CPT® Code 33422

1. Indications

Mitral valvotomy is indicated for patients diagnosed with mitral stenosis, which may present with various symptoms and conditions. The following are the explicit indications for performing this procedure:

• Mitral Stenosis A narrowing of the mitral valve orifice that obstructs blood flow from the left atrium to the left ventricle.
• Rheumatic Heart Disease A common cause of mitral stenosis resulting from rheumatic fever.
• Calcification of the Mitral Annulus Age-related or pathological calcification that contributes to valve narrowing.
• Infective Endocarditis Infection of the heart valves that can lead to structural changes and stenosis.
• Systemic Lupus Erythematosus An autoimmune condition that may affect the heart valves.
• Rheumatoid Arthritis Another autoimmune disorder that can lead to valvular heart disease.
• Carcinoid Heart Disease A condition associated with neuroendocrine tumors that can cause valvular dysfunction.

2. Procedure

The procedure for mitral valvotomy (CPT® Code 33422) involves several critical steps, which are detailed as follows:

• Establishment of Cardiopulmonary Bypass The procedure begins with the patient being placed under general anesthesia. A median sternotomy or right anterolateral thoracotomy is performed to access the heart. Cardiopulmonary bypass is then established, allowing the heart to be temporarily stopped while maintaining circulation and oxygenation of the blood.
• Incision in the Left Atrium Once the heart is stabilized on bypass, an incision is made in the left atrium. This incision provides access to the mitral valve for examination and treatment.
• Examination of the Mitral Valve The mitral valve is carefully examined for any signs of stenosis, calcification, or other abnormalities that may require intervention.
• Debridement of Localized Calcification If localized calcification is identified at the commissures of the mitral valve, it is debrided using a rongeur. This step is crucial for restoring normal function to the valve.
• Incision of the Commissures The commissures between the valve leaflets are incised to release any fusion or scar tissue that may be contributing to the stenosis. This step is essential for widening the valve opening and improving blood flow.
• Closure of the Heart After the necessary interventions are completed, the heart is closed, and cardiopulmonary bypass is discontinued. The heart is allowed to resume its normal rhythm and function.
• Placement of Chest Tubes Chest tubes are placed as needed to facilitate drainage of any fluid accumulation in the thoracic cavity post-surgery.
• Closure of the Chest Finally, the chest is closed, and the patient is monitored closely during the recovery phase.

3. Post-Procedure

Post-procedure care following mitral valvotomy includes monitoring the patient for any complications, such as bleeding or infection. Patients may require pain management and will be observed for signs of heart function improvement. Chest tubes, if placed, will be monitored for drainage output. The recovery period may vary, but patients are typically encouraged to engage in gradual physical activity as tolerated. Follow-up appointments will be necessary to assess the function of the mitral valve and overall cardiac health.