What does CO mean? Cardiac color ultrasound examination report form

Output per minute (CO).

1. Output per minute refers to the total amount of blood ejected from one ventricle per minute. The output of the left and right ventricles is essentially equal. The blood volume output by each beat of the ventricle is called stroke volume, which is approximately 70 ml (60~80 ml) when the human body is at rest.

2. If the heart rate is an average of 75 beats per minute, the blood volume output per minute is about 5000 ml (4500~6000 ml), that is, the output per minute.

Left ventricular end-systolic volume (LVES), end-diastolic volume (LVED), left ventricular diameter shortening rate (FS), heart rate (HR), left atrium (LA), left ventricular ejection fraction ( EF) Pulse output volume (SV) and output per minute (CO).

Extended information:

1. Humoral factors are mainly certain hormones and some vasoactive substances that affect cardiovascular activity through blood circulation, thus leading to changes in cardiac output. Angiotensin II can cause venous contraction and increase venous return, thereby increasing cardiac output.

2. Thyroxine (T4 and T4) can accelerate the heart rate, enhance cardiac contractility, and increase output. In conditions such as ischemia, hypoxia, acidosis, and heart failure, myocardial contractility weakens and functional capacity decreases, so cardiac output decreases.

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