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Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
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During the postoperative period, it is crucial to focus on maintaining circulation, identifying and managing potential complications, and planning for discharge.Nursing AssessmentVital signs monitoring: Regularly monitor vital signs, including blood pressure, heart rate, respiratory rate, and temperature, to detect early signs of complications such as bleeding and infection.Circulation assessment: Monitor pulses, perform Doppler assessments, and check capillary refill, color, temperature, and...
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Predicting Arterial Thrombotic Events Following Peripheral Revascularization Using Objective Viscoelastic Data.

Monica Majumdar1, Ryan P Hall1, Zachary Feldman1

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Journal of the American Heart Association
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Thromboelastography with platelet mapping (TEG-PM) can predict graft/stent thrombosis after lower extremity revascularization. High platelet aggregation (>70.8%) or low inhibition (<29.2%) identifies patients at increased risk.

Keywords:
graft thrombosisperipheral artery diseasepersonalized medicineplatelet aggregationthromboelastographythromboprophylaxis

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Area of Science:

  • Vascular Surgery
  • Cardiovascular Medicine
  • Thrombosis Research

Background:

  • Peripheral artery disease affects over 200 million people globally, with graft/stent thrombosis leading to amputation and mortality.
  • Optimizing antithrombotic therapy is crucial but lacks clear guidance for heterogeneous patient populations.
  • Thromboelastography with platelet mapping (TEG-PM) offers comprehensive coagulation metrics for personalized thromboprophylaxis.

Purpose of the Study:

  • To determine if TEG-PM can predict subacute graft/stent thrombosis post-lower extremity revascularization.
  • To establish objective cut-point values using TEG-PM to identify high-risk patients.

Main Methods:

  • Prospective observational study of 162 patients undergoing lower extremity revascularization.
  • Follow-up for 1 year to assess graft/stent thrombosis.
  • TEG-PM analysis compared pre-thrombosis in event group vs. post-procedure in non-event group; Cox proportional hazards and cut-point analyses were performed.

Main Results:

  • 30 patients (18.5%) experienced graft/stent thrombosis.
  • Thrombosis group showed significantly higher platelet aggregation (79.7±15.7% vs. 58.5±26.4%) and lower platelet inhibition (20.7±15.6% vs. 41.1±26.6%) (P<0.01).
  • Increased platelet aggregation (HR 1.05 per 1% increase) predicted thrombosis; cut points >70.8% aggregation or <29.2% inhibition identified high-risk patients (87% sensitivity, 70-71% specificity).

Conclusions:

  • Elevated platelet reactivity, measured by TEG-PM, predicts subacute graft/stent thrombosis in patients undergoing lower extremity revascularization.
  • Specific TEG-PM cut points can identify high-risk individuals.
  • Consideration of alternative or augmented antithrombotic regimens for high-risk patients may reduce postoperative thrombotic events.