Cardiology Calculators

156 calculators & risk scores

Browse 156 Cardiology clinical calculators and risk scores used in everyday UK practice. Every tool runs entirely in your browser — enter the values and get instant scoring, colour-coded interpretation bands and a link to the underlying guideline or publication. ClinCalc Pro is free, needs no sign-up, and is built for working clinicians.

These cardiology tools span Atrial Fibrillation, Bleeding Risk, ACS, ECG, Heart Failure, Cardiovascular Risk and more.

CHA₂DS₂-VASc Score

Estimates annual stroke risk in non-valvular atrial fibrillation to guide anticoagulation.
HAS-BLED Score

Estimates 1-year risk of major bleeding in anticoagulated patients with AF.
TIMI Risk Score for STEMI

Predicts 30-day mortality in ST-elevation myocardial infarction (STEMI).
GRACE ACS Risk Score

Predicts in-hospital and 6-month mortality/MI in ACS (NSTEMI/UA). Uses simplified categorical version.
Corrected QT Interval (Bazett)

Corrects QT interval for heart rate using Bazett's formula. Identifies prolonged QTc risk.
NYHA Heart Failure Classification

Classifies heart failure severity based on functional limitation from symptoms.
Framingham Risk Score

Estimates 10-year cardiovascular risk (coronary heart disease). Simplified categorical version based on Wilson 1998 (male scoring).
Cardiac Output (Fick Method)

Calculates cardiac output using the Fick principle: VO₂ divided by arteriovenous O₂ difference.
Mean Arterial Pressure (MAP)

Calculates mean arterial pressure from systolic and diastolic blood pressure. MAP reflects perfusion pressure to vital organs.
Shock Index

Ratio of heart rate to systolic blood pressure. Identifies haemodynamically unstable patients and predicts mortality in various emergency conditions including trauma, sepsis, and obstetric emergencies.
Revised Cardiac Risk Index (RCRI)

Lee's Revised Cardiac Risk Index estimates the risk of major cardiac events (MI, cardiac arrest, complete heart block, pulmonary oedema) in non-cardiac surgery
CHADS₂ Score for AF Stroke Risk

Original CHADS₂ score for estimating stroke risk in non-valvular atrial fibrillation. Largely superseded by CHA₂DS₂-VASc but still widely referenced.
Duke Criteria for Infective Endocarditis

Modified Duke Criteria stratify patients into definite, possible, or rejected infective endocarditis (IE) based on major and minor clinical and microbiological criteria
Brugada Criteria for Ventricular Tachycardia

4-step algorithm to differentiate ventricular tachycardia (VT) from supraventricular tachycardia (SVT) with aberrancy on a 12-lead ECG. Sensitivity ~99%, specificity ~97% for VT.
Sgarbossa Criteria for MI in LBBB

Identifies STEMI in the presence of left bundle branch block (LBBB) using 3 ECG criteria. Modified Sgarbossa uses proportional ST/S ratio ≥ 0.25 instead of absolute ≥1mm concordance.
CRUSADE Bleeding Risk Score

Estimates the risk of in-hospital major bleeding in patients with NSTEMI/ACS. Considers haematocrit, creatinine clearance, heart rate, sex, signs of heart failure, prior vascular disease, diabetes, and SBP.
DASH Prediction Score for Recurrent VTE

Predicts the annual risk of recurrent VTE after discontinuing anticoagulation following a first unprovoked VTE event, to guide duration of therapy
Duke Activity Status Index (DASI)

Estimates functional capacity (metabolic equivalents, METs) from self-reported ability to perform 12 common activities of daily living. Used for pre-operative cardiac risk assessment.
Rate-Pressure Product (RPP)

Estimates myocardial oxygen demand as the product of heart rate and systolic blood pressure. Used to assess cardiovascular workload during exercise testing or perioperative monitoring.
Killip Classification for Acute MI

Classifies severity of acute myocardial infarction based on clinical features of heart failure. Predicts in-hospital mortality.
EuroSCORE II

Predicts in-hospital mortality after adult cardiac surgery. Replaces additive and logistic EuroSCORE.
HEMORR₂HAGES Bleeding Risk Score

Estimates annual major bleeding risk in AF patients on anticoagulation. 11-component mnemonic score.
HEART Score for Major Adverse Cardiac Events

5-component score predicting 6-week MACE (death, MI, revascularisation) in ED chest pain. Score ≥ 4 warrants admission and further workup.
TIMI Risk Score for UA/NSTEMI

7-point score predicting 14-day risk of all-cause mortality, new or recurrent MI, or severe recurrent ischaemia requiring revascularisation in UA/NSTEMI.
EDACS — Emergency Department Assessment of Chest Pain

Score for low-risk chest pain in the ED, intended for use with 2h serial troponin to identify patients safe for early discharge. Validated with high-sensitivity troponin.
ATRIA Bleeding Risk Score

Predicts major bleeding risk in patients with atrial fibrillation on warfarin anticoagulation. Complements HAS-BLED.
MAGGIC Risk Score for Heart Failure

Meta-Analysis Global Group in Chronic Heart Failure (MAGGIC) score predicts 1-year and 3-year all-cause mortality in chronic heart failure.
ATRIA Stroke Risk Score for Atrial Fibrillation

Predicts stroke/thromboembolism risk in AF patients. Continuous score 0–15. Developed from the ATRIA study (13 000+ AF patients).
Gupta Perioperative Risk for MI or Cardiac Arrest (MICA)

Predicts risk of perioperative myocardial infarction or cardiac arrest. Based on 5 factors. More precise than RCRI for non-cardiac surgery.
ADHERE Algorithm for Acute Decompensated Heart Failure

Stratifies mortality risk in hospitalised acute decompensated heart failure using 3 readily available parameters. Simple decision tree.
Modified Shock Index (MSI)

MSI = Heart Rate / Mean Arterial Pressure. More sensitive than standard shock index for detecting haemodynamic instability in trauma, sepsis, and haemorrhage.
Fridericia Corrected QT Interval (QTcF)

Corrects QT interval for heart rate using cube root formula. Preferred over Bazett at extremes of heart rate (tachycardia/bradycardia).
Caprini Score for VTE Risk (2005)

Predicts risk of venous thromboembolism (VTE) in surgical patients. Guides thromboprophylaxis decisions. Score 0–19+.
IMPROVE VTE Risk Score for Medical Patients

Predicts VTE risk in hospitalised medical (non-surgical) patients. Guides pharmacological thromboprophylaxis decisions.
ACC/AHA Pooled Cohort Equations — ASCVD Risk

Estimates 10-year risk of first atherosclerotic cardiovascular event (MI or fatal CVD) in patients without prior ASCVD. Guides statin therapy decisions.
TIMI Risk Index for STEMI

Simple bedside risk index predicting 30-day mortality in STEMI. Calculated as: heart rate × (age/10)² / systolic BP.
Modified Sgarbossa's Criteria (Smith Modification) for MI in LBBB

Modified version of Sgarbossa criteria using proportional (ratio-based) ST deviation rather than absolute 5 mm threshold for identifying STEMI in LBBB/paced rhythm.
Brugada Phenocopy Score

Distinguishes true Brugada syndrome from Brugada phenocopy (BrP) — transient Brugada ECG pattern due to reversible conditions. High score = true Brugada syndrome.
PREVENT Cardiovascular Risk Calculator (AHA/ACC 2023)

AHA/ACC 2023 PREVENT equations predict 10- and 30-year risk of total cardiovascular disease (CVD) events including heart failure. Replaces pooled cohort equations. Validated across diverse populations.
HE-MACS (History and ECG-Based Manchester ACS Risk Score)

Rapid history- and ECG-based ACS risk stratification tool. Can be applied before troponin results, enabling early rule-out in the ED. Developed and validated in Manchester, UK.
HFSA Risk Score for Heart Failure

Heart Failure Society of America (HFSA) risk stratification for acute heart failure. Predicts 60-day mortality or rehospitalisation from clinical and laboratory variables.
ABC-Bleeding Score for Anticoagulated Atrial Fibrillation

