What is the purpose of using a 6-lead ECG as opposed to only 1lead?
Describe the cascade of electrical activity through the heartwith a normal sinus rhythm. What controls HR?
What changes are anticipated in an ECG recording in thetransition from rest to exercise? What abnormal or pathologicalchanges may occur in the transition from
rest to exercise?
How does body position affect HR? What is occurringphysiologically to cause these changes?
