Heart throb

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Cardiac output, minute capacity, CO, Q (cardiac output) - the volume of blood the heart pumps in one minute to the blood vessels. It is a product of heart rate (HR) and discharge volume (SV).

C O = S V & # x2217; H R {\displaystyle CO=SV*HR}

Normal heart rate in a healthy man is about 5000-6000 ml. For comparative purposes, it is converted to 1 m of body surface, forming a so-called cardiac index (its normal value is 3000-3500 ml / m).

Heart rate and peripheral resistance determine the mean blood pressure. Heart rate is one of the most important haemodynamic parameters.

Its marking is difficult and in most cases associated with a large invasiveness of the test. The most widely used method is thermodilution using a Swan-Ganz catheter inserted into the pulmonary artery. Due to the large number of complications (often fatal), numerous modifications of this method have been introduced in recent years, utilizing thrombosis. Technological progression can now be monitored continuously by means of algorithms that analyze the contour of the arterial waveform after the initial value by thermodilution. Other methods of cardiopulmonary resection (Doppler measurements, Fick method, dye dilution methods) are too large to be used for clinical practice.

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