Biomarker-based bleeding risk score for patients with AF on oral anticoagulation. Outperforms HAS-BLED in some cohorts. Uses troponin, GDF-15, and haemoglobin alongside clinical variables.
San Francisco Syncope Rule

Identifies high-risk syncope patients requiring urgent evaluation. Mnemonic: CHESS.
OESIL Score for Syncope

Predicts 12-month all-cause mortality in patients with syncope.
EGSYS Score for Syncope

Differentiates cardiac from non-cardiac syncope. Score ≥3 suggests cardiac aetiology.
ROSE Rule for Syncope

Risk Stratification of Syncope in the Emergency Department. Any criterion = high risk.
Boston Syncope Criteria

Identifies high-risk syncope features requiring hospital admission.
ACC/AHA Heart Failure Staging

Classifies heart failure progression into stages A–D to guide therapy and prognosis.
Framingham Heart Failure Diagnostic Criteria

Diagnoses clinical heart failure. Requires 2 major OR 1 major + 2 minor criteria.
H2FPEF Score for HFpEF

Estimates probability of Heart Failure with Preserved Ejection Fraction (HFpEF) in patients with unexplained dyspnoea.
Ottawa Heart Failure Risk Scale

Identifies ED patients with acute heart failure at high risk for serious adverse events within 14 days.
GWTG-HF Risk Score for In-Hospital Mortality

Predicts in-hospital mortality for acute heart failure using admission variables.
HEAR Score for Acute Chest Pain

Stratifies risk of MACE in acute chest pain — simplified HEART Score without troponin component.
ACTION ICU Score for Intensive Care in NSTEMI

Predicts need for intensive care (haemodynamic/respiratory support or death) in NSTEMI within 48 hours.
Marburg Heart Score

Estimates probability of cardiac chest pain in primary care settings.
INTERCHEST Clinical Prediction Rule

Predicts probability of cardiac chest pain in primary care. Score ≥1 suggests cardiac cause.
ORBIT Bleeding Risk Score for AF

Predicts major bleeding risk in atrial fibrillation patients on anticoagulation.
HERDOO2 Rule for Discontinuing Anticoagulation in Unprovoked VTE

Identifies low-risk women with unprovoked VTE who can safely discontinue anticoagulation. Not validated in men.
DAPT Score

Determines whether to continue dual antiplatelet therapy (DAPT) beyond 12 months after PCI with drug-eluting stent.
RIETE Score for Bleeding Risk in VTE

Predicts risk of major bleeding during first 3 months of anticoagulation for VTE.
IE Mortality Risk Score

Estimates in-hospital mortality risk in infective endocarditis using clinical variables at presentation.
CHA₂DS₂-VA Score for AF (2023)

2023 ACC/AHA updated AF stroke risk score — sex removed as criterion. Score ≥ 2 recommends anticoagulation in all patients.
CHADS-65 for Atrial Fibrillation

Canadian Cardiovascular Society (CCS) simplified guideline for anticoagulation in AF. Age ≥65 or CHADS2 ≥1 → anticoagulate.
Tisdale Risk Score for QT Prolongation

Predicts risk of drug-induced QT prolongation in hospitalised patients.
ACEF II Risk Score for Cardiac Surgery

Predicts 30-day mortality after elective or emergency cardiac surgery using simple preoperative variables.
Thakar Score for Acute Renal Failure after Cardiac Surgery

Predicts risk of acute renal failure requiring dialysis after cardiac surgery.
Cardiac Anaesthesia Risk Evaluation (CARE) Score

Simple anaesthesiologist-assigned risk classification for cardiac surgery based on urgency and comorbidities.
Mehran Score for Post-PCI Contrast Nephropathy

Predicts risk of contrast-induced nephropathy (CIN) following percutaneous coronary intervention (PCI).
Aortic Dissection Detection Risk Score (ADD-RS)

Risk-stratifies patients with suspected acute aortic dissection. Score 0 = very low risk; allows rule-out without CT.
RoPE Score for Patent Foramen Ovale

Estimates probability that a patent foramen ovale (PFO) is responsible for a cryptogenic stroke. Higher score = PFO more likely to be causal.
Canadian Cardiovascular Society (CCS) Angina Grading

Classifies severity of angina pectoris into functional classes to guide investigation and treatment.
Duke Treadmill Score

Predicts cardiovascular mortality risk from exercise stress testing. Score = Exercise time (min) − (5 × ST deviation mm) − (4 × Angina index).
Cardiac Power Output (CPO)

Measures cardiac mechanical power — strongest haemodynamic predictor of mortality in cardiogenic shock. CPO = (MAP × CO) / 451.
Reynolds Risk Score for Women

Predicts 10-year cardiovascular event risk in women ≥ 45 years without prior CVD, adding hsCRP and family history to traditional risk factors.
GO-FAR Score for Post-CPR Survival

Predicts neurologically intact survival to hospital discharge after in-hospital CPR. Assists goals-of-care discussions.
HCM Risk-SCD for Hypertrophic Cardiomyopathy

Estimates 5-year risk of sudden cardiac death (SCD) in hypertrophic cardiomyopathy to guide ICD implantation (ESC 2014 model).
ARC-HBR Criteria for High Bleeding Risk in PCI

Academic Research Consortium for High Bleeding Risk (ARC-HBR) criteria. HBR = 1 major OR ≥ 2 minor criteria. Guides DAPT duration post-PCI.
SCORE2 — 10-Year CVD Risk (Age 40–69)

European Heart Score 2 — estimates 10-year risk of fatal and non-fatal cardiovascular events for adults aged 40–69 without known CVD or diabetes.
SCORE2-OP — 5/10-Year CVD Risk (Age ≥ 70)

SCORE2 for Older Persons — estimates 5-year and 10-year CVD risk in adults aged ≥ 70 years without established CVD.
Subtle Anterior STEMI Calculator (4-Variable)

Distinguishes subtle anterior STEMI (OMI) from early repolarisation pattern using 4 ECG measurements from leads V2–V4 and aVR. Score > 22.9 = STEMI.
REVEAL 2.0 Risk Score for Pulmonary Arterial Hypertension

Predicts 1-year survival in pulmonary arterial hypertension (PAH) using clinical, haemodynamic, and echocardiographic parameters.
PRECISE-DAPT Score for Bleeding on DAPT

Predicts out-of-hospital bleeding risk during dual antiplatelet therapy (DAPT) to guide DAPT duration decisions post-PCI.
2023 Duke-ISCVID Criteria for Infective Endocarditis

Updated 2023 Duke criteria incorporating CT, PET-CT, and MRI findings for IE diagnosis. Classification: Definite, Possible, or Rejected.
CART Score for Cardiac Arrest Risk Triage

Identifies hospitalised patients at high risk for cardiac arrest within 24 hours using four vital sign thresholds.
EUROMACS-RHF Score for Right Heart Failure after LVAD

Predicts severe right heart failure (RHF) requiring short-term mechanical circulatory support after LVAD implantation.
ADAPT Protocol for Cardiac Event Risk

Accelerated Diagnostic Protocol for Chest Pain using TIMI score, ECG, and 0h/2h high-sensitivity troponin. Identifies low-risk patients for early ED discharge. 30-day MACE risk <1% in low-risk group. Validated in ADAPT and APACE trials.
GARFIELD-AF Risk Score for Atrial Fibrillation

Risk model from the Global Anticoagulant Registry in the FIELD-AF study. Predicts 1-year risk of stroke/SE, major bleeding, and all-cause mortality in newly diagnosed non-valvular AF. Adds smoking and renal function to traditional CHA2DS2-VASc variables.
SCORE2-Diabetes 10-Year CVD Risk in Type 2 Diabetes

ESC 2023 model estimating 10-year cardiovascular disease risk in people with type 2 diabetes aged 40 to 69 without established CVD. Extends standard SCORE2 by incorporating HbA1c, diabetes duration, and eGFR. Guides statin intensity and SGLT-2 inhibitor or GLP-1 RA therapy decisions.
T-MACS Troponin-Only Manchester ACS Decision Aid

