MEDICINE HURST VENTRICULAR ELECTROCARDIOGRAPHY - Part 3 pot

... 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 ... direction of the vector is somewhere between 0° and -9 0°, or between +90° and ±180°. This is illustrated in Figure 4 .33 . Note in Figure 4 .33 A that it is impossible to com...

Ngày tải lên: 14/08/2014, 07:20

... 7 :36 4. 36 . Hurst JW: Naming of the waves in the ECG, a brief account of their genesis. Circulation. 1998 (18): pg 1 937 - 1942. PART 3 ... Heart J 1952; 43: 669. 33 . Kossmann CE: The primary "T" wave of the electrocardiogram, in Hurst JW (ed): Update IV: The Heart. New York: McGraw-Hill, 1981, p. 71. 34 . Wi...

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... non-Q wave infarction, was recorded from a 50-year-old woman. The patient had angina pectoris at rest, and gave a history of previous myocardial infarction. The coronary arteriogram revealed 37 % ... initial 0.04-second QRS, mean ST segment, and mean T vectors. B-D. The spatial orientations of the mean QRS, mean initial 0.04-second QRS, and mean T vectors, respectively. 206 hypotensio...

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... hypertension is shown in Figure 13. 3. 233 Hellerstein HK: Case 40 in Hurst JW, Wenger NK (eds.): Electrocardiographic Interpretation. New York: McGraw- Hill, 19 63, p. 217. Electrocardiographic ... 231 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...

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... cardiovascular system. In Hurst JW (ed); The Heart, 7th ed, McGraw-Hill, New York, 1990, pp 3 6 -3 9. Acknowledgements George Burch and Travis Winsor wrote A Primer of Electrocardiography in 1945. [1] ... permitting me to abstract certain parts of the chapter on electrocardiography in Circulation of the Blood: Men and Ideas. [1] 22 Figure 3. 3 A. The hypothetical cell is...

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... electrode positions 4 and 5. 7. The 3R electrode is placed in same position as 3, but located on the right side of the thorax rather than the left. 34 Figure 4.7 The gross anatomy of ... exploring electrode. The electrical potential recorded by the central terminal is almost zero so the potential measured by the exploring electrode is a true potential. When a Wilson unipolar ......

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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 0.02-second QRS vectors are anterior to the ... (2) S wave in V 1 or V 2 >/= 30 mm, (3) R wave in V 5 or V 6 >/= 30 mm. c Positive if typical ST-T pattern of left ventricular strain is present (ST-T segment vec...

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... left ventricular hypertrophy, but does not reach -3 0°, as it does with left anterior-superior division block. • The mean QRS vector of left ventricular conduction delay is not directed -3 0° ... accessory pathway. The Wolff-Parkinson-White syndrome. The Wolff-Parkinson-White syndrome consists of the electrocardiographic abnormalities of ventricular pre-excitation, including a...

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... presence of left ventricular hypertrophy. However, left ventricular hypertrophy is more likely to be present when the mean QRS vector is directed from +30 ° to -3 0°, than from +30 ° to +80°. • ... electrocardiogram of right ventricular hypertrophy (see Figures 13. 2 and 13. 3, to be posted at a later date); however, its transient nature serves to eliminate the presence of right v...

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... low-potassium effect. The serum sodium level on that date was 130 .3 mEq/L, and the serum potassium level was 3. 7 mEq/L. The latter was initially questioned because the patient had been taking potassium ... be as low as 30 depolarizations per minute or less). • Premature atrial, junctional, or ventricular depolarizations. • First-degree atrioventricular block, second-degree atriovent...

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