1-2 - 1 Using the baseline below draw and label a typical EKG including P wave PR segment QRS complex ST segment and T wave Use brackets to label the

1-2 - 1 Using the baseline below draw and label a typical...

This preview shows page 1 - 6 out of 19 pages.

1. Using the baseline below, draw and label a typical EKG including P wave, PR segment, QRS complex, ST segment, and T wave. Use brackets to label the waves-the beginning and end of each component must be clearly marked.2. What is the function of AV nodal delay?Membrane PotentialMajor ion(s) involved?Direction of ion movement with respect to cell membrane?Does it cause depolarization or repolarization?-60 mV to thresholdThreshold to 0 0 back down to -60 mV
3. Which part of the heart would take over ifIn the case of:Which part of the conduction system would control the atria?Which part of the conduction system would control the ventricles?4. Refer to the diagram below of an EKG showing third (complete) degree heart block. a. What causes heart block?b. What is happening during a complete heart block?
c. In heart block, the atrial rate is (normal, high or low?) ______________ but the ventricular rate is (normal, high or low?) __________________.5. Normal blood flow through the internal carotid artery is 400 mL/min. If this vessel’s radius isreduced by 50% of its normal radius and the pressure does not change, what is the new blood flow?6. Normal blood flow in the renal artery is 500 mL/min. Renal arterial pressure is 100 mmHg and renal venous pressure is 10 mmHg. Calculate the vascular resistance of the renal vasculature. 7. Calculate the MAP for a person with a blood pressure of 140/90.8. What is the name of the electrical signal that coordinates the individual cells’ contractions to accomplish effective pumping action?9. Is the electrical activity of the heart intrinsic or extrinsic and how?
10. Name the 3 autorhythmic cells and their rates and which one sets the rate for the entire heart and why?11. How does the resting potential drift closer to threshold with the pacemaker AP?12. The heart sets its own intrinsic rate. How can it be altered by extrinsic factors?13. List the conduction pathway.14. What 2 goals must be accomplished for the conduction system to work effectively and how?15. How does electrical activity precede mechanical activity in the heart?
16. Name the model values for each.Resting TV =Resting IRV =Resting ERV =Resting VC =Duration of one resting tidal breath =RR =PV =

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture