What is the heart pumping blood?

Hello! The systolic and diastolic function of our heart is work ejection, and the evaluation of pumping function is measured by ejection volume, or by ejection volume once or 1 min.

Cardiac pumping function parameters

1. Stroke output: the blood volume discharged by a ventricular contraction,

About 70ml.

2. Output per minute (cardiac output): The amount of blood discharged by a ventricular contraction per minute is about 5000ml/min.

3. Ejection fraction: the percentage of stroke volume to ventricular end-diastolic volume is about 55-65%.

4. Heart index: cardiac output per minute per square meter of body surface area during quiet fasting,

3.0-3.5 liters/minute. square meter.

5. Division of stroke work and work: The work done by left ventricular contraction is called stroke work. Stroke work = (left ventricular pressure at ejection-left ventricular end diastolic pressure) × left ventricular pressure at ejection.

Work per minute (work per minute) refers to the work done by the ventricle every minute. Divided work = stroke work × heart rate.

(2) The pumping activity of the heart is regulated by nerve and body fluid factors as well as its own factors.

Cardiac output = stroke output

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Heart rate (click

Heart rate refers to the number of heartbeats per minute, and normal adults are about 60- 100 times per minute at rest. Stroke volume is mainly related to cardiac preload (cardiac preload refers to the load borne by the ventricle before contraction, usually reflected by the end-diastolic pressure or volume of the ventricle), myocardial contraction force and afterload (afterload refers to the load borne by the ventricle during contraction, usually reflected by arterial blood pressure).