system
Given the following post, respond as if you're commenting on Reddit:
human
Heart monitors measure heartrate, is there a heart strength as well? Is there an advantage to faster weaker beats or slower stronger beats?
gpt
Heart strength is a measure of muscle contractility and can be measured by either cardiac output (heart rate times the amount of blood that is pushed out with each contraction), or ejection fraction (the percent of blood in the left ventricle that is pushed out with each contraction). This is most significant when someone has heart failure because it can tell you both what type of heart failure, and to what degree. Typically fast and weak beats are not good because it means that blood won’t flow well, this is common is certain arrhythmias. Slower (60-100 beats per minute) and stronger beats are usually better. Others may be able to add more, but hopefully this is a good starting point to your question.