Ganong's Review of Medical Physiology, 23rd Edition

489 CHAPTER SECTION VI CARDIOVASCULAR PHYSIOLOGY 30 Origin of the Heartbeat & the Electrical Activity of the Heart OBJECTIVE ...

490 SECTION VI Cardiovascular Physiology ORIGIN & SPREAD OF CARDIAC EXCITATION ANATOMIC CONSIDERATIONS In the human heart, t ...

CHAPTER 30 Origin of the Heartbeat & the Electrical Activity of the Heart 491 is characterized by rapid depolarization (phas ...

492 SECTION VI Cardiovascular Physiology receptors decreases cyclic adenosine 3',5'-monophosphate (cAMP) in the cells, and this ...

CHAPTER 30 Origin of the Heartbeat & the Electrical Activity of the Heart 493 FIGURE 30–4 Normal spread of electrical activi ...

494 SECTION VI Cardiovascular Physiology indifferent electrode, are commonly used in clinical electro- cardiography. There are s ...

CHAPTER 30 Origin of the Heartbeat & the Electrical Activity of the Heart 495 vector or axis ). The vector at any given mome ...

496 SECTION VI Cardiovascular Physiology series of three loops: one for the P wave, one for the QRS com- plex, and one for the T ...

CHAPTER 30 Origin of the Heartbeat & the Electrical Activity of the Heart 497 CLINICAL APPLICATIONS: CARDIAC ARRHYTHMIAS NOR ...

498 SECTION VICardiovascular Physiology syncope in whom carotid sinus stimulation produces pauses of more than 3 s between heart ...

CHAPTER 30Origin of the Heartbeat & the Electrical Activity of the Heart 499 ATRIAL ARRHYTHMIAS Excitation spreading from an ...

500 SECTION VICardiovascular Physiology However, the second succeeding impulse from the SA node produces a normal beat. Thus, ve ...

CHAPTER 30Origin of the Heartbeat & the Electrical Activity of the Heart 501 ectopic foci or a circus movement. The fibrilla ...

502 SECTION VICardiovascular Physiology radiofrequency current with the catheter tip placed close to the bundle or focus. In ski ...

CHAPTER 30Origin of the Heartbeat & the Electrical Activity of the Heart 503 EFFECTS OF CHANGES IN THE IONIC COMPOSITION OF ...

504 SECTION VICardiovascular Physiology appearance of tall peaked T waves, a manifestation of altered re- polarization (Figure 3 ...

CHAPTER 30Origin of the Heartbeat & the Electrical Activity of the Heart 505 the QRS complex (ventricular depolarization), a ...

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507 CHAPTER 31 The Heart as a Pump OBJECTIVES After studying this chapter, you should be able to: ■ Describe how the sequential ...

508 SECTION VI Cardiovascular Physiology ATRIAL SYSTOLE Contraction of the atria propels some additional blood into the ventricl ...