Title What is baseballâs âmodern eraâ? The start of the 20th century might not seem particularly modernâafter all, there were only 45 states in the Union, hardly anyone owned a car (the Model T didnât debut until 1908) and William McKinley, a Civil War vet, occupied the White House.
Sinus tachycardia is a normal increase in the heart rate. How it happens. The sinoatrial (SA) node --- the heart's natural pacemaker-sends out electrical signals faster than usual. The heart rate is fast, but the heart beats properly.inus tachycardia is a normal increase in the heart rate. How it happens. The sinoatrial (SA) node --- the heart's natural pacemaker-sends out electrical signals faster than usual. The heart rate is fast, but the heart beats properly.
Babies have a faster heart rate than adults because they are smaller. Typically, small mammals have much faster heart rates than larger mammals. For example, adult mice have an average resting heart rate of around 500 bmp, adult males around 70 bmp and adult elephants around 28 bmp.The reason is because the the smaller the animal (or person), the smaller the heart and the more work it has to do to maintain homeostasis in the body.or example, adult mice have an average resting heart rate of around 500 bmp, adult males around 70 bmp and adult elephants around 28 bmp.