This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.
Cardiology
16 calculators · blood pressure, ABPM, QTc, echo z-scores, coronary arteries in Kawasaki disease, hemodynamics
Here you will find calculators for pediatric cardiology: blood pressure percentiles according to the KiGGS reference and AAP tables, 24-h blood pressure (ABPM) according to Wühl 2002, vital signs by age, QTc according to Bazett, Fridericia, Hodges and Framingham, and ECG normal values. In addition there are echo z-scores according to Pettersen 2008, the coronary artery z-score in Kawasaki syndrome, the modified Ross score in heart failure and hemodynamic calculators such as MAP, fractional shortening, ejection fraction, cardiac output, cardiac index and stroke volume. The calculators are intended for interpreting measurements from practice, ECG and echocardiography. Each calculator states its formula and sources.
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Blood pressure percentiles
Systolic and diastolic by age, sex and height – KiGGS and AAP 2017 -
Vital signs by age
Heart rate, respiratory rate and systolic blood pressure – acceptable ranges for unwell children (RCH Melbourne) -
QTc calculator
QT interval and heart rate → QTc according to Bazett, Fridericia, Hodges and Framingham, with pediatric reference values -
ECG reference values
Heart rate, QTc and R amplitude in V6 by age and sex – reference work with classification of your own values -
Echo z-scores
Z-scores of echocardiographic measures from body surface area and measured value – Pettersen 2008 (21 structures), Kampmann 2000 (M-mode) -
Mean Arterial Pressure (MAP)
Mean arterial pressure from systolic and diastolic pressure -
Pulse pressure
Systolic minus diastolic pressure – with proportion of the systolic pressure -
Fractional Shortening (FS)
From LVEDD and LVESD – with Teichholz ejection fraction -
Ejection fraction
From end-diastolic and end-systolic volume (Simpson) or from diameters (Teichholz) -
Cardiac Output (CO)
Stroke volume × heart rate – from volumes or from Doppler (VTI × LVOT area) -
Cardiac Index (CI)
Cardiac output per m² body surface area – with reference range for children -
Stroke Volume (SV)
From EDV − ESV, from cardiac output ÷ heart rate or from Doppler -
Stroke Volume Index (SVI)
Stroke volume per m² body surface area -
24-h blood pressure (ABPM) – percentiles and classification
Reference values by height or age (Wühl 2002) for 24 h, day and night; classification according to AHA 2022 including dipping -
Coronary artery z-score (Kawasaki syndrome)
Z-score of the internal diameter of LMCA, LAD, LCx and RCA according to Dallaire 2011, McCrindle 2007 or Olivieri 2009 – with AHA 2017 classification -
Modified Ross score (heart failure)
Sweating, tachypnea, respiration, age-related respiratory and heart rate, liver size – 0–12 points, classes I–IV
Frequently asked questions
How do I assess blood pressure in children by percentiles?
The blood pressure percentile calculator classifies a measured value by age, sex and height against the German KiGGS reference (percentile, z-value, P50/P90/P95/P99) and against the AAP tables. The calculator states the sources.
How do I calculate the QTc interval in children?
The QTc calculator calculates the QTc according to Bazett, Fridericia, Hodges and Framingham from QT interval and heart rate or RR interval and provides pediatric normal values by age and sex. The formulas are documented.
How do I calculate the coronary artery z-score in Kawasaki disease?
The coronary artery z-score calculates the body surface area-adjusted z-score of a coronary artery internal diameter according to the equations of Dallaire & Dahdah 2011 (Montreal, 6 segments) and other stored references. The calculator lists the sources.