The Diagnosis and Treatment of Abnormalities of Myocardial Function; With Special Reference to the Use of Graphic Methods

The Diagnosis and Treatment of Abnormalities of Myocardial Function; With Special Reference to the Use of Graphic Methods

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...which simultaneous curves of the galvanometer and the pressures from a cuff placed on the brachial are recorded. If we study the ventricular complexes carefully we are led to the conclusion that they have a normal form save for some distortion produced by the small waves of auricular activity which are present during the whole cardiac cycle, both systole and diastole. The ventricular complex may or may not be introduced by a Q deflection, both the ascending and descending limbs of the R wave are sharp and abrupt, 5 may or may not appear. T is usually present, the curve which is the result of the contraction of the lower chamber has the same characters and is of the same duration as is found in the same heart when the rhythm is of the physiological type. The records shown in Figures 121 and 122 were taken from the same patient, Figure 121, in June, 1910, when the auricles were contracting efficiently. Figure 122 was taken 10 months later, when the auricles were in fibrillation. A comparison of the ventricular portions of the two records show a marked similarity, the R and T deflections are of the same order, and of the same duration. We must therefore conclude An exception to this general statement is seen in cases of auricular fibrillation complicated by an A-V block. See Chapter XV. Figure Hi Auricular fibrillation. _ Note the complete irregularity in both time and force of the brachial waves. The ventricular complexes of the electrocardiogram show the same irregularity, the P wave is absent, the small oscillations (ff) vary greatly in size and duration, but are present throughout the whole cardiac cycle. Figure 112 Auricular fibrillation with rapid ventricular response. R varies in height according as it coincides with the summit of one of the...show more

Product details

  • Paperback | 92 pages
  • 189 x 246 x 5mm | 181g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236560167
  • 9781236560162