For many White people, particularly those who live in White-centric communities, we never have to consider our own racial identity. I cannot tell you how many times Iâve heard White people called upon to describe their race only to have them say, âIâve never really thought about it. I guess Iâm just normal.â Hell, Iâm pretty sure I was talking this way not too long ago.
Sinus rhythm. A sinus rhythm is any cardiac rhythm where depolarisation of the cardiac muscle begins at the sinus node. It is characterised by the presence of correctly oriented P waves on the electrocardiogram (ECG). Sinus rhythm is necessary, but not sufficient, for normal electrical activity within the heart.
A heart that beats more than 100 times per minute is a condition known as tachycardia and is most prevalent in the elderly. According to medrounds.org, 88 percent of those over the age of 70 have experienced a type of fast heart rate called sinus tachycardia.hoto Credit Jupiterimages/BananaStock/Getty Images. A normal heart rate is between 60 and 100 beats per minute. A person who is very athletic, however, may have a heart rate as low as 40 beats per minute.