TAILIEUCHUNG - Ebook Color atlas of pathophysiology: Part 2

(BQ) Part 2 book "Color atlas of pathophysiology" presents the following contents: Heart and circulation, metabolism, hormones, neuromuscular and sensory systems. Invite you to consult. | Excited Non excited Sinus node AV node His bundle Bundle branches Purkinje fibers Conduction Inherent velocity rate mrs-1 min-1 T Plate Origin and Spread of Excitation in the Heart II Normal sequence of activation Time ECG ms Sinus node Impulse formation Impulse arrival at f right atrium distant parts of atrium left atrium AV node Impuls arrival Impuls transmission His bundle activated Distal bundle activated Purkinje fibers activated Subendocardial myocardium j right ventricle completely activated left ventricle Subepicardial right ventricle myocardium left ventricle completely activated 0 P wave 50 85 PQ segment 50 excitation 1251 delayed 130 L 145 150 175 190 Lqrs 205 complex 225 60-100 ị J in atrium 40 -55 25-40 -in myo- None cardium 183 Silbernagl Lang Color Atlas of Pathophysiology 2000 Thieme All rights reserved. Usage subject to terms and conditions of license. 7 Heart and Circulation The Electrocardiogram ECG The ECG is a recording of potential differences in mV that are generated by the excitation within the heart. It can provide information about the position of the heart and its rate and rhythm as well as the origin and spread of the action potential but not about the contraction and pumping action of the heart. The ECG potentials originate at the border between excited and nonexcited parts of the myocardium. Nonexcited or completely excited . depolarized myocardium does not produce any potentials which are visible in the ECG. During the propagation of the excitation front through the myocardium manifold potentials occur differing in size and direction. These vectors can be represented by arrows their length representing the magnitude of the potential their direction indicating the direction of the potential arrow head . The many individual vectors added together become a summated or integral vector A red arrow . This changes in size and direction during excitation of the heart . the arrow head

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• Color atlas of pathophysiology
• Heart and circulation
• Neuromuscular and sensory systems
• General pathophysiology of hormones
• Release of female sex hormones
• Acid–Base balance
• Salt and water balance
• Acute renal failure
• Renal hypertension
• medical textbooks
• medical knowledge
• medical research
• physiology
• pathophysiology
• 260 color illustrations
• reference for nurses
• practicing physicians