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Difficulty: MediumSurgical and Procedural Interventions

A 70-year-old man presents to the preoperative clinic for evaluation prior to an elective right total hip arthroplasty for severe osteoarthritis. His medical history is significant for hypertension, hyperlipidemia, and a non-ST-segment elevation myocardial infarction (NSTEMI) that occurred 6 weeks ago. At that time, he underwent percutaneous coronary intervention with the placement of a drug-eluting stent (DES) in the left anterior descending artery. His current medications include aspirin, clopidogrel, metoprolol, lisinopril, and atorvastatin. He reports no chest pain or shortness of breath with his current limited daily activities. Vital signs are within normal limits. Physical examination is unremarkable except for decreased range of motion and crepitus in the right hip. Which of the following are the most appropriate recommendations regarding his surgical and perioperative management? (Select all that apply)

  1. Postpone the elective arthroplasty until at least 6 months have passed since the stent placementAnswer
  2. When the surgery is eventually performed, continue aspirin therapy throughout the perioperative periodAnswer
  3. C
    Discontinue clopidogrel immediately and proceed with the scheduled surgery in 7 days
  4. D
    Discontinue both antiplatelet agents and initiate bridging therapy with low-molecular-weight heparin
  5. E
    Perform a preoperative dobutamine stress echocardiogram to determine if the surgery can safely proceed next week

Answer

The most appropriate recommendations are to postpone the elective surgery for at least 6 months after the stent placement and to continue aspirin therapy perioperatively when the procedure is eventually performed.
Patients who undergo percutaneous coronary intervention with a drug-eluting stent require dual antiplatelet therapy (DAPT) to prevent stent thrombosis. For patients with acute coronary syndrome, DAPT is typically indicated for 12 months. Current guidelines mandate that elective noncardiac surgery be delayed for at least 6 months after DES placement to allow for adequate endothelialization of the stent. Furthermore, when elective surgery is eventually performed, aspirin should be continued perioperatively to maintain baseline platelet inhibition, as the risk of cardiac events generally outweighs the risk of surgical bleeding.

Step-by-Step Solution

1
Evaluate the urgency of the proposed surgical intervention.
The procedure is an elective total hip arthroplasty.
Elective surgeries offer flexibility in scheduling, allowing optimization of the patient's cardiovascular status prior to the procedure.
2
Assess the patient's recent cardiovascular history and interventions.
The patient had a drug-eluting stent (DES) placed 6 weeks ago for a non-ST-segment elevation myocardial infarction.
Recent acute coronary syndrome and DES placement are major risk factors for perioperative myocardial infarction and stent thrombosis.
3
Apply surgical timing guidelines for patients with recent DES placement.
Elective noncardiac surgery should be postponed for at least 6 months (and optimally 12 months following acute coronary syndrome).
Performing surgery shortly after stent placement requires premature cessation of dual antiplatelet therapy and induces a prothrombotic state, significantly increasing the risk of stent thrombosis.
4
Determine the optimal perioperative antiplatelet strategy when surgery is eventually performed.
Aspirin should be continued throughout the perioperative period.
Maintaining single antiplatelet therapy reduces the risk of adverse cardiac events without prohibitively increasing the risk of major surgical bleeding.

Key Concept

Perioperative cardiovascular management and timing of elective noncardiac surgery following drug-eluting stent placement.
Estimated Time:1m 30s
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Topics

Surgical and Procedural Interventions

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