Telemetry med surg exam 3

Telemetry med surg exam 3 Sinus node The intrinsic pacemaker. Cell membrane "leakiness" causes spontaneous depolarization at a rate of 60-100 times a minute. AV node Acts like a resistor to slow the impulse allowing time for the atria to completely contract before initiating ventricular contraction. Back up pacemaker if SA fails, pacing at a rate of 40-60 times a minute. Bundle of his "Cable" that passes through the fibrous sheath separating atria from ventricles. Divides into the bundle branches. Bundle branches "Wires" that run down the septum and into the ventricles. There are two left bundle branches and one right. Purkinje Terminal fibers branches from the bundles, distributing the impulse throughout the ventricles. Intranodal pathways "Wiring" that allows rapid impulse movement around the atria to coordinate simultaneous atria contraction Impulse vectors SA node Atria AV node