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Severe Mitral Regurgitation: Anesthetic Management for Noncardiac Surgery
Valvular heart disease — preop risk stratification, intraop hemodynamics, and crisis management of severe MR
Severe MR creates a low-resistance LV-to-LA pathway with reduced forward output; anesthetic priorities are preload preservation, afterload REDUCTION, sinus rhythm, and avoidance of bradycardia.
If you forget
Headline: Severe MR anesthetic mantra
Board trap
Exam trap: giving phenylephrine bolus for hypotension in severe MR. Pure alpha agonism raises SVR and shunts more LV output backward into the LA, worsening regurgitant volume and precipitating pulmonary edema. Ephedrine or epinephrine (with rate support) is the preferred test-answer agent.
Key numbers
- MAP ≥60–65 mmHg or SBP ≥90 mmHg intraop (2024 ACC/AHA perioperative CV)
- EROA ≥0.4 cm² and/or regurgitant volume ≥60 mL/beat = severe MR
- PASP >50 mmHg = significant PH, elevated risk; >60-70 mmHg = severe PH, markedly elevated risk
- Goal HR 70–90 bpm; bradycardia (<60) prolongs regurgitant time
- Maintain chronic beta-blocker and RAAS inhibitor for HFrEF indication through perioperative period
Reviewed Sep 15, 2026 for clinical accuracy by BoardsBridge Editorial Process
Drill this as a SOE stem →Uri Rozen, MD — Licensed Physician, Israel
Source guidelines: AHA ACC Perioperative Cardiovascular 2024 · AHA ACC Perioperative Cardiovascular 2024 · AHA ACC Perioperative Cardiovascular 2024 · AHA ACC Perioperative Cardiovascular 2024
Re-review cadence: 12 months from reviewed date.
Related on BoardsBridge
Card ID: mr-severe · Path: aba.cardiac.valvular.mr-severe