Single time-point decision aid using high-sensitivity troponin T and 5 clinical variables to rule in or rule out AMI at presentation. Validated prospectively in multiple cohorts. Avoids the need for 3-hour serial troponin in very-low-risk patients.
Emergency Heart Failure Mortality Risk Grade (EHMRG)

Clinical risk score predicting 7-day mortality in emergency department patients presenting with acute heart failure. Based on 8 variables assessed at ED arrival. Validated in the Ontario HF registry. Guides admission versus discharge decision-making.
CAHP Cardiac Arrest Hospital Prognosis Score

Clinical score predicting neurological outcome (CPC 1 or 2 at 30 days) in patients resuscitated from out-of-hospital cardiac arrest. Based on 8 variables at ED arrival. Validated in French multicentre cohorts. Low score indicates favourable neurological outcome.
VIRSTA Score for Infective Endocarditis Risk in Bacteraemia

Clinical prediction rule identifying patients with Staphylococcus aureus bacteraemia at high risk for infective endocarditis requiring echocardiography. Validated in French multicentre cohorts. Score at or above 3 indicates echocardiography is required.
DOAC Score for Selecting Direct Oral Anticoagulant in Non-Valvular AF

Practical scoring tool to guide DOAC selection over warfarin in patients with non-valvular atrial fibrillation. Considers renal function, drug interactions, adherence, and patient-specific factors.
Seattle Heart Failure Model (SHFM)

Multivariable model for predicting 1-year and mean survival in patients with heart failure. Validated in over 9,000 patients across multiple trials. Estimates absolute and relative benefit of HF interventions.
SEX-SHOCK Risk Score for Cardiogenic Shock Development in ACS

Predicts risk of developing cardiogenic shock in patients presenting with acute coronary syndrome (ACS). Validated in STEMI and NSTEMI populations to identify high-risk patients for early intensive monitoring.
SAVE Score for Survival After Veno-Arterial ECMO (VA-ECMO)

Validated pre-ECMO score predicting in-hospital survival for patients requiring veno-arterial ECMO for refractory cardiogenic shock. Helps guide patient selection and family counselling.
PFO-Associated Stroke Causal Likelihood (PASCAL) Classification

Clinical classification system assessing likelihood that a patent foramen ovale (PFO) was the cause of cryptogenic stroke, to guide PFO closure decisions. Based on RoPE score and echocardiographic features.
RESCUE-IHCA Score for ECPR in In-Hospital Cardiac Arrest

Predicts favourable neurological outcome (CPC 1-2) after ECPR (extracorporeal CPR using VA-ECMO) for refractory in-hospital cardiac arrest. Helps guide appropriate patient selection for this resource-intensive intervention.
Gillmore Staging System for Transthyretin Amyloid Cardiomyopathy (ATTR-CM)

Three-stage clinical staging system for transthyretin amyloid cardiomyopathy (ATTR-CM) based on NT-proBNP and eGFR. Predicts median survival and guides treatment eligibility (tafamidis, CTRN gene silencers).
Bazett Corrected QT Interval (QTc) Calculator

Calculates heart rate-corrected QT interval (QTc) using the Bazett formula (most widely used clinically). Prolonged QTc is associated with risk of Torsades de Pointes and sudden cardiac death.
HAT (Haemorrhage After Thrombolysis) Score for Post-tPA Haemorrhage Risk

Predicts risk of symptomatic intracerebral haemorrhage (sICH) after IV tPA (alteplase) thrombolysis in acute ischaemic stroke. Calculated at admission, before tPA administration.
HOPE Score for Survival After ECMO in Cardiac Arrest (Hypothermia ECLS)

Predicts survival to hospital discharge for patients undergoing ECPR (extracorporeal CPR) for refractory cardiac arrest including accidental hypothermia. Validated for both hypothermic and normothermic ECPR patients.
ORBI Risk Score for Bleeding After Primary PCI in STEMI

Observatoire Regional Breton sur l Infarctus (ORBI) score predicts major bleeding risk after primary percutaneous coronary intervention (PPCI) for STEMI, to guide antiplatelet and anticoagulant therapy decisions.
READMITS Score for 30-Day Readmission Risk in Acute MI

