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The Cardiovascular System Session 19 Supplemental Instruction Iowa State University Answers are in bold Leader: Course: Instructor: Date: Cody AN S 214 Dr. Selsby 3/5/13 10. Match each term with each definition, there may be more than one right answer for each term: Terms: Systole: C Diastole: J Stroke volume: B,E Heart rate: I Cardiac output: G,H Preload: F Contractility: D Ejection Fraction: A Definitions: A. Stroke Volume/End-Diastolic Volume B. Volume of blood pumped from one ventricle of the heart with each beat C. Ventricular contraction D. Contractile strength at a given muscle length, independent of muscle stretch and EDV E. EDV-ESV F. Degree of stretch of cardiac muscle cells before they contract (Frank-Starling Law) G. Heart Rate (HR) x Stroke Volume (SV) H. Volume of blood pumped by each ventricle in one minute I. Number of beats per minute J. Ventricular relaxation 11. For each event in the heart, not the measures of ventricular volume associated (or the source of the incoming blood), to trace the changes in ventricular filling. Contractile Event EX: Ventricles complete Contraction Atrial Diastole Atrial Systole Ventricles filled and ready to contract Ventricles Contract Ventricles complete contraction Measures associated or source of incoming blood ESV Values Associated XXXXXXXXXXXX XXXXXXXXXXXX EDV + 30 mL + 40 mL = 130 mL SV ESV - 70 mL = 60 mL 60 mL Supplemental Instruction 1060 Hixson-Lied Student Success Center 294-6624 www.si.iastate.edu 12. For the figure below, describe the event that is occurring during each of the phases below the figure: B, C, & D: P wave, stimulated by SA node, atrial depolarization and contraction E: Impulse is delayed to the AV node F: QRS complex, Ventricular depolarization and contraction, atrial repolarization hidden by QRS complex G: Ventricular depolarization is complete H: T wave, ventricular repolarization 13. Describe each of the Electrocardiograms below: Normal Ventricular fibrillation Junctional rhythms, No P wave 2nd degree heart block, Multiple P waves with no QRS complex following, AV node not functioning correctly Premature ventricular contraction Asystole, Flat-line