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Immune Checkpoint Inhibitor Myocarditis Risk Index Calculator

Immune Checkpoint Inhibitor Myocarditis Risk Index: Explanation and Clinical Context This risk index is derived from a multicenter study involving 748 patients treated with immune checkpoint inhibitors (ICIs). The index incorporates five key factors: presence of active thymoma, cardio-muscular symptoms, low QRS voltage on electrocardiogram, left ventricular ejection fraction (LVEF) <50%, and elevated troponin levels.

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Implantation Date Estimator Calculator

Implantation Date Estimator Explanation and Clinical Context Implantation represents the moment when a fertilized egg attaches to the endometrial lining and begins early embryonic development. This physiological process usually occurs within a predictable biological window that follows ovulation. Most studies show that implantation generally happens between day six and day ten after ovulation. These values form the b

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IMPROVE VTE Risk Score Calculator

IMPROVE VTE Risk Score: Explanation and Clinical Context The IMPROVE VTE Score is a validated clinical tool designed to predict the risk of venous thromboembolism (VTE) in hospitalized medical patients. It is based on simple clinical variables including previous VTE, known thrombophilia, current cancer, lower limb paralysis, immobilization >7 days, ICU or CCU stay, and age >60 years. Points are assigned according to

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Inflammatory Activity Score (Pericarditis Biomarkers) Calculator

Inflammatory Activity Score (Pericarditis Biomarkers): Explanation and Clinical Context The Inflammatory Activity Score is a simplified clinical tool designed to quantify the degree of systemic inflammation in patients with acute pericarditis using standard laboratory biomarkers, including C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), and white blood cell count (WBC). This score assigns one point fo

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Initial ACS ECG Triage 10 Minutes Action Tool

Initial ACS ECG Triage Ten Minutes Action Tool Explanation and Clinical Context This tool is designed to support rapid triage of patients with suspected acute coronary syndrome at the point of first medical contact or emergency department arrival. The twenty twenty five ACC AHA guideline recommends that a twelve lead ECG be acquired and interpreted within ten minutes for patients with possible acute coronary syndrome

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Inotrope-Induced Renal Improvement (IRI) Index Calculator

Inotrope-Induced Renal Improvement (IRI) Index: Explanation and Clinical Context The IRI Index is a predictive tool designed to assess renal function improvement in patients receiving inotropic therapy, particularly in the context of acute decompensated heart failure or cardiogenic shock. It integrates the change in serum creatinine over the first 48 hours of therapy (ΔCreatinine) with the cardiac index achieved duri

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InsCor Model (Brazilian Cardiac Surgery Score) Calculator

InsCor Model (Brazilian Cardiac Surgery Score): Explanation and Clinical Context The InsCor model is a validated scoring system developed in Brazil to estimate in-hospital mortality risk for patients undergoing cardiac surgery. It considers simple preoperative variables such as age >70 years, female gender, preoperative renal failure, and type of surgery (CABG, valve, or combined CABG + valve). Each variable is assig

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INSPIRE Index (Insulin Sensitivity Prognosis) Calculator

INSPIRE Index (Insulin Sensitivity Prognosis): Explanation and Clinical Context The INSPIRE Index is a prognostic tool used to estimate insulin sensitivity and risk of progression to metabolic and cardiovascular complications. It is calculated using fasting plasma glucose and fasting insulin, based on the HOMA-IR model. A lower INSPIRE Index indicates higher insulin sensitivity and lower cardiometabolic risk, whereas

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Insulin to Carbohydrate Ratio Calculator

Insulin to Carbohydrate Ratio Explanation and Clinical Context Insulin to Carbohydrate Ratio represents the estimated amount of carbohydrate covered by one unit of rapid acting insulin. It is commonly calculated using the empirical five hundred rule which divides five hundred by the total daily insulin requirement. This approach assumes a predictable relationship between daily insulin needs and postprandial glucose r

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Integrated Discrimination Improvement (IDI) Calculator

Integrated Discrimination Improvement (IDI): Explanation and Clinical Context Integrated Discrimination Improvement (IDI) is a metric used to evaluate the improvement in risk prediction offered by a new model compared with a baseline model. It quantifies the change in predicted probabilities for events and non-events, measuring how much better a new model separates patients who experience an event from those who do n

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INTERMACS Profile Calculator (Advanced HF, LVAD Consideration)

INTERMACS Profile: Explanation and Clinical Context The INTERMACS (Interagency Registry for Mechanically Assisted Circulatory Support) Profile system is a standardized classification scheme to describe the clinical severity of advanced heart failure. It stratifies patients into seven profiles (1–7) ranging from critical cardiogenic shock to advanced but stable NYHA class III disease. Profiles 1–3 represent patients w

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IRAD Risk Score (Aortic Dissection) Calculator

IRAD Risk Score (Aortic Dissection): Explanation and Clinical Context IRAD Risk Score is a validated clinical tool to assess the probability of acute aortic dissection (AAD) in patients presenting to emergency departments. It is based on three domains: predisposing conditions (such as Marfan syndrome, aortic aneurysm, or chronic hypertension), pain characteristics (abrupt onset, severe intensity, and migrating nature

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ISAR-TRIPLE Antiplatelet Duration Algorithm

: clinical context and explanation The ISAR-TRIPLE randomized trial compared two durations of triple therapy (aspirin + clopidogrel + oral anticoagulant) in patients undergoing drug-eluting stent implantation who required chronic oral anticoagulation. At 9 months the composite primary endpoint (death, myocardial infarction, definite stent thrombosis, stroke, or TIMI major bleeding) did not differ significantly betwee

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iScore (Stroke Mortality) Calculator

iScore (Stroke Mortality): Explanation and Clinical Context iScore is a validated clinical risk score designed to predict short-term mortality in patients with acute stroke, including ischemic stroke and intracerebral hemorrhage. Developed by Austin et al. using Canadian Stroke Network data, iScore incorporates age, stroke type, Glasgow Coma Scale, and key comorbidities such as diabetes, atrial fibrillation, and hear

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IV Drip Rate Calculator for Infusion

Explanation and Clinical Context This IV drip rate calculator for infusion converts a prescribed intravenous volume, administration time, and tubing drop factor into a practical infusion rate in milliliter per hour and a drip rate in drops per minute. In the acute coronary syndrome setting, accurate intravenous dosing of antithrombotic agents, vasodilator therapy, and other cardioprotective drugs is essential to bala

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IV Flow Rate and Infusion Speed Calculator

Explanation and Clinical Context IV flow rate represents the amount of fluid delivered into the patient circulation over one minute and this value is essential to maintain adequate hydration electrolyte replacement and drug administration safety. Calculation requires three components which are total volume in milliliter infusion duration in minutes and drop factor in gtt per mL which depends on the type of IV set use

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IVF Based Estimated Date of Delivery Calculator

Date of Egg Retrieval or Fertilization Embryo Transfer Type Select Type Fresh transfer Day three embryo Fresh transfer Day five embryo Frozen transfer Day three embryo Frozen transfer Day five embryo IVF Based Estimated Date of Delivery Explanation and Clinical Context Estimated Date of Delivery in pregnancies achieved through in vitro fertilization follows a more accurate methodology because the exact timing of fert

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JBS3 Risk Calculator

: Comprehensive Explanation and Clinical Context The Joint British Societies' (JBS3) Risk Calculator is a cardiovascular risk assessment tool designed to estimate the 10-year and lifetime risk of developing major cardiovascular events such as myocardial infarction or stroke. It incorporates key parameters including age, sex, systolic blood pressure, cholesterol levels, diabetes status, and smoking behavior. Unlike tr

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Jelliffe Renal Function Equation Calculator

Jelliffe renal function equation Explanation and clinical context The Jelliffe equation estimates creatinine clearance in adults from age 20 to 80 years by combining an age dependent production term with measured serum creatinine and body surface area. The equation adjusts for sex by applying a ten percent reduction for female sex to reflect lower creatinine production. In this implementation serum creatinine may be

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JTc Interval Calculator

JTc Interval: Explanation and Clinical Context The JTc interval represents the corrected JT interval, calculated as the QT interval minus QRS duration, adjusted for heart rate. It isolates ventricular repolarization from depolarization, offering a more precise assessment than QTc in patients with wide QRS complexes. Normal values are generally <330 ms for men and <340 ms for women. Prolonged JTc is associated with an

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Kansas City Cardiomyopathy Questionnaire (KCCQ) Calculator

Kansas City Cardiomyopathy Questionnaire (KCCQ): Explanation and Clinical Context The KCCQ is a validated, patient-reported outcome measure assessing physical limitation, symptom frequency, quality of life, and social limitation in patients with heart failure. Scores range from 0 to 100, with higher scores indicating better health status and lower symptom burden. The Overall Summary Score is the average of the domain

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Kawasaki Disease Coronary Z-score Calculator

Kawasaki Disease Coronary Z-score: Explanation and Clinical Context The Kawasaki Disease Coronary Z-score is a standardized metric that quantifies coronary artery dilation relative to body surface area (BSA) in pediatric patients. It is calculated by comparing the measured coronary artery diameter to the predicted mean diameter for a given BSA, normalized by the standard deviation (SD) derived from population-based r

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Kawasaki Disease IVIG Resistance (Harada Variant) Calculator

Kawasaki Disease IVIG Resistance (Harada Variant): Explanation and Clinical Context The Harada score is a clinical prediction tool developed to identify patients with Kawasaki Disease (KD) who are at increased risk of resistance to intravenous immunoglobulin (IVIG) therapy. IVIG resistance occurs in approximately 10–20% of KD patients and is associated with persistent fever, prolonged inflammation, and higher risk of

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Kawashima Operation Survival Index Calculator

Kawashima Operation Survival Index: Explanation and Clinical Context The Kawashima Operation Survival Index is a risk prediction tool used to estimate long-term survival probability for patients undergoing the Kawashima procedure, typically for patients with single ventricle physiology and interrupted inferior vena cava with azygos continuation. It incorporates key clinical variables including age at surgery, preoper

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KCNQ1 KCNH2 Mutation Severity Classifier

KCNQ1 / KCNH2 Mutation Severity Classifier: background and clinical context This classifier synthesizes information about variant type (truncating vs missense vs CNV), protein location (pore, voltage sensor, transmembrane, regulatory domains), predicted functional effect (loss-of-function, dominant-negative, gain-of-function), and clinical phenotype (QTc duration, syncope, cardiac arrest, family sudden cardiac death)

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KDIGO Cardiovascular Comorbidity Risk Stratification Calculator

KDIGO Cardiovascular Comorbidity Risk Stratification: Explanation and Clinical Context The KDIGO cardiovascular comorbidity risk stratification framework integrates albuminuria and estimated glomerular filtration rate (eGFR) to assess cardiovascular risk in patients with chronic kidney disease (CKD). This approach emphasizes the importance of kidney function and albuminuria as significant factors influencing cardiova

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Khorana Score (Cancer-Associated Thrombosis) Calculator

Khorana Score: Explanation and Clinical Context The Khorana Score is a validated risk assessment model for predicting cancer-associated thrombosis (CAT) in ambulatory patients with cancer. It assigns points based on five clinical variables: site of cancer, platelet count > 350 ×10^9/L, hemoglobin < 10 g/dL or use of erythropoiesis-stimulating agents, leukocyte count > 11 ×10^9/L, and BMI > 35 kg/m². Scores classify p

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Kidney Damage Risk Index (KDRI-H) Calculator

Kidney Damage Risk Index in Hypertension (KDRI-H): Explanation and Clinical Context KDRI-H is a validated concept for estimating the risk of chronic kidney damage in patients with hypertension. It incorporates clinical and laboratory parameters such as age, systolic and diastolic blood pressure, estimated glomerular filtration rate (eGFR), and proteinuria. The index allows clinicians to stratify patients into low, mo

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Killip Classification Severity Tool for ACS

Killip Classification Severity Tool for Acute Coronary Syndrome: Explanation and Clinical Context The Killip classification is a bedside clinical scale that grades the severity of heart failure in the setting of acute myocardial infarction and acute coronary syndrome using simple physical examination findings including pulmonary rales third heart sound jugular venous pressure acute pulmonary edema and cardiogenic sho

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Kocher Criteria Septic Arthritis Calculator

Kocher Criteria for Septic Arthritis Explanation and Clinical Context Kocher Criteria were developed to help clinicians estimate the likelihood of septic arthritis in children presenting with acute hip pain. The system uses four clinical predictors which are history of fever inability to bear weight erythrocyte sedimentation rate above forty mm per hour and serum white blood cell count above twelve thousand per micro

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KOOS Knee Outcome Score Calculator

KOOS Knee Outcome Score Explanation and Clinical Context The Knee injury and Osteoarthritis Outcome Score is a validated multidimensional instrument that evaluates patient perceived knee health across five subscales. These domains include pain symptoms daily living function sport and recreation function and knee related quality of life. Each subscale is transformed to a zero to one hundred scale in which one hundred

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LA Volume Index (LAVI) Calculator

Left Atrial Volume Index (LAVI): Explanation and Clinical Context LAVI represents the left atrial volume indexed to body surface area and serves as a reliable marker of chronic diastolic burden. Enlargement of the left atrium occurs gradually as a consequence of prolonged elevation of left ventricular filling pressure. Because of this, LAVI is considered a structural biomarker that reflects chronic diastolic dysfunct

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LA Volume Severity Index (HCM) Calculator

Left Atrial (LA) Volume Severity Index in Hypertrophic Cardiomyopathy (HCM): Explanation and Clinical Context The Left Atrial Volume Index (LAVI) is calculated as the left atrial volume (LAV) divided by the body surface area (BSA), providing a body size–adjusted measure of LA enlargement. LA enlargement in HCM reflects chronic diastolic dysfunction, elevated left ventricular filling pressures, and contributes to risk

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LAA Closure Device Selection Index Calculator

LAA Closure Device Selection Index: Explanation and Clinical Context The LAA Closure Device Selection Index is a composite score designed to assist clinicians in selecting the most appropriate left atrial appendage (LAA) closure device based on patient-specific factors. This index incorporates the CHA₂DS₂-VASc score, HAS-BLED score, LAA diameter, and LAA depth to provide a tailored recommendation for device selection

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LAA Thrombus Detection Index (TEE-based, CLOTS-AF) Calculator

LAA Thrombus Detection Index (TEE-based, CLOTS-AF): Explanation and Clinical Context The CLOTS-AF score estimates the probability of left atrial appendage thrombus (LAAT) before cardioversion or ablation in atrial fibrillation or flutter, integrating six routinely measured parameters: serum creatinine, LVEF, LAVI, TAPSE, prior ischemic stroke/TIA, and rhythm at imaging. This index was derived in patients undergoing T

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LAAO CHA2DS2-VASc HAS-BLED Hybrid Index Calculator

Left Atrial Appendage Occlusion (LAAO) – CHA₂DS₂-VASc / HAS-BLED Hybrid Index Enter patient data. Use 1 = yes / 0 = no for binary fields. Age is in years; Sex is M or F. LAAO CHA₂DS₂-VASc / HAS-BLED Hybrid Index: Explanation and Clinical Context This calculator combines stroke and bleeding risk scores to guide consideration of left atrial appendage occlusion (LAAO). Patients with high CHA₂DS₂-VASc (≥2 in men, ≥3 in w

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LAAO Stroke Risk Estimation Calculator

CHA₂DS₂-VASc Score: Explanation and Clinical Context The CHA₂DS₂-VASc score is a clinical tool used to estimate the risk of stroke in patients with atrial fibrillation. It incorporates factors such as age, sex, and the presence of comorbid conditions like heart failure, hypertension, diabetes mellitus, and vascular disease. A higher score indicates a greater risk of stroke, guiding clinicians in decision-making regar

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Lactate Clearance Index Calculator

Lactate Clearance Index: Explanation and Clinical Context Lactate Clearance Index represents the rate at which elevated blood lactate levels decline over time following resuscitation efforts. It reflects the balance between tissue oxygen delivery and utilization, and thus serves as a dynamic marker of global tissue perfusion. A higher clearance indicates effective resuscitation and improved prognosis, while persisten

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LAMS (Los Angeles Motor Scale) Calculator

Los Angeles Motor Scale (LAMS): Explanation and Clinical Context The Los Angeles Motor Scale (LAMS) is a rapid prehospital stroke assessment tool designed to predict the likelihood of a large vessel occlusion (LVO) in patients presenting with acute neurological deficits. It evaluates three motor domains: facial droop, arm drift, and grip strength. Each domain is scored individually (Facial: 0–1; Arm: 0–2; Grip: 0–1),

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Lawton IADL Scale Calculator

Lawton Instrumental Activities of Daily Living (IADL) Scale: Explanation and Clinical Context The Lawton IADL Scale assesses a person's ability to perform complex activities necessary for living independently in the community. It evaluates eight domains: ability to use telephone, shopping, food preparation, housekeeping, laundry, transportation, responsibility for own medications, and ability to handle finances. Each

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LDL/ApoB Ratio (Atherogenic Risk) Calculator

LDL/ApoB Ratio: Explanation and Clinical Context The LDL/ApoB ratio is a surrogate marker for LDL particle size and atherogenicity. LDL cholesterol measures the cholesterol content within LDL particles, while ApoB counts the number of atherogenic particles. A lower LDL/ApoB ratio indicates smaller, denser LDL particles, which are more prone to penetrate the arterial wall, become oxidized, and promote atherosclerosis.

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LDLR Variant Severity Score Calculator

LDLR Variant Severity Score: Explanation and Clinical Context The LDLR Variant Severity Score is a tool developed to predict phenotypic severity in patients with familial hypercholesterolemia (FH) based on LDLR genetic variant type, LDL-C level, and the presence of tendon xanthomas. This scoring system integrates functional classification of LDLR variants (null, defective, or mild), biochemical phenotype (LDL-C conce

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LECOM (Lead Extraction COMplexity) Score Calculator

LECOM (Lead Extraction COMplexity) Score: Explanation and Clinical Context The LECOM score is a predictive tool developed to assess the complexity of transvenous lead extraction (TLE) procedures. It incorporates clinical and procedural factors to estimate the likelihood of a difficult extraction. The score is calculated based on the following parameters: - Age at First CIED Implantation: Patients implanted before 51

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Lee’s Cardiac Risk Index (Original RCRI) Calculator

Ischemic Heart Disease (history of MI/positive stress test/current angina/use of nitrates/pathological Q waves) Check if present Congestive Heart Failure (history or signs/symptoms consistent with CHF) Check if present Cerebrovascular Disease (history of stroke or TIA) Check if present Diabetes Mellitus on Insulin Check if patient uses insulin Serum Creatinine mg/dL µmol/L Threshold for RCRI point: > 2.0 mg/dL (≈ > 1

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Left Atrial Pressure (LAP) Calculator

Left Atrial Pressure LAP Explanation and Clinical Context Left atrial pressure represents the pressure within the left atrium and provides an indirect assessment of left ventricular filling pressures. Echocardiography offers a non invasive method to estimate LAP through the ratio between transmitral early filling velocity and early diastolic mitral annular velocity. The E over e average ratio is strongly correlated w

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Left Ventricular Cavity Size Index for Athletes (BSA-adjusted) Calculator

Left Ventricular Cavity Size Index for Athletes (BSA-adjusted): Explanation and Clinical Context The Left Ventricular (LV) Cavity Size Index is calculated by dividing the LV end-diastolic dimension (LVEDD) by body surface area (BSA). This index normalizes cardiac size to body size, allowing better differentiation between physiological enlargement due to athletic training and pathological dilation seen in cardiomyopat