• Cycles/6 second strip 10 = Rate • When there are 10 large squares between similar waves, the rate is 30/minute Sinus Rhythm origin is the SA Node ("Sinus Node"), normal sinus rate is 60 to 100/minute • Rate more than 100/min = Sinus Tachycardia (page 68) • Rate less than 60/min = Sinus Bradycardia (page 67) · Even people who are physically fit can experience sinus bradycardia Bradycardia is often indicative of low blood pressure, pulmonary edema and congestion, abnormal rhythm, discomfort in the chest, shortness of breath, lightheadedness, and/or confusion On the other hand, symptomatic bradycardia should be attended to with the ACLS SurveyDefinition of Sinus Bradycardia Sinus bradycardia is a heart rhythm that originates in the sinus node with a rates less than 60 beats per minute Sinus bradycardia is a common condition in both healthy individuals, particularly athletes It can also occur normally during sleep Ecg Educator Blog Six Second Ecg Rhythm Strips Sinus bradycardi...