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Pooja Choradia: Obesity and Pulmonary Embolism – The Hidden Prothrombotic State
Pooja Choradia/Instagram
Mar 28, 2026, 18:32

Pooja Choradia: Obesity and Pulmonary Embolism – The Hidden Prothrombotic State

Pooja Choradia, Critical care associate at P.D. Hinduja Hospital Khar, shared a post on LinkedIn:

“Obesity and Pulmonary Embolism: The Hidden Prothrombotic State

Obesity is often discussed in terms of diabetes, hypertension, and heart disease.

But one of its most dangerous and under-recognized complications is: Pulmonary Embolism (PE)

Obesity is not just a risk factor—it is a prothrombotic state.

Why Does Obesity Increase PE Risk?

Obesity affects all components of Virchow’s triad:

  • Hypercoagulability

Increased levels of Fibrinogen, Factor VII, VIII, Plasminogen activator inhibitor-1 (PAI-1)

Leads to impaired fibrinolysis plus increased clot formation

  • Venous Stasis

Reduced mobility, increased intra-abdominal pressure, impaired venous return from lower limbs

Promotes deep vein thrombosis (DVT)

  • Endothelial Dysfunction

Chronic inflammation, adipokine imbalance

Creates a pro-thrombotic vascular environment

How Big Is the Risk?

  • Obesity increases PE risk by 2–3 times
  • Morbid obesity causes even higher risk
  • Strong association with recurrent VTE

The Clinical Challenge

Symptoms are easily missed or misattributed

In obese patients:

  • Breathlessness – blamed on weight
  • Tachycardia – ignored
  • Reduced exercise tolerance – considered baseline

This leads to delayed or missed diagnosis

Additional Risk Amplifiers

Obesity plus any of the following

  • Prolonged immobility
  • Surgery (especially bariatric/orthopedic)
  • Pregnancy
  • Oral contraceptives
  • COVID-19
  • Obstructive sleep apnea
  • Diagnosis: Not Always Straightforward
  • Challenges in Obese Patients
  • Poor imaging windows (echo, ultrasound)
  • CT scanner weight limits (in extreme cases)
  • D-dimer may be chronically elevated

Requires high clinical suspicion

Management Considerations

1. Anticoagulation

Standard therapy, but:

  • Dosing may need adjustment
  • Limited data in extreme obesity

2. Thrombolysis

Same indications, but higher bleeding risk assessment needed

3. Mechanical Prophylaxis

  • Compression devices
  • Early mobilization

4. Long-Term Prevention

  • Weight reduction
  • Treat OSA
  • Lifestyle modification
  • Clinical Pearl

If an obese patient presents with:

  1. Sudden worsening breathlessness
  2. Unexplained tachycardia

Do not attribute everything to weight

Rule out pulmonary embolism

Key Takeaway

Obesity silently primes the body for thrombosis.

Pulmonary embolism in these patients is:

  • More common
  • More difficult to diagnose
  • And potentially more fatal“

Pooja Choradia: Obesity and Pulmonary Embolism - The Hidden Prothrombotic State

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Anticoagulation Endothelial Dysfunction Factor VII Factor VIII fibrinogen fibrinolysis Health Hematology Hemostasis News Hemostasis Today Hypercoagulability Medicine Obesity Plasminogen activator inhibitor-1 Pooja Choradia Pulmonary embolism Thrombolysis Venous stasis Virchow’s Triad
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