Double Valve Replacement (DVR)
Double Valve Replacement (DVR)
Double Valve Replacement (DVR) is a major cardiac surgery where two of the heart's four valves—most commonly the Mitral and Aortic valves—are replaced during a single operation. This is typically required when both valves are severely diseased (stenosed or leaking) and cannot be effectively repaired. DVR remains a life-saving intervention for advanced multi-valve disease, often restoring normal life expectancy for patients with severe heart failure.
When You Should Consider DVR
Rheumatic Heart Disease: The leading cause of multi-valve damage, where chronic inflammation scars both the mitral and aortic valves.
Calcific Degeneration: Age-related buildup of calcium that stiffens both heart structures simultaneously.
Endocarditis: A severe bacterial infection that has spread from one valve to another, causing structural destruction.
Left Ventricular Strain: When the failure of one valve causes a "domino effect," putting pressure on the second valve until it also fails.
Symptomatic Heart Failure: When symptoms like severe breathlessness, chest pain, and fainting can no longer be managed with medication.
Choosing the Replacement Valves
Mechanical Valves: Made of carbon and metal. They are extremely durable and rarely need replacing, but require lifelong blood thinners (Warfarin).
Bioprosthetic (Tissue) Valves: Made from pig (porcine) or cow (bovine) tissue. They do not require long-term heavy blood thinners but usually wear out in 10–15 years.
On-X Mechanical Valves: A newer generation of mechanical valves that may allow for lower doses of blood thinners.
Ross Procedure (Specialized): Using the patient's own pulmonary valve to replace the aortic valve, though less common in a double-replacement scenario.
[Image comparing a mechanical heart valve and a bioprosthetic tissue valve]
How Is Performed
Access: A midline incision is made through the breastbone (sternotomy) to provide the surgeon full access to the heart.
Cardiopulmonary Bypass: The patient is connected to a heart-lung machine; the heart is temporarily stopped to allow for precise surgery.
Valve Removal: The surgeon opens the aorta and the left atrium to meticulously excise the diseased aortic and mitral valves.
Implantation: Two new valves are sewn into the heart’s natural rings (annulus) using high-strength sutures.
De-airing & Restarting: Air is removed from the heart chambers, blood flow is restored, and the heart is restarted.
Pre-Procedure Preparation
Fasting: Required for at least 8–12 hours before surgery, as it is performed under general anesthesia.
Blood Prep: Extensive blood work, including cross-matching for several units of blood in case a transfusion is needed.
Dental Clearance: Mandatory to ensure no oral bacteria could infect the new prosthetic valves.
Medication Adjustment: Adjusting current medications, especially blood thinners and anti-platelet drugs, as directed by the surgeon.
System Check: Pulmonary function tests and chest X-rays to ensure the lungs are prepared for recovery.
Tests Before DVR
Echocardiogram (TTE/TEE): The primary imaging tool to grade the severity of both valve diseases and measure heart chamber size.
Coronary Angiogram: To check for blockages in the heart arteries that might need to be bypassed during the same surgery.
Cardiac CT or MRI: To provide 3D anatomical detail of the valves and the surrounding heart structures.
Carotid Doppler: To evaluate the risk of stroke by checking the arteries supplying the brain.
Organ Function Panels: Including kidney and liver function tests, as these organs are vital for a successful recovery.
Life After DVR
ICU Stay: Patients spend 24 to 48 hours in the ICU for intensive monitoring of heart rhythm and blood pressure.
Hospital Stay: Total recovery in the hospital usually lasts 7 to 10 days.
Anticoagulation: If mechanical valves are used, strict monitoring of blood clotting levels (INR) begins immediately and continues for life.
Sternal Precautions: No lifting anything heavier than 3 kg for 8 to 12 weeks to allow the breastbone to heal.
Cardiac Rehabilitation: Supervised exercise is critical starting at week 6 to help the heart adjust to the new valves.
Benefits of DVR
Corrects Circulation: Immediately corrects the "back-pressure" on the lungs and the rest of the body.
Symptom Relief: Drastically reduces shortness of breath, fatigue, and swelling in the legs.
Stops Progression: Prevents the progressive stretching and weakening of the heart muscle.
Long-Term Durability: Modern prosthetic options allow many patients to experience decades of improved health.
Single-Stage Correction: Treating both valves in one surgery avoids the high risk of a "redo" operation later in life.