Anticoagulation Holds and Restart Logic
Peri-procedural anticoagulation — weigh thrombotic vs bleeding risk, hold/bridge correctly, and restart safely.
Learning Objectives
- 1.Balance thrombotic risk against procedural bleeding risk.
- 2.Apply hold timing for warfarin and DOACs and know when bridging is needed.
- 3.Restart anticoagulation safely after a procedure.
Overview
Peri-procedural anticoagulation is a constant inpatient/consult question. The framework: how high is the clot risk if held, how high is the bleed risk of the procedure, and what’s the safest hold/restart plan — coordinated with the proceduralist and physician.
Weigh the two risks
- •Thrombotic risk if held: mechanical valve, recent VTE/stroke, high CHA₂DS₂-VASc, recent stent.
- •Bleeding risk of the procedure: minor (often no hold) vs higher-bleed-risk procedures (hold).
- •Some low-bleed-risk procedures don’t require interruption at all.
Hold timing
- •Warfarin: typically held ~5 days before, with INR check; restart after hemostasis.
- •DOACs: hold based on the drug, renal function, and procedure bleeding risk (often ~1–2 days, longer with renal impairment/high-bleed-risk procedures).
- •Confirm specifics against protocol and the proceduralist’s requirements.
Bridging
- •Bridging (e.g., with heparin/LMWH) is reserved for HIGH thrombotic risk (e.g., mechanical mitral valve, recent VTE/stroke).
- •Most AFib patients do NOT need bridging — routine bridging increases bleeding without benefit.
Restart logic
- •Resume once hemostasis is secure; timing balances rebleeding vs clotting and the procedure.
- •Therapeutic anticoagulation often resumes a bit later than prophylactic dosing after higher-bleed-risk procedures.
- •Recent stent on DAPT: interrupting antiplatelets risks stent thrombosis — coordinate carefully.
Red flags / escalation
- •Mechanical valves, very recent VTE/stroke, or recent stents are high-stakes — these decisions are physician/specialist-coordinated.
Escalate / coordinate
High thrombotic-risk patients (mechanical valve, recent VTE/stroke, recent stent) need physician/specialist coordination — don’t make these holds in isolation.
Common beginner mistakes
- •Routinely bridging AFib patients (harmful).
- •Holding anticoagulation for a procedure that doesn’t require it.
- •Forgetting renal function in DOAC hold timing.
- •Interrupting DAPT after a recent stent without coordination.
Mini cases
AFib patient on apixaban (CHA₂DS₂-VASc 3, normal renal function) needs a colonoscopy with possible polypectomy.
Bridge?
Show answer
No bridging — most AFib patients don’t need it. Hold the DOAC for the appropriate interval before the higher-bleed-risk procedure and restart after hemostasis. Confirm timing per protocol.
Patient with a mechanical mitral valve needs surgery requiring warfarin interruption.
Approach?
Show answer
High thrombotic risk — bridging with heparin/LMWH is typically indicated, and this must be coordinated with the physician/specialist. Don’t simply hold warfarin without a bridge plan.