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.
Ventricular rhythm at 60 bpm. Multiple sinus capture beats. Competing sinus and idioventricular pacemakers are present. There is underlying sinus arrhythmia, with sinus capture occurring when the sinus rate exceeds the idioventricular rate. This patient was a healthy 36-year old marathon runner with presumably very high resting vagal tone causing sinus bradycardia and sinus arrhythmia.