Management of Severe Mitral Stenosis

Indications for Cardiology Referral

The European Society of Cardiology recommends that symptomatic patients with severe mitral stenosis (valve area <1.5 cm²) require urgent cardiology referral because intervention is indicated and delays can lead to irreversible pulmonary hypertension, right heart failure, and death 1, 2
Symptomatic patients (NYHA class II-IV) with dyspnea, fatigue, or pulmonary congestion require intervention 1, 2
Patients with pulmonary artery systolic pressure >50 mmHg at rest, even if asymptomatic, require cardiology referral 1, 2
New-onset atrial fibrillation or paroxysmal atrial fibrillation is an indication for cardiology referral 2, 3
History of systemic embolism or presence of left atrial thrombus requires cardiology evaluation 2, 3
Dense spontaneous contrast in the left atrium on echocardiography is an indication for cardiology referral 2, 3
Need for major non-cardiac surgery in a patient with severe mitral stenosis requires cardiology evaluation 4, 5
Desire for pregnancy in a woman with severe mitral stenosis requires cardiology referral 1, 6

The European Society of Cardiology recommends that most patients with severe mitral stenosis and favorable valve anatomy undergo percutaneous mitral commissurotomy (PMC) as the treatment of choice 1, 7
PMC is a Class I indication (highest level recommendation) for symptomatic patients without unfavorable characteristics 1, 2
Surgery is a Class I indication for symptomatic patients not suitable for PMC 1, 2
Medical therapy alone is purely palliative and does not prevent disease progression 8

For patients with severe mitral stenosis requiring non-cardiac surgery, cardiology referral is mandatory to assess the need for balloon mitral valvuloplasty or open surgical repair before high-risk non-cardiac surgery 4, 5
Significant mitral stenosis increases the risk of heart failure during non-cardiac surgery 4, 5
Heart rate control is critical perioperatively to prevent severe pulmonary congestion 4

The American College of Cardiology recommends yearly clinical and echocardiographic examinations for asymptomatic patients with clinically significant mitral stenosis 7, 9
The European Society of Cardiology recommends every 2-3 years for asymptomatic severe MS 8, 6
Heart rate control with beta-blockers, calcium channel blockers, or digoxin is crucial in atrial fibrillation 8, 3, 6
Anticoagulation with vitamin K antagonists is recommended for atrial fibrillation, history of embolism, left atrial thrombus, dense spontaneous contrast, or enlarged left atrium 2, 8, 3