CHA₂DS₂-VASc & HAS-BLED Calculator

CHA₂DS₂-VASc & HAS-BLED Calculator MCP Connector for Claude

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Calculate stroke risk (CHA₂DS₂-VASc) and bleeding risk (HAS-BLED) for atrial fibrillation patients using established clinical guidelines.

3 tools Official Updated Jun 28, 2026 Official Vinkius Partner

Atrial Fibrillation Risk Assessment

The diagnosis of Atrial Fibrillation (AFib) requires careful risk stratification to determine the appropriate balance between preventing stroke and avoiding excessive bleeding. Simply calculating a score is not enough; clinicians need integrated guidance.

The Problem: Traditional assessment methods often evaluate thromboembolic risk and hemorrhagic risk separately, leading to disjointed treatment plans. A patient with high AFib risk but also high bleeding risk needs nuanced advice that weighs both factors simultaneously.

Our Mechanism (Tools): This MCP connector provides a three-step workflow using specialized tools:

  1. query_cha2ds2_vasc_score: Calculates the total CHA₂DS₂-VASc score based on patient demographics and comorbidities (sex, age, HTN, DM, etc.).
  2. calculate_hasbled_score: Assesses the bleeding risk using the HAS-BLED scale, considering factors like blood pressure control and diuretic use.
  3. get_risk_recommendations: Takes both scores to generate a final recommendation, providing the annual stroke risk percentage (based on ESC 2020 criteria) and definitive anticoagulant guidance ('O' or 'A').

Advantage: By running these tools together, agents can provide comprehensive patient care pathways. Instead of just listing a score, they deliver actionable advice that synthesizes both high thromboembolic risk and high bleeding risk concerns, guiding the clinician toward optimal therapy.

afibcha2ds2vaschasbledstroke-riskguidelines

3 tools expose this connector's capabilities to your AI agent.

query_cha2ds2_vasc_score

Calculate the CHA2DS2-VASc score for atrial fibrillation stroke risk assessment

calculate_hasbled_score

Calculate the HAS-BLED score for bleeding risk assessment during anticoagulation

get_risk_recommendations

Get clinical recommendations based on CHA2DS2-VASc and HAS-BLED scores

See how to talk to your AI agent using CHA₂DS₂-VASc & HAS-BLED Calculator.

Run the full risk assessment. Patient is a 78-year-old male, has HTN and DM. No history of stroke/TIA, but does have documented vascular disease and ICC factor. His BP is 140/90; he takes diuretics and has no GI bleeding history. Recommend anticoagulation.

First, we calculate the base risk using **`query_cha2ds2_vasc_score`** (inputs: Male, 78, False, True, True, False, True, True). Next, we assess bleeding risk with **`calculate_hasbled_score`** (inputs: 140, True, False, YES). Finally, **`get_risk_recommendations`** synthesizes these scores, providing the annual stroke risk and the definitive anticoagulation recommendation.

I need to know the bleeding risk for a low-risk patient who is only 65 years old, female, and not taking anticoagulation.

We will first run **`query_cha2ds2_vasc_score`** (inputs: Female, 65, False, False, False, False, False, False) to establish the baseline score. Then, we use **`calculate_hasbled_score`** (inputs: Current BP, False, False, NO). The results will guide us on whether further tools are necessary.

What is the overall recommendation for a high-risk patient? Inputs: Male, 85, True (Stroke/TIA), True (HTN), True (DM), False (CHF), True (VascD), True (ICC). BP: 160/95. Diuretic use: Yes. GI Bleeding: No. Anticoagulation Status: YES.

The full assessment requires three steps: 1) **`query_cha2ds2_vasc_score`** for the high thromboembolic risk. 2) **`calculate_hasbled_score`** to check bleeding risk (inputs: 160, True, False, YES). 3) **`get_risk_recommendations`** uses both results to give a definitive O/A recommendation and annual stroke percentage.

No. While the **`query_cha2ds2_vasc_score`** tool handles the thromboembolic risk, we also use **`calculate_hasbled_score`** to assess bleeding risk and finally **`get_risk_recommendations`** to synthesize both scores into a single, actionable guideline recommendation.

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