Phlebotomy Essentials
6th Edition
ISBN: 9781451194524
Author: Ruth McCall, Cathee M. Tankersley MT(ASCP)
Publisher: JONES+BARTLETT PUBLISHERS, INC.
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- 16. Basic Cardiac Monitoring: The Electrocardiogram • What factors influence how a clinician chooses to analyze an ECG rhythm strip? • Describe a particular ECG analysis method and identify its benefits. • Describe the advantages and disadvantages to the various treatment methods for cardiac arrhythmias.arrow_forward##33.mean arterial pressure is a product of heart rate and cardiac output none of the abouve cardiac output and total peripheral resistance stroke volume and heart rate.arrow_forward8.Normally, an adult at rest has an average cardiac output of about 5L/min, while in a trained athlete the cardiac output can reach 35L/min. Could this increase be accounted for by increased heart rate alone? Why?arrow_forward
- 10. When using a stethoscope to listen to the blood flowing through a patient's artery as you measure their blood pressure, state whether or not sounds are normally heard: a. When the Riva Rocci cuff is inflated and occluding (blocking) blood flow through the artery? (yes or no) b. When the pressure in the cuff is released and blood just begins to flow through the artery? (yes or no) c. When blood is fully and smoothly flowing through the artery? no) (yes orarrow_forward16. How do you think your blood pressure would change if you were exercising instead of sitting? EXPLAIN your reasoning.arrow_forward5. Cardiac output is defined as a. blood pressure times peripheral resistance.b. peripheral resistance times heart rate.c. heart rate times stroke volume.d. stroke volume times blood pressure.e. blood pressure minus peripheral resistance.?arrow_forward
- Caffeine lowers the heart rate by increasing rates of depolarization at the SA node True False Nicotine raises the heart rate because it stimulates the activity of the sympathetic neurons in medulla oblongata True False The Frank-Starling Law of the Heart states that the force of heart contraction is directly proportional to the initial length of the muscle fiber, within optimal limits of length True False If the sarcomeres stretched beyond the optimal length, the force of contraction would go down, but that can potentially happen only during open heart surgery when the heart is not constrained by the pericardium, lungs, ribs and diaphragm. True False It is the Na+ channel-driven spontaneous depolarization that is affected by sympathetic and parasympathetic inputs to speed up or slow down the firing rate of the SA node and other conductive cells. True Falsearrow_forward06arrow_forward4. Explain how each of the following will affect the cardiac rate and/or the stroke volume. a. Increase venous return: b. Increase sympathetic activity: c. Increase parasympathetic activity: d. Vasoconstriction in arterioles: in veins: e. Vasoconstrictionarrow_forward
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