Final answer:
The heart at 60 beats per minute contracts and relaxes in a rhythmic cycle, with the ventricles pumping blood during systole and the chambers filling during diastole.
Step-by-step explanation:
At 60 beats per minute, the heart beats once every second. This means that the time between each beat is one second. For example, if you were to count the beats of your heart for one minute, you would count 60 beats. In terms of milliseconds, each beat at 60 beats per minute lasts for 1000 milliseconds. This can be calculated by dividing the total number of milliseconds in a minute, which is 60,000, by the number of beats per minute, which is 60.
At 60 beats per minute, the heart beats once every second. Each beat consists of a contraction (systole) and relaxation (diastole) phase. During systole, the ventricles contract, pumping blood out of the heart, while during diastole, the heart muscle relaxes and the chambers fill with blood. Precisely measuring the time interval between beats, one can determine the heart's efficiency and performance under resting conditions, which is important for assessing cardiovascular health.