Pacemakers of the heart Study guides, Class notes & Summaries

Rheobase - the lowest point on a strength duration curve at an infinitely long pulse duration Chronaxie time - the pulse width at twice the rheobase value. It approximates the most efficient stimulation pulse duration Charge (formula) - Charge= I(current) x T(time) Furman's formula - Energy(microjoules)= I(current)xV(voltage)xT(pulse width) Ohms law formula - Voltage(electromotive force)= I(current/flow of electrons) x R(resistance to current flow in ohms) Functional Refractory P...

Test Bank CHAPTER 1 Multiple Choice 1. What is the MOST common emergency to occur in the dental office? A. Mild allergic reaction B. Angina C. Syncope D. Anaphylaxis 2. All of the following procedures will help to prevent an emergency in a dental office EXCEPT: A. accurate medical history taking. B. taking and recording vital signs. C. updating the medical emergency kit. 3. If a patient responds positively on his or her medical history to epilepsy, you will need to be on th...

AQA A-level PSYCHOLOGY Paper 2 Psychology in context Thursday 25 May 2023 Materials For this paper you may use: • a calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. Afternoon Time allowed: 2 hours • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), us...

NR 566 Advanced Pharmacology Care of the Family Midterm SATISFIED Study Guide REAL NR566 Advanced Pharmacology NR566 Week One PI Support: Chapter 70-76 -access medicine: with chamberlain- for flash cards and review of books for free Chapter 70 Table 70.1: Classifications of Antimicrobial Drugs by Susceptible Organisms: Narrow vs. Broad spectrum? o The Difference in antibiotic coverage ▪ broad: covers more and possibly gram – and gram + ▪ narrow: covers just a few microorgan...

PCT NHA Exam Questions and answers, 100% Verified. Graded A 1. The lavender-topped tube contains: a. No additive b. SPS c. Na+ citrate d. EDTA - -d. EDTA 1. The additive in a gray-topped tube is: a. K+ oxalate b. Na+ citrate c. EDTA d. None of the above - -a. K+ oxalate 1. Which of the needle has the largest gauge? a. 16 g b. 20 g c. 21 g d. 25 g - -a. 16 g 1. Which of the following gauge needle is used for the typical adult venipuncture? a. 23 g b. 16 g c. 21 g d....

Which type of shock causes a temporary loss of motor, sensory, and reflex functions below the level of a lesion? - Answer- Spinal shock According to the rule of nines, burns of the anterior trunk and both anterior arms account for which percentage of body surface area? - Answer- 27 percent Which effect does parasympathetic stimulation have on the heart? A. It increases peripheral vascular resistance. B. It enhances atrioventricular node function. C. It shortens His-Purkinje and ventric...

AQA A-level PSYCHOLOGY Paper 2 Psychology in context Thursday 25 May 2023 Materials For this paper you may use: • a calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. Afternoon Time allowed: 2 hours • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), us...

CHAPTER 3 NEUROSCIENCE CHAPTER LEARNING OBJECTIVES 1. Understand the key methods that scientists use to learn about brain anatomy and functioning. • Neuroscientists examine autopsy tissue and patients with localized brain damage to learn about brain anatomy and brain function. • EEGs and neuroimaging, such as PET scans and fMRI, allow scientists to study brain function in the living brain. 2. Describe the two major types of cells in the nervous system and describe the prima...

Pacemakers are identified by a four-letter code, and the first letter indicates A) the chamber being paced. B) the number of chambers paced. C) the rate of modulation. D) the pacers response to a sensed event - A) the chamber being paced. It is recommended that the upper limits of exercise intensity during inpatient cardiac rehabilitation may be measured on any of the following except A) postsurgery: HRrest +30 beats · min−1 B) post-MI: HRrest + 30 beats · min−1 C) Upper limit hea...

Pacemakers of the Heart - Answer Sinoatrial (SA) node Atrioventricular (AV) node Bundle of His Bundle Branches Purkinje Fibers -SA node: p wave -SA node to AV node: PR segment -Impulse travels from Bundle of His to Bundle branches and then to Purkinje fibers: QRS complex -Repolarization of ventricles: T wave P wave - Answer sinoatrial node (SA node) starts an impulse, as the wave of depolarization spreads through the atria, _______ is inscribed on the ECG AV node conduction...