MEDICINE HURST VENTRICULAR ELECTROCARDIOGRAPHY - Part 2 ppsx

... precordial V leads were born and called V 1 , V 2 , V 3 , V 4 , V 5 , V 6 , and V 3R (Fig. 4 .21 A). The precordial V lead axes are shown in Figures 4 .21 B and 4 .21 C. The magnitude of the deflections from ... occurs a brief moment before Force 2, and Force 2 occurs a brief moment before Force 3. Force 1 is produced by depolarization of the interventricular septum; Force 2 is du...

Ngày tải lên: 14/08/2014, 07:20

... accessory pathway. The Wolff-Parkinson-White syndrome. The Wolff-Parkinson-White syndrome consists of the electrocardiographic abnormalities of ventricular pre-excitation, including a short ... waves are abnormal because they are 0.12mm wide and 2. 5mm high in leads V2 and V3. P2 is directed at +60°, and parallel with the frontal plane. P2 measures -0 .05mm/see in lead V1. These fea...

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... embolism. Prog Cardiovasc Dis 27 (4) :24 7, 1975. 4. Hurst JW, Woodson GC Jr: Atlas of Spatial Vector Electrocardiography. New York and Toronto, Blakiston, 19 52, p 20 3. 5. Castleman B, Bland EF: ... J Sports Med Phys Fitness 21 :29 9, 1981. 13. DeBusk RF: Techniques of exercise testing. In Hurst JW (ed): The Heart, Ed 7. New York, McGraw- Hill, 1990, p 1 825 . 25 3 Figure...

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... isolated guinea-pig auricles. J Physiol Lond 1970 ;20 9 :25 . 10. Vaughan-Jones RD: Intracellular chloride activity of quiescent cardiac Purkinje fibres. J Physiol Lond 1977 ;27 2: 32. 11. Schlant ... (Fig. 2. 2A). 15 1. Katz LN, Hellerstein HK: Electrocardiography, in Fishman AP, Richards DW (eds): Circulation of the Blood: Men and Ideas. New York: Oxford University Press; 1964 :...

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... Electrocardiography. New York: McGraw- Hill, 1957, p. 49.) The initial and terminal mean instantaneous QRS vectors. The frontal plane directions of the 0.0 1-, 0.0 2- , 0.0 4-, 0.0 6-, and 0.08-second ... Ventricles 64 20 . Hurst JW, Woodson GC Jr: Atlas of Spatial Vector Electrocardiography. New York: Blakiston; 19 52. 21 . Estes EH Jr: Electrocardiography and vectorcar...

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... frontal plane projections of the normal 0.0 1-, 0.0 2- , 0.0 4-, 0.0 6-, and 0.08-second QRS vectors are shown in Figure 5.9. Normally, the initial 0.0 1- to 0. 0 2- second QRS vectors are anterior to the ... serviced by the A-S and P-I divisions of the left ventricular conduction system. Left anterior-superior division block [24 ] occurs when conduction is blocked in the ant...

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... years. Am J Cardiol 1985; 55:4 32. 22 . Ouzts H, Clements SD Jr, Hurst JW: Electrical alternans associated with supraventricular tachycardia. South Med J 1980, 73: 822 . 23 . McGinn S, White PD: Acute ... subjects accidentally exposed to cold. Am J Cardiol 19 72; 29 :889. 27 . Lev M: Anatomic basis for atrioventricular block. Am J Med 1964; 37:7 42. 28 . Lenegre J: Etiology and path...

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... posteriorly. The mean terminal 0.04-second QRS vector is directed far to the right and posteriorly. The 1 2- lead QRS amplitude is about 28 2mm, indicating left ventricular hypertrophy. T waves: ... QRS loop. The 1 2- lead amplitude of the QRS complex is about 22 0mm. T waves: The mean T vector is directed at +80° in the frontal plane and 80° anteriorly. The QRS-T angle is 120 °. ST se...

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... posteriorly. The total 1 2- lead QRS amplitude is greater than 124 mm, and the QRS amplitude in lead V 5 is greater than 25 mm. The mean initial 0.04-second QRS vector is directed -7 0° to the left, about ... culprit. From Hurst JW, Woodson GC Jr: Atlas of Spatial Vector Electrocardiography. New York: Blakiston, 19 52, p. 123 . (Copyright held by JW Hurst)...

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... 23 1 Figure 11 .22 This tracing, showing the electrocardiographic abnormalities of the Wolff-Parkinson-White syndrome and atrial fibrillation (see diagram F), was recorded from a 35-year-old ... patient with coronary artery spasm is shown in Figure 11.19. 24 2 Figure 12. 3 This electrocardiogram was recorded from a 7 2- year-old man with hypertension. It was made prior to the admin...

Ngày tải lên: 14/08/2014, 07:20