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Coagulation cascade and anticoagulants 

Satyendra Dhar MD, @DharSaty

#coagulation #coumadin #heparin #warfarin #apaxiban #pradaxa #xarelto #DOAC #vWF
Coagulation cascade and anticoagulants ... coagulation #coumadin #heparin ... xarelto #DOAC #vWF #thrombin ... #ptt #pt
How to Evaluate an Abnormal APTT
Step 1: Is the PT or APTT Artifactually Prolonged?
Step 2: Is
to Evaluate an Abnormal ... Step 1: Is the PT ... Patient Receiving Anticoagulants ... K Antagonists, Heparin ... , or Direct Thrombin
Effect of Anticoagulants on Coagulation Tests
PT / INR, aPTT, Anti-Xa Activity, Activated Clotting Time, Thrombin Time,
Effect of Anticoagulants ... Coagulation Tests PT ... Clotting Time, Thrombin ... Time, Ecarin Clotting ... EricsMedicalLectures/ #Anticoagulants
Bleeding and Bruising - Disorders of Hemostasis - Differential Diagnosis Framework

== Quantitative or Qualitative defect in
PT/NORMAL PTT: ... PT/ABNORMAL PTT ... Acquired: • Heparin ... PT/NORMAL PTT: ... PT/ABNORMAL PTT
The coagulation cascade is shown, separated into different phases with their endogenous and pharmacological inhibitors shown.
at the site of injury ... Thrombin, then primes ... #clot #PT #PTT ... anticoagulation #anticoagulant ... Rivaroxaban #Edoxaban #heparin
This 24M presented with acute onset CP/SOB, hypoxia, HR 150s. What's the diagnosis? Treatment options? Hint:
Thrombus in transit ... Pt had extensive ... Started on heparin ... 3 d later with normal ... Echocardiogram #A4C
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Causes of Abnormal ... unfractionated heparin ... - Other anticoagulants ... drugs e.g. direct thrombin ... Jcortesizaguirr #Abnormal
Disseminated Intravascular Coagulation (DIC) Overview

Increased Clotting and Consumption of Clotting Factors

Findings:
 • Bleeding
 • Recent history
• Prolonged PT ... • Increased thrombin ... Fibrinogen: ↓ • PT ... Reduction of pro/anticoagulants ... 100mg/dL) - Heparin
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
for a Prolonged PT ... Pre-analytical cause (e.g. heparin ... drugs (e.g. direct thrombin ... inhibitors, heparin ... amyloidosis #Abnormal
Acute Liver Injury - Differential Diagnosis Algorithm

Vascular Causes of Acute Liver Injury: 
 • Hepatic vein:
: • Hepatic vein ... Venoocclusive disease • Hepatic ... AST/ALT > ALP: Typical ... - If both are normal ... function may be abnormal