Cardiac Performance, Dr. D. Penney
Actions of Sympathetic Neurons to the Heart (through release of norepinephrine)
...... Site ................................ Action .......................................... Affecting ......
sino-atrial node ................... increases heart rate ................................ chronotropicity
atrial myocardium ................ increases atrial force .............................. inotropicity
atrio-ventricular node ............ speeds AV conduction ............................ chronotropicity
atrio-ventricular node ............ increases conduction / decreases refractoriness ... chronotropicity
ventricular myocardium ......... increases ventricular force ........................... inotropicity
Last changed 03/22/03
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