ~3–5% in healthy people to ~15–20% in hospitalized cardiac patients.
Use Pulse Rhythm As A Clue
- Check the pulse for atrial fibrillation because AF is common in mitral valve disease and should raise suspicion for MR.
- Mention anticoagulation and any bruising when presenting findings, especially in older patients.