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.
Rate is >100/min at rest. NOTE: There are physiological limits for how rapidly the heart can beat while in sinus rhythm. Your maximum heart rate is dependent on your age, and can be estimated by 220 minus your age (AHA- Target Heart Rates) e.g.: 20 yr old: 220-20 = 200 beats/min. 40 yr old: 220-40 = 180 beats/min.