The Cardiovascular System

Intrinsic Conduction System1. The inborn conduction system consists of __autorhythmic cardiac______ cells that initiate and distribute __impulses___ throughout the amount.2. The intrinsic conduction system coordinates heart activity by determining the direction and speed of _heart depolarization___. This leads to a set up heart contraction.3. List the functions for the following parts of the intrinsic conduction system a. SA Node __initiates the depolarizing impulse and sets the pace for the entire beat___ b. Internodal Pathway __link between the SA leaf node and the AV node__ c. AV Node __delay occurs allowing atria to contract___ d. AV cram (Bundle of His) _link between atria and ventricles__ e. Bundle Branches __convey impulses down the interventricular septum___ f. Purkinje Fibers ___convey the depolarization throughout the ventricular walls_____4. The action potentials spread from the autorhythmic cells of the intrinsic conduction system (electrical event) to the _contrac tile__ cells. The resulting mechanical events cause a heartbeat.5. A examine of the electrical activity of the heart is called a/an __electrocardiogram__.6. What do the following curl forms reflect? . P wave ___atrial depolarization___ b. QRS complex ___ventricular depolarization____ c. T wave __ventricular repolarization___7. In a normal ECG wave tracing, atrial repolarization is hidden by __QRS Complez__.8. Note Electrical events lead to mechanical events. For example, the P wave represents __atrial_ depolarization, which leads to atrial _contraction___.9. A left bundle branch block would have a wider than normal wave for the __QRS complex_. (Quiz section) 10. An abnormally fast heart rate (over one C beats per minute) is called __tachycardia___. (Quiz section)