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Official Description

Myocardial resection (eg, ventricular aneurysmectomy)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 33542 refers to myocardial resection, which is a surgical intervention aimed at removing damaged heart tissue, specifically in cases of ventricular aneurysm. A ventricular aneurysm is a localized dilation of the ventricular wall that can occur following an extensive transmural myocardial infarction, which is a type of heart attack that affects the full thickness of the heart muscle. This procedure is also known as ventricular aneurysmectomy. During myocardial resection, the surgeon typically accesses the heart through a median sternotomy, which involves making an incision along the sternum to expose the heart. Once the heart is accessed, cardiopulmonary bypass is established to take over the function of the heart and lungs, allowing the surgeon to operate on a still and bloodless field. The heart is then placed in cardioplegic arrest, which temporarily stops its function to protect the heart muscle during surgery. The left ventricle is incised to expose the non-contractile, scarred area of the heart, which is assessed for damage. The surgeon excises the affected heart muscle, including the area containing the ventricular aneurysm, and then reapproximates the heart tissue before closing it with sutures. After the procedure, the patient is gradually weaned off cardiopulmonary bypass, and chest tubes may be placed as necessary to drain any fluid accumulation. Finally, the chest incision is closed, completing the surgical intervention.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The myocardial resection procedure, as described by CPT® Code 33542, is indicated for specific conditions related to heart function and structure. The primary indications include:

  • Ventricular Aneurysm: This procedure is typically performed for a ventricular aneurysm that results from an extensive transmural myocardial infarction, where a portion of the heart muscle has become weakened and dilated.
  • Postinfarction Ventricular Septal Defect (VSD): Myocardial resection may also be indicated when there is a need to repair a postinfarction VSD, which is a defect in the ventricular septum that can occur after a heart attack.

2. Procedure

The myocardial resection procedure involves several critical steps to ensure effective removal of the damaged heart tissue. The steps are as follows:

  • Step 1: Accessing the Heart - The procedure begins with a median sternotomy, where the surgeon makes an incision along the sternum to gain access to the heart. This approach allows for a clear view and access to the heart's structures.
  • Step 2: Establishing Cardiopulmonary Bypass - Once the heart is exposed, cardiopulmonary bypass is established. This involves connecting the patient to a heart-lung machine that takes over the function of pumping blood and oxygenating it, allowing the surgeon to operate on a still heart.
  • Step 3: Inducing Cardioplegic Arrest - The heart is then placed in cardioplegic arrest, which is achieved by administering a solution that temporarily stops the heart's function. This step is crucial for protecting the heart muscle during the surgical procedure.
  • Step 4: Incising the Left Ventricle - The surgeon makes an incision in the left ventricle to access the area of concern. This incision allows for direct visualization and assessment of the non-contractile, scarred area of the heart.
  • Step 5: Excision of Damaged Tissue - The damaged heart muscle, including the area containing the ventricular aneurysm, is carefully excised. This step is vital for restoring normal heart function and preventing further complications.
  • Step 6: Reapproximating Heart Tissue - After the excision, the remaining heart tissue is reapproximated and closed with sutures. This step ensures that the heart's structure is restored as closely as possible to its normal anatomy.
  • Step 7: Weaning Off Cardiopulmonary Bypass - The patient is gradually weaned off the cardiopulmonary bypass machine, allowing the heart to resume its normal function.
  • Step 8: Placing Chest Tubes - Chest tubes may be placed as needed to drain any fluid that accumulates in the chest cavity following the surgery.
  • Step 9: Closing the Chest Incision - Finally, the chest incision is closed, completing the surgical procedure.

3. Post-Procedure

After the myocardial resection procedure, patients typically require close monitoring in a recovery setting. Post-procedure care may include managing pain, monitoring for any signs of complications such as bleeding or infection, and ensuring proper heart function. Patients may also need to stay in the hospital for several days for observation and recovery. The placement of chest tubes, if performed, will be monitored to ensure proper drainage. Rehabilitation and follow-up care will be essential to support the patient's recovery and to assess the success of the procedure.

Short Descr REMOVAL OF HEART LESION
Medium Descr MYOCARDIAL RESECTION
Long Descr Myocardial resection (eg, ventricular aneurysmectomy)
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 1 - Co-surgeons could be paid, though supporting documentation is required...
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P2F - Major procedure, cardiovascular-Other
MUE 1
CCS Clinical Classification 49 - Other OR heart procedures

This is a primary code that can be used with these additional add-on codes.

33141 Addon Code MPFS Status: Active Code APC C Physician Quality Reporting PUB 100 CPT Assistant Article Transmyocardial laser revascularization, by thoracotomy; performed at the time of other open cardiac procedure(s) (List separately in addition to code for primary procedure)
33257 Addon Code MPFS Status: Active Code APC C Illustration for Code Operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedure(s), limited (eg, modified maze procedure) (List separately in addition to code for primary procedure)
33259 Addon Code MPFS Status: Active Code APC C Illustration for Code Operative tissue ablation and reconstruction of atria, performed at the time of other cardiac procedure(s), extensive (eg, maze procedure), with cardiopulmonary bypass (List separately in addition to code for primary procedure)
34714 Addon Code MPFS Status: Active Code APC N ASC N1 Open femoral artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by groin incision, unilateral (List separately in addition to code for primary procedure)
34716 Addon Code MPFS Status: Active Code APC N ASC N1 Open axillary/subclavian artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by infraclavicular or supraclavicular incision, unilateral (List separately in addition to code for primary procedure)
34833 Addon Code Resequenced Code MPFS Status: Active Code APC C CPT Assistant Article Open iliac artery exposure with creation of conduit for delivery of endovascular prosthesis or for establishment of cardiopulmonary bypass, by abdominal or retroperitoneal incision, unilateral (List separately in addition to code for primary procedure)
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CR Catastrophe/disaster related
GC This service has been performed in part by a resident under the direction of a teaching physician
LT Left side (used to identify procedures performed on the left side of the body)
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