Heart index

The heart index (HI), also English. cardiac index (CI) is a parameter for assessing cardiac output and is calculated as the quotient of cardiac output (cardiac output, measured in liters per minute) and the body surface area (measured in square meters ). The unit is l / min / m ² [correct (l / min) / m ² = l / m ² min = mm / min]. The cardiac index plays an important role in monitoring the hemodynamics and circulatory data of patients in intensive care units . The heart index can e.g. B. measured with the help of a PiCCO .

calculation

${\displaystyle \mathrm {HI} ={\frac {\mathrm {HMV} }{\mathrm {K{\ddot {O}}} }}={\frac {\mathrm {SV} \cdot \mathrm {HF} }{\mathrm {K{\ddot {O}}} }}}$

With

HI = heart index = HZV / KOF = CO / BSA = (English) Cardiac Index = CI

HMV = cardiac output = CO = cardiac output = (English) Cardiac output = CO = stroke volume × heart rate = cardiac output  : blood pressure = blood pressure: peripheral resistance

KÖ = body surface area = KOF = (English) Body Surface Area = BSA

SV = stroke volume = cardiac work  : blood pressure = end-diastolic cavity volume × net ejection fraction

HR = heart rate = cardiac output: cardiac work = 1: heartbeat duration = cardiac output: stroke volume

Normal values

The literature gives 2.5 to 4 (l / min) / m ² as normal values ​​for the cardiac index . The limit values ​​of the heart index in adults are between 1.2 and 5.5 mm / min. The stroke volume index fluctuates between 22 and 48 ml / m ² in women and between 28 and 52 ml / m ² in men . This stroke volume index is the quotient of stroke volume and body surface.

rating

An increase in the heart index occurs in the case of tachycardia , the onset of sepsis , fever , anemia or hyperthyroidism .

A decrease in the cardiac index occurs in hypovolemia , in cardiogenic shock , in hypothyroidism and in heart failure .

Individual evidence

1. ↑ ^{a b} M. Leuwer, H. Trappe, T. Schürmeyer, O. Zuzan: Checklist Interdisciplinary Intensive Care Medicine ; 2nd edition, Stuttgart, New York 2004, Georg Thieme Verlag , ISBN 3-13-116912-5 .
2. ^ Georg Sabin: The cardiogenic shock , Verlag W. Kohlhammer , Stuttgart, Berlin, Cologne, Mainz 1984, ISBN 3-17-008618-9 , p. 17.
3. ↑ Ekkehard Köhler: One- and two-dimensional echocardiography with Doppler technique , Ferdinand Enke Verlag , 4th edition, Stuttgart 1990, ISBN 3-432-91514-4 , p. 68.
4. ^ Georg Sabin: Der kardiogene Schock , Verlag W. Kohlhammer , Stuttgart, Berlin, Cologne, Mainz 1984, ISBN 3-17-008618-9 , pp. 18-21.

This article is about a health issue. It is not used for self-diagnosis and does not replace a diagnosis by a doctor. Please note the information on health issues !