Predicts 30-day all-cause hospital readmission after acute myocardial infarction (AMI) discharge. Validated to identify high-risk patients for intensive post-discharge follow-up and care transition support.
Steinhart Model for Acute Heart Failure in Undifferentiated Dyspnoea

Clinical prediction rule developed in the emergency department to diagnose acute heart failure (AHF) in adults presenting with acute dyspnoea when BNP is unavailable. Based on history and physical examination.
PCP-HF Risk Score (Pooled Cohort Equations to Prevent Heart Failure)

10-year risk prediction model for incident heart failure in patients without current HF. Uses clinical and laboratory variables to identify patients who may benefit from primary HF prevention strategies.
AUB-HAS2 Cardiovascular Risk Index

The American University of Beirut (AUB-HAS2) index predicts cardiovascular risk in Middle Eastern and Arab populations, accounting for sex differences. Validated as a region-specific alternative to Framingham.
Grogan Staging System for Transthyretin Amyloid Cardiomyopathy (ATTR-CM)

Alternative three-stage clinical staging for ATTR-CM using NT-proBNP and troponin T. Complements the Gillmore staging system; validated in the Mayo Clinic ATTR-CM cohort.
Composite Pulmonary Embolism Shock (CPES) Score

Identifies high-risk pulmonary embolism patients at risk for haemodynamic deterioration and cardiogenic shock requiring reperfusion (thrombolysis or embolectomy). Complements PESI and sPESI in intermediate-risk PE.
Cardiovascular Risk in Orthotopic Liver Transplantation (CAR-OLT) Score

Predicts major adverse cardiac events (MACE) within 30 days of orthotopic liver transplantation. Developed to guide pre-transplant cardiac evaluation and identify patients requiring intensive peri-operative cardiac management.
ORBIT Bleeding Risk Score for Anticoagulation in AF Patients

ORBIT (Outcomes Registry for Better Informed Treatment of Atrial Fibrillation) bleeding risk score for predicting major bleeding during anticoagulation for atrial fibrillation. Validated in over 7,400 AF patients.
Cardiac Output by Thermodilution (Fick Principle) Calculator

Calculates cardiac output, cardiac index, and stroke volume from invasive haemodynamic measurements. Uses the Fick principle (O2 consumption) or thermodilution (Swan-Ganz catheter).
EuroSCORE II

European System for Cardiac Operative Risk Evaluation II. Estimates operative mortality risk for adult cardiac surgery. Updated model from EuroSCORE I with improved calibration.
CAHP Score (Cardiac Arrest Hospital Prognosis)

Predicts 30-day mortality after out-of-hospital cardiac arrest (OHCA) to guide ICU admission and goals-of-care decisions.
EGSYS Score for Syncope

Evaluation of Guidelines in SYncope Study score. Identifies cardiac vs non-cardiac cause of syncope to guide investigation and risk stratification.
2023 Duke-ISCVID Criteria for Infective Endocarditis

Updated 2023 Duke-ISCVID criteria for diagnosis of infective endocarditis (IE), replacing the original 2000 Duke criteria. Incorporates PET/CT and new pathogen definitions.
ADHERE Algorithm for Acute Decompensated Heart Failure

Acute Decompensated Heart Failure National Registry (ADHERE) classification and regression tree. Predicts in-hospital mortality in patients admitted with ADHF using BUN, creatinine, and systolic BP.
Thakar Score for AKI after Cardiac Surgery

Predicts risk of acute kidney injury (AKI) requiring dialysis after cardiac surgery. Helps identify high-risk patients for preventive strategies.
CHADS-65 Score for Atrial Fibrillation

Canadian Cardiovascular Society simplified stroke risk score for atrial fibrillation. Recommends anticoagulation based on age ≥65 or any CHADS risk factor.
DAPT Score for Dual Antiplatelet Therapy Duration

Balances ischaemic benefit vs bleeding risk of prolonged dual antiplatelet therapy (DAPT) after drug-eluting stent (DES) placement. Guides decision to continue or stop DAPT after 12 months.
CART Score for Cardiac Arrest Risk Triage

Cardiac Arrest Risk Triage (CART) score. Predicts in-hospital cardiac arrest within 48 hours in ward patients. Enables early escalation to prevent avoidable arrests.
Canadian TIA Score

Predicts 7-day risk of stroke after TIA or minor stroke. Guides urgency of investigation and disposition from the emergency department.
Framingham Criteria for Heart Failure

Framingham Heart Study clinical criteria for the diagnosis of heart failure. Requires 2 major OR 1 major + 2 minor criteria for diagnosis. Remains widely used in clinical practice and research.
EUROMACS-RHF Score for Right Heart Failure after LVAD

Predicts right heart failure (RHF) after left ventricular assist device (LVAD) implantation. Identifies patients at high risk who may benefit from RVAD or early optimisation.
TIMI Risk Score for UA/NSTEMI

Thrombolysis in Myocardial Infarction (TIMI) risk score for Unstable Angina and Non-ST-elevation MI. Predicts 14-day risk of death, MI, or urgent revascularisation.
GRACE ACS Risk Score

Global Registry of Acute Coronary Events (GRACE) score. Predicts in-hospital and 6-month mortality in patients with ACS (STEMI, NSTEMI, UA). The recommended risk stratification tool in ESC NSTEMI guidelines.
SYNTAX Score for Coronary Artery Disease

Anatomical scoring system grading complexity of coronary artery disease on angiography. Guides decision between PCI and CABG in multivessel or left main disease.
ACC/AHA Pooled Cohort Equations (ASCVD Risk)

2013 ACC/AHA Pooled Cohort Equations. Estimates 10-year risk of first atherosclerotic cardiovascular disease (ASCVD) event. Guides statin therapy initiation per ACC/AHA guidelines.
CHARGE-AF Score for Incident Atrial Fibrillation

Cohort for Heart and Aging Research in Genomic Epidemiology (CHARGE) AF score. Predicts 5-year risk of developing new-onset atrial fibrillation in patients in sinus rhythm.
LVEF by Simpson Biplane Method

Simpson's biplane method of discs for measuring left ventricular ejection fraction (LVEF) on echocardiography. Gold standard 2D echo technique using apical 4-chamber and 2-chamber views.
SMART Risk Score for Recurrent CVD

Second Manifestations of ARTerial disease (SMART) risk score. Predicts 10-year risk of recurrent cardiovascular events in patients with established atherosclerotic vascular disease.
PREVENT Cardiovascular Risk Calculator (AHA 2023)

AHA 2023 PREVENT equations. Updated 10- and 30-year CVD risk prediction including heart failure. Incorporates eGFR, replaces race-specific coefficients, applicable ages 30–79.
MAGGIC Heart Failure Risk Score

Meta-Analysis Global Group in Chronic Heart Failure (MAGGIC) risk calculator. Predicts 1- and 3-year all-cause mortality in patients with heart failure (both HFrEF and HFpEF).
RV Systolic Pressure Estimation (RVSP)

Estimates right ventricular systolic pressure (RVSP) / pulmonary artery systolic pressure (PASP) from Doppler echocardiography using tricuspid regurgitation jet velocity. Normal PASP <35 mmHg.
LV Diastolic Dysfunction Grading (ASE/EACVI 2016)

2016 ASE/EACVI algorithm for grading left ventricular diastolic dysfunction using 4 variables: mitral annular e', E/e' ratio, left atrial volume index, and peak TR velocity.
TAPSE for RV Systolic Function

Tricuspid Annular Plane Systolic Excursion (TAPSE). Simple M-mode echocardiographic measure of RV longitudinal systolic function. Normal TAPSE ≥17 mm. Reduced TAPSE correlates with worse outcomes in PAH and right heart failure.
Wellens Syndrome ECG Pattern

Wellens' syndrome: ECG pattern in unstable angina indicating critical proximal LAD stenosis. Two patterns: Type A (biphasic T waves V2-V3) and Type B (deep symmetric T-wave inversions V2-V3). High risk of anterior MI without intervention.
IABP Timing Assessment

Intra-aortic balloon pump (IABP) timing assessment guide. Correct timing ensures optimal augmentation of diastolic pressure and afterload reduction. Identifies early/late inflation and deflation errors.
Lead aVR Sign for Left Main / Proximal LAD Occlusion

ST elevation in lead aVR (especially ≥1 mm) with diffuse ST depression in ≥6 leads is a high-risk ECG pattern suggesting left main coronary artery or proximal LAD occlusion. Associated with high mortality.
de Winter ECG Pattern for Proximal LAD Occlusion

de Winter's ECG pattern: STEMI-equivalent caused by proximal LAD occlusion but without ST elevation. Characterised by upsloping ST depression + tall peaked T waves in precordial leads. Requires immediate reperfusion.
HEART Score (Chest Pain Risk)

Rapid risk stratification for chest pain patients in ED. Predicts 30-day MACE (death, MI, revascularisation). Guides safe discharge vs admission.
Killip Classification (AMI Heart Failure)

Classifies clinical severity of heart failure complicating acute MI. Predicts in-hospital mortality and guides ICU admission decisions.
Pre-test Probability for Stable CAD (ESC 2019)

Estimates pre-test probability (PTP) of obstructive coronary artery disease in stable chest pain (ESC 2019 guidelines). Guides non-invasive testing.
Aortic Stenosis Severity Classification (ACC/AHA)

Classifies aortic stenosis severity from echocardiographic parameters per ACC/AHA 2021 guidelines. Guides timing of intervention (TAVI or SAVR).
DAPT Decision Tool (Ticagrelor vs Clopidogrel)

Guides choice of P2Y12 inhibitor in ACS/PCI. Ticagrelor preferred in high ischaemic risk; clopidogrel preferred in high bleeding risk.
GRACE Score (ACS Risk)

Global Registry of Acute Coronary Events (GRACE) score predicts in-hospital and 6-month mortality in ACS. Guides invasive vs conservative strategy.
WHO Functional Classification (Pulmonary Hypertension)

WHO/NYHA functional classification for pulmonary arterial hypertension. Guides treatment escalation and transplant listing criteria.
Pericarditis Diagnostic Score (Imazio Criteria)

Diagnoses acute pericarditis and stratifies for inpatient admission using Imazio high-risk criteria. Guides aspirin/NSAID + colchicine therapy.
Myocarditis Risk Assessment (ESC Criteria)

Identifies suspected myocarditis using ESC 2013 diagnostic criteria. Guides CMR, endomyocardial biopsy, and activity restriction.
SVT Termination Score and Adenosine Dosing

Guides assessment and management of narrow complex tachycardia (SVT/AVNRT) including vagal manoeuvres and adenosine dosing by body weight.
Cardiac Tamponade Assessment (Beck Triad)

Identifies cardiac tamponade using clinical signs and echocardiographic features. Guides urgent pericardiocentesis.
Brugada Syndrome Diagnostic Criteria

Identifies Brugada syndrome pattern on ECG — a cause of sudden cardiac death in structurally normal hearts. Guides electrophysiology referral and ICD consideration.
Long QT Syndrome (Schwartz Score)

Estimates probability of congenital Long QT Syndrome using Schwartz-Moss criteria. Guides genetic testing, beta-blocker therapy, and ICD consideration.
Fontan Circulation Risk Assessment

Assesses late complications of Fontan circulation in adults and children with single-ventricle physiology. Guides surveillance intensity and intervention timing.
PCSK9 Inhibitor Eligibility Assessment

Assesses eligibility for PCSK9 inhibitor therapy (evolocumab/alirocumab) per NICE TA394/TA385 criteria for high-risk cardiovascular patients.
QRISK3 — 10-Year Cardiovascular Risk

Approximates the QRISK3 (UK-validated) 10-year risk of myocardial infarction or stroke. NICE NG238 recommends QRISK3 for primary prevention statin decisions in adults 25–84 years. This calculator uses additive risk weights for clinical use; for the formal logistic model use the official QRISK3 web tool. Not validated in established CVD, T1DM, eGFR <30, or familial hypercholesterolaemia.