Which of the following can cause bradycardia? Select all that apply. a. Increased sympathetic nervous system stimulation b. Hyperkalemia 0000000000 c. Carotid sinus massage d. Beta blockers e. Digitalis
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- Your patient has a history of SVT and left-sided myocardial infarction. Patient now has a narrow complex tachycardia at a rate of 180, pulmonary edema, a blood pressure of 70/40, and is unresponsive. Which of the following should be your initial treatment? A. Lasix B. Dopamine C. Dobutamine D. Synchro cardioversion2.A. 1. 2. 3. 4. |||| ential (mv) 13. State the channels involved in an action potential in cardiac AUTORHYTHMIC cells, which ion moves across the channel, which direction each ion moves across the channel when the channel opens, the approximate membrane potential at which the channel is fully open. +20 !!| CE - | Channel AaBbCcDdEe AaBbCcD. AaBBCEDE Aal Emphasis Heading 1 Normal lon? Influx or Efflux? 14. Define the term pacemaker potential (=drifting potential) and be able to identify it when given a graph of an action potential in an autorhythmic cell such as the one below. I Membrane Potential at which channel opens or is fully open (mv)Bradycardia is all of the following except A. A heart rate of 60 beats or less B. Due to increased parasympathetic input C. Due to increased sympathetic input D. The baroreceptors and cardiac control center play a significant role in the response. Choose the correct answer
- 17, The P-wave of the ECG is generated by the repolarization of the SA-Node. A. trueB. falseWhat are the pharmacokinetics of heparin and morphine? What would the treatment protocol be for a patient with Afib with RVR? Describe the ECG changes that may occur with myocardial infarction.Can both of these questions be answered thank you 25. In case of fight or flight, ---------------------. A. Norepinephrine released from sympathetic neurons and epinephrine released from the adrenal medulla work on β1-adrenergic receptor of cardiac pacemaker cells B. Less Na+ and Ca2+ channels open in cardiac pacemaker cells C. There is a decrease in cardiac muscles contractility D. All of the above are correct E. None of the above are correct 26. Rest and digest will, ---------------------. A. Increases the heart rate B. Increases potassium conductance in the cardiac pacemaker cells C. Hypo polarize pacemaker cells D. All of the above are correct E. Only B and C are correct
- While beta blockers have no value in the treatment of an acute angina, nifedipine immediate release (oral or sublingual) can help with an acute angina attach. However, immediate release nifedipine is not recommended to treat an acute angina attach. Why?Antidysrhythmic medications had an adverse effect of which of the following (Select allthat apply.)a. Hypotensionb. Hypertensionc. Dizzinessd. Weaknesse. Panic attacksExplain why letter a, c and d are correct and why other options are incorrectI. Factors affecting Blood Pressure. ) Characterize the following into. Shade the letter of your answer A Factors that B Factors that increase blood decrease blood pressure pressure 11. Decreased arterial diameter 16. Increased total vessel length 12. Increased vessel elasticity 17. Decreased plasma epinephrine 13. Decreased blood volume 18. Decreased plasma angiotensin 14. Increased stroke volume 19. Increased plasma ADH 15. Decreased blood viscosity 20. Increased parasympathetic stimulation
- Match the structure with its intrinsic autorhythmic frequency (with no additional influences): A. Bundle of His B. Left and right bundle branches C. AV node D. Purkinje fibers E. SA node select A B C D E 1. 80-100bpm select A B C D E 2. 40-60bpm select A B C D E 3. 30-40bpm select A B C D E 4. 20-30bpm select A B C D E 5. 15-20bpm34. An arrhythmia originating in an escape pacemaker in the AV junction with a rate of 40 to 60 beats per minute is called a(n): A. Agonal intythm OB. Junctional bradycardia C. Junctional escape rhythm O D. Complete AV blocksome one with tachyarrhythmia would be expected to show an abnormally A. Larger P-R interval B. Smaller Q-T interval C. High amplitude P wave D. Larger R-R interval