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Cardiology Calculators

Cardiology calculators help healthcare professionals assess heart-related functions, risks, and treatments with accuracy and speed. These tools support decision-making in clinical cardiology, from estimating cardiac output and heart rate to predicting cardiovascular risk and medication dosing.

TIMI Risk Index

This calculator estimates the TIMI Risk Index, a simple bedside score used to assess the risk of mortality in patients with ST-elevation myocardial infarction (STEMI). Based on age, heart rate, and systolic blood pressure, it helps clinicians quickly evaluate a patient’s prognosis and prioritize interventions.

Target Heart Rate

This Target Heart Rate Calculator helps determine the optimal pulse range during physical exercise based on your age and resting heart rate. It’s particularly useful for athletes, fitness enthusiasts, and health professionals to monitor cardiovascular intensity and ensure workouts remain within a safe and effective zone.

Right Ventricular Stroke Work Index

This calculator estimates the Right Ventricular Stroke Work Index (RVSWI), a key hemodynamic parameter used to assess right ventricular performance in patients with heart failure, pulmonary hypertension, or undergoing cardiac surgery. It uses stroke volume index (SVI) and mean pulmonary artery pressure (MPAP) to calculate the RVSWI value.

QTc Interval

This QTc Interval Calculator helps estimate the corrected QT interval (QTc) from the measured QT interval and heart rate (HR). It is commonly used in cardiology to assess risk for arrhythmias like Torsades de Pointes. By inputting QT duration and heart rate, the tool applies Bazett’s formula to provide the QTc value.

Pulmonary Vascular Resistance

This Pulmonary Vascular Resistance (PVR) calculator estimates the resistance offered by the pulmonary vasculature using mean pulmonary artery pressure (PAP), pulmonary capillary wedge pressure (PCWP), and cardiac output (CO). It is useful for healthcare professionals to assess conditions like pulmonary hypertension and right heart dysfunction.

Mean Arterial Pressure

MAP is a critical value in assessing adequate blood flow to vital organs, especially in patients with sepsis, shock, or head injury. Typically, a MAP of at least 60 mmHg is required to maintain perfusion to organs. For example, a patient with SBP of 120 mmHg and DBP of 80 mmHg would have a MAP of (120 + 2×80)/3 = 93.3 mmHg. This tool simplifies the manual calculation process and helps in making quick clinical decisions.

Intermittent Claudication Risk Score

This Intermittent Claudication Risk Score Calculator helps assess the likelihood of developing symptoms of peripheral artery disease (PAD) over the next 4 years. Based on risk factors such as age, cholesterol, hypertension, diabetes, smoking, and coronary heart disease (CHD), it estimates the probability of experiencing intermittent claudication, a key indicator of early-stage PAD. A higher score indicates greater risk.

Corrected QT Interval (QTc)

The Corrected QT (QTc) Interval Calculator helps estimate the heart’s electrical recovery time adjusted for heart rate. It’s especially useful for evaluating patients with potential arrhythmias or on medications that prolong QT interval. Enter QT and R-R interval to get QTc using Bazett’s formula.

Heart Blood Volume

The Heart Blood Volume Calculator helps estimate the total volume of blood pumped by the heart over time, based on your heart rate and expected lifespan. It provides values in gallons, liters, and barrels, as well as a breakdown by year, month, week, and day. This tool is useful for educational, physiological, or health-awareness purposes.

Framingham Heart Disease Risk

This calculator estimates the 10-year risk of developing cardiovascular disease (CVD) using the Framingham Risk Score model. It evaluates factors such as age, gender, cholesterol levels, blood pressure, smoking, and diabetes status to provide a percentage-based risk of heart attack or related events in adults over 20 years old.

Ejection Fraction

A simple and effective tool to calculate Left or Right Ventricular Ejection Fraction (EF) based on stroke volume and end-diastolic volume. This calculator helps assess heart function by determining the percentage of blood ejected from the ventricles during each heartbeat. It’s particularly useful for cardiologists, healthcare providers, and patients monitoring cardiac performance.

Framingham Stroke Risk

This Framingham Stroke Risk Calculator estimates the 10-year probability of stroke based on clinical data including age, gender, blood pressure, smoking status, diabetes, cardiovascular conditions, and use of antihypertensive treatment. It’s a valuable tool for healthcare professionals and patients to assess and monitor stroke risk in both men and women.

CHA₂DS₂-VASc Score

The CHA₂DS₂-VASc Score is a clinical tool used to estimate the risk of stroke in patients with non-valvular atrial fibrillation (AF). This calculator helps healthcare providers determine whether anticoagulation therapy is recommended. Based on risk factors such as age, gender, and medical history, a higher score indicates a greater stroke risk.

Cardiac Output (Fick Method)

This calculator estimates cardiac output in liters per minute using the Fick method. It is especially useful for clinicians to assess the pumping efficiency of the heart based on oxygen consumption, hemoglobin concentration, and oxygen saturation. By inputting the patient’s body surface area (BSA), hemoglobin (Hgb), arterial (SaO₂) and venous (SvO₂) oxygen saturation, you can get a non-invasive approximation of cardiac output.

Aortic Valve Area

This calculator helps healthcare professionals and caregivers determine how many solid medication tablets to administer based on the prescribed dose and the available dosage strength. It’s especially useful in clinical and pharmacy settings where accurate medication dosing is crucial for patient